|
|
Aaron Cohen
| Title |
Aaron Cohen |
| Full Description |
Aaron Cohen served as NASA Acting Deputy Administrator from February 19, 1992 to November 1, 1992. Mr. Cohen started at NASA's Johnson Space Center in 1962 working on the Apollo program. After Apollo he served as Manager of the Space Shuttle orbiter, directing the development and testing of the orbiter. In 1986 he assumed the position of Johnson Space Center Director. After retiring from NASA in 1993, Mr. Cohen became the Zachry Professor of Engineering at his alma mater, Texas A&M University. |
| Date |
12/20/1982 |
| NASA Center |
Johnson Space Center |
|
Dr. Mae C. Jemison, First Af
…
| Title |
Dr. Mae C. Jemison, First African-American Woman in Space |
| Full Description |
The first African-American woman in space, Dr. Mae C. Jemison was born on October 17, 1956 in Decatur, Alabama but considers Chicago, Illinois her hometown. She received a Bachelor in Chemical Engineering (and completed the requirements for a Bachelor in African and Afro-American studies) at Stanford University in 1977. Dr. Jemison also received a Doctorate degree in medicine from Cornell University in 1981. After medical school she did post graduate medical training at the Los Angeles County University of Southern California Medical Center. As an area Peace Corps medical officer for Sierra Leone and Liberia in West Africa, she managed the health care delivery system for U.S. Peace Corps and U.S. Embassy personnel. Jemison's background includes work in the areas of nuclear magnetic resonance spectroscopy, and reproductive biology. She also developed and participated in research projects on the Hepatitis B vaccine and rabies. Jemison was a General Practitioner and attending graduate Engineering classes in Los Angeles when she was named an astronaut candidate in 1987. She flew her first flight as a science mission specialist on STS-47, Spacelab-J, in September 1992. She was co-investigator for the Bone Cell Research Experiment on that mission. In completing her first space flight, Jemison logged 190 hours, 30 minutes and 23 seconds in space. Jemison resigned from NASA in March 1993. In 1994, she founded and began a term as chair of The Earth We Share (TEWS), an annual international science camp where students, aged 12 to 16, work together to solve current global dilemmas. From 1995- 2002 she was a professor of Environmental Studies at Dartmouth College. She is currently director of the Jemison Institute for Advancing Technology in developing countries. She is the recipient of numerous awards and honors, including induction into the National Women's Hall of Fame and several corporate boards of directors on the Texas Governor's State Council for Science and Biotechnology Development. Dr. Jemison published her memoirs, Find Where DE:the Wind Goes:Moments from My Life in 2001. She currently resides in Houston, Texas. |
| Date |
07/1992 |
| NASA Center |
Johnson Space Center |
|
Female Astronauts
| Title |
Female Astronauts |
| Full Description |
Astronauts Dr. N. Jan Davis (left) and Dr. Mae C. Jemison (right) were mission specialists on board the STS-47 mission. Born on November 1, 1953 in Cocoa Beach, Florida, Dr. N. Jan Davis received a Master degree in Mechanical Engineering in 1983 followed by a Doctorate in Engineering from the University of Alabama in Huntsville in 1985. In 1979 she joined NASA Marshall Space Flight Center as an aerospace engineer. A veteran of three space flights, Dr. Davis has logged over 678 hours in space since becoming an astronaut in 1987. She flew as a mission specialist on STS-47 in 1992 and STS-60 in 1994, and was the payload commander on STS-85 in 1997. In July 1999, she transferred to the Marshall Space Flight Center, where she became Director of Flight Projects. Dr. Mae C. Jemison, the first African-American woman in space, was born on October 17, 1956 in Decatur, Alabama but considers Chicago, Illinois her hometown. She received a Bachelor degree in Chemical Engineering (and completed the requirements for a Bachelor degree in African and Afro-American studies) at Stanford University in 1977, and a Doctorate degree in medicine from Cornell University in 1981. After receiving her doctorate, she worked as a General Practitioner while attending graduate engineering classes in Los Angeles. She was named an astronaut candidate in 1987, and flew her first flight as a science mission specialists on STS-47, Spacelab-J, in September 1992, logging 190 hours, 30 minutes, 23 seconds in space. In March 1993, Dr. Jemison resigned from NASA, thought she still resides in Houston, Texas. She went on to publish her memoirs, Find Where the Wind Goes: Moments from My Life, in 2001. The astronauts are shown preparing to deploy the lower body negative pressure (LBNP) apparatus in this 35mm frame taken in the science module aboard the Earth-orbiting Space Shuttle Endeavor. Fellow astronauts Robert L. Gibson (Commander), Curtis L. Brown (Junior Pilot), Mark C. Lee (Payload Commander), Jay Apt (Mission Specialist), and Mamoru Mohri (Payload Specialist) joined the two on their maiden space flight. The Spacelab-J mission was a joint effort between Japan and the United States. |
| Date |
09/15/1992 |
| NASA Center |
Johnson Space Center |
|
Hubble Sees Changes in Gas S
…
| Title |
Hubble Sees Changes in Gas Shell around Nova Cygni 1992 |
| General Information |
What is an Early Release Observation? A photograph of a celestial object that demonstrates the performance of a new Hubble camera. What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. The Hubble telescope has given astronomers their best look yet at a rapidly ballooning bubble of gas blasted off a star. The shell surrounds Nova Cygni 1992, which erupted Feb. 19, 1992. A nova is a thermonuclear explosion that occurs on the surface of a white dwarf star in a double-star system. The image [right], taken after Hubble's near-sightedness had been corrected, reveals an elliptical and slightly lumpy ring-like structure. The ring is the edge of a bubble of hot gas blasted into space by the nova. Another Hubble picture taken 467 days after the explosion [left] provided the first glimpse of the ring and a mysterious bar-like structure. But the image interpretation was severely hampered by the telescope's blurred vision. |
|
Hubble Provides Clearest Vie
…
| Title |
Hubble Provides Clearest View Yet of Supernova 1987a |
| General Information |
What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. This series of images of Supernova 1 987A was taken with ESA's Faint Object Camera aboard NASA's Hubble Space Telescope, prior to and following the HST Servicing Mission. The images demonstrate the dramatic improvement in Hubble's capabilities following the installation of the Corrective Optics Space Telescope Axial Replacement (COSTAR), which compensates for spherical aberration in Hubble's primary mirror. The new picture has provided the most detailed closeup view ever obtained of the exploding star and its surroundings. Since SNi1987A first appeared in the southern sky nearly seven years ago (February 24, 19871, the outer envelope of the exploding star has been expanding into space at many thousands of kilometers per second. To follow the evolution of the ejecta, astronomers have observed SN 1 987A a total of six times with the FOC -- from just after HST's launch in 1990 to just before the HST Servicing mission in December 1993. |
|
Distant Heavyweight Galaxy C
…
| Title |
Distant Heavyweight Galaxy Cluster Clobbers Dense-Universe Theory |
|
Hubble Finds a Young Planeta
…
| Title |
Hubble Finds a Young Planetary Nebula |
| General Information |
What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. This is a NASA Hubble Space Telescope picture of a recently-formed ?planetary nebula,? known as Hen 1357. This expanding cloud of gas was ejected from the aging star in the center. Much of the gas is concentrated in a ring which appears tilted 35 degrees. Besides the big clumps in the ring, HST's detailed images reveal many smaller clumps and wisps of gas, indicating turbulent motions and other activity in the nebula. Two bubbles of gas seen above and below the ring have burst open at their ends, allowing gas from inside to escape. |
|
Hubble Sees Gas Shell Around
…
| Title |
Hubble Sees Gas Shell Around Nova Cygni 1992 |
|
Evolution of the P/Shoemaker
…
| Title |
Evolution of the P/Shoemaker-Levy 9 "Gang of Four" Region |
|
SAMPEX - A Synoptic View of
…
| Title |
SAMPEX - A Synoptic View of Earth's Electron Radiation Belts: North Pole Energetic Fluxes from PET |
| Abstract |
The Solar Anomalous and Magnetospheric Particle Explorer, SAMPEX, measures fluxes of energetic particles from the sun, the Earth's magnetosphere, and cosmic ray sources over a broad range of energies. The four instruments aboard SAMPEX are the Low-Energy Ion Analyzer (LEICA), The Heavy Ion Large Telescope (HILT), The Mass Spectrometer Telescope (MAST), and the Proton-Electron Telescope (PET). |
| Completed |
1995-01-01 |
|
AVHRR Semi-Global Fire Data:
…
| Title |
AVHRR Semi-Global Fire Data: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Semi-Global Fire Data:
…
| Title |
AVHRR Semi-Global Fire Data: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
SAMPEX - A Synoptic View of
…
| Title |
SAMPEX - A Synoptic View of Earth's Electron Radiation Belts: North Pole Energetic Fluxes from HILT |
| Abstract |
The Solar Anomalous and Magnetospheric Particle Explorer, SAMPEX, measures fluxes of energetic particles from the sun, the Earth's magnetosphere, and cosmic ray sources over a broad range of energies. The four instruments aboard SAMPEX are the Low-Energy Ion Analyzer (LEICA), The Heavy Ion Large Telescope (HILT), The Mass Spectrometer Telescope (MAST), and the Proton-Electron Telescope (PET). |
| Completed |
1995-01-01 |
|
AVHRR Fire Data over South A
…
| Title |
AVHRR Fire Data over South America: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over South A
…
| Title |
AVHRR Fire Data over South America: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over the Atl
…
| Title |
AVHRR Fire Data over the Atlantic: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over the Atl
…
| Title |
AVHRR Fire Data over the Atlantic: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over Africa:
…
| Title |
AVHRR Fire Data over Africa: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over Africa:
…
| Title |
AVHRR Fire Data over Africa: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
Flooding of the Missouri Riv
…
| Title |
Flooding of the Missouri River. Before (Sept 1992) and during/after (Sept 1993) |
| Abstract |
The three river scenes shown here are from central Missouri near Gasconade, Rocheport, and the confluence of the Grand River. The first in each pair was in September, 1992, the second in September of 1993. Notice the farmland in the river flood plain. The data uses Landsat TM bands 5, 4, and 2 mapped to red, green, and blue respectively. Bare soil and plowed land appears red, vegetation (which reflects very strongly in the near infrared) appears green, and water is dark blue. The perspective in each of these images is looking aproximately westward, which is upstream. |
| Completed |
1999-04-09 |
|
SAMPEX - A Synoptic View of
…
| Title |
SAMPEX - A Synoptic View of Earth's Electron Radiation Belts: South Pole Energetic Fluxes from PET |
| Abstract |
The Solar Anomalous and Magnetospheric Particle Explorer, SAMPEX, measures fluxes of energetic particles from the sun, the Earth's magnetosphere, and cosmic ray sources over a broad range of energies. The four instruments aboard SAMPEX are the Low-Energy Ion Analyzer (LEICA), The Heavy Ion Large Telescope (HILT), The Mass Spectrometer Telescope (MAST), and the Proton-Electron Telescope (PET). |
| Completed |
1995-01-01 |
|
AVHRR Global Fire Data: Apri
…
| Title |
AVHRR Global Fire Data: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Global Fire Data: Apri
…
| Title |
AVHRR Global Fire Data: April 1992 through December 1993 (1 month/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
SAMPEX - A Synoptic View of
…
| Title |
SAMPEX - A Synoptic View of Earth's Electron Radiation Belts: South Pole Energetic Fluxes from HILT |
| Abstract |
The Solar Anomalous and Magnetospheric Particle Explorer, SAMPEX, measures fluxes of energetic particles from the sun, the Earth's magnetosphere, and cosmic ray sources over a broad range of energies. The four instruments aboard SAMPEX are the Low-Energy Ion Analyzer (LEICA), The Heavy Ion Large Telescope (HILT), The Mass Spectrometer Telescope (MAST), and the Proton-Electron Telescope (PET). |
| Completed |
1995-01-01 |
|
Restorer: An Example with Oz
…
| Title |
Restorer: An Example with Ozone Data |
| Abstract |
Restorer is a visualization technique for indicating the location of missing data in a scientific visualization. Rather than filling missing data regions with interpolated data colored with the same scale as real data or simply leaving such regions empty, the restorer technique fills the regions with interpolated data colored with a color table with only luminance values. This technique allows missing data to be indicated clearly without distracting from the content of the real data. |
| Completed |
1994-08-24 |
|
AVHRR Global Fire Data: Apri
…
| Title |
AVHRR Global Fire Data: April 1992 through December 1993 (3 months/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Global Fire Data: Apri
…
| Title |
AVHRR Global Fire Data: April 1992 through December 1993 (3 months/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over Africa:
…
| Title |
AVHRR Fire Data over Africa: April 1992 through December 1993 (3 months/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over Africa:
…
| Title |
AVHRR Fire Data over Africa: April 1992 through December 1993 (3 months/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over South A
…
| Title |
AVHRR Fire Data over South America: April 1992 through December 1993 (3 months/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
AVHRR Fire Data over South A
…
| Title |
AVHRR Fire Data over South America: April 1992 through December 1993 (3 months/second) |
| Abstract |
AVHRR 10-day fire averages from the Space Applications Institute, Joint Research Centre of the European Commission |
| Completed |
1998-12-07 |
|
Yearly Arctic Temperature An
…
| Title |
Yearly Arctic Temperature Anomaly |
| Abstract |
This animation shows the yearly temperature anomaly over the Arctic region from 1981-82 through 2002-03. Years run from August 1 through July 31. Blue hues indicate cooling regions, red hues depict warming. Light regions indicate less change while darker regions indicate more. The temperature scale used ranges from -7.0 to +7.0 degrees Celsius in increments of .25 degrees (see color bar below). |
| Completed |
2003-10-16 |
|
X-31 in Flight with F-18 Cha
…
| Photo Description |
A head-on view of the X-31 Enhanced Fighter Maneuverability Demonstrator aircraft (right), accompanied by a NASA F-18 chase aircraft during a research flight over the desert floor. The X-31 had a three-axis thrust-vectoring system, coupled with advanced flight controls, to allow it to maneuver tightly at very high angles of attack. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
X-31 Quasi-Tailless (Artist
…
| Photo Description |
This is a computer enhanced artist's concept of a semi-tailless X-31 Enhanced Fighter Maneuverability Aircraft in flight. In 1994, software was installed in the X-31 to demonstrate the feasibility of stabilizing a tailless aircraft at supersonic speed, using thrust vectoring. This software allowed destabilization through the control laws of the aircraft in incremental steps to the goal of simulation 100 percent tail-off. Quasi-tailless tests began in 1994. The first phase started with supersonic evaluations at Mach 1.2. Later subsonic evaluations were performed. During the flights the aircraft was destabilized with the rudder to stability levels that would be encountered if the aircraft had a reduced-size vertical tail. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1993 |
|
X-31 Quasi-Tailless (Artist
…
| Photo Description |
This is a computer enhanced artist's concept of a semi-tailless X-31 Enhanced Fighter Maneuverability Aircraft in flight. In 1994, software was installed in the X-31 to demonstrate the feasibility of stabilizing a tailless aircraft at supersonic speed, using thrust vectoring. This software allowed destabilization through the control laws of the aircraft in incremental steps to the goal of simulation 100 percent tail-off. Quasi-tailless tests began in 1994. The first phase started with supersonic evaluations at Mach 1.2. Later subsonic evaluations were performed. During the flights the aircraft was destabilized with the rudder to stability levels that would be encountered if the aircraft had a reduced size vertical tail. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
X-31 in Banked Flight over E
…
| Photo Description |
One of two X-31 Enhanced Fighter Maneuverability Demonstrator aircraft, flown by an international test organization at NASA's Dryden Flight Research Center, Edwards, California, turns tightly over the desert floor on a research flight. The aircraft obtained data that may apply to the design and development of highly-maneuverable aircraft of the future. The X-31 had a three-axis thrust-vectoring system, coupled with advanced flight controls, to allow it to maneuver tightly at very high angles of attack. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
X-31 Kiel Probe Side View
| Photo Description |
A photograph of the noseboom on the X-31 shows the Kiel air data probe angled at 10 degrees to better align the tip with the airflow at very high angles of attack. The devices were mounted on the nose of the X-31s to measure air pressure. Icing in the unheated Kiel probe on the first X-31 (Bu. No. 164584), caused that aircraft to crash on January 19, 1995. The aircraft obtained data that may apply to the design and development of highly-maneuverable aircraft of the future. Each had a three-axis thrust-vectoring system, coupled with advanced flight controls, to allow it to maneuver tightly at very high angles of attack. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
June 1993 |
|
X-31 Enhanced Fighter Maneuv
…
| Photo Description |
The X-31 Enhanced Fighter Maneuverability aircraft in flight over California?s Mojave desert during a 1992 test flight. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
April 1992 |
|
X-31 #1 in Flight over Edwar
…
| Photo Description |
The first X-31 (Bu. No. 164584) flies over Edwards Air Force Base, California, in 1993. Aircraft 584 completed 292 flights during the Enhanced Fighter Maneuverability (EFM) program before being lost on January 19, 1995 when icing in the nose probe caused the flight control computer to receive bad data. German test pilot Karl-Heinz Lang ejected after the aircraft became uncontrollable. The program continued, using the second aircraft (Bu. No. 164585). |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
August 1993 |
|
X-31 at High Angle of Attack
| Photo Description |
The X-31 aircraft, on a research mission from NASA's Dryden Flight Research Center, Edwards, California, is flying nearly perpendicular to the flight path while performing the Herbst maneuver. Effectively using the entire airframe as a speed brake and using the aircrafts unique thrust vectoring system to maintain control, the pilot rapidly rolls the aircraft to reverse the direction of flight, completing the maneuver with acceleration back to high speed in the opposite direction. This type of turning capability could reduce the turning time of a fighter aircraft by 30 percent. The Herbst maneuver was first conducted in an X-31 on April 29, 1993, in the No. 2 X-31 aircraft by German test pilot Karl-Heinz Lang. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
X-31 Demonstrating High Angl
…
| Photo Description |
The X-31 aircraft on a research mission from NASA's Dryden Flight Research Facility, Edwards, California, is flying nearly perpendicular to the flight path while performing the Herbst maneuver. Effectively using the entire airframe as a speed brake and using the aircraft's unique thrust vectoring system to maintain control, the pilot rapidly rolls the aircraft to reverse the direction of flight, completing the maneuver with acceleration back to high speed in the opposite direction. This type of turning capability could reduce the turning time of a fighter aircraft by 30 percent. The Herbst maneuver was first conducted in an X-31 on April 29, 1993, in the No. 2 aircraft by German test pilot Karl-Heinz Lang. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
X-31 at High Angle of Attack
| Photo Description |
The X-31 aircraft on a research mission from NASA's Dryden Flight Research Center, Edwards, California, is flying nearly perpendicular to the flight path while performing the Herbst maneuver. Effectively using the entire airframe as a speed brake and using the aircrafts unique thrust vectoring system to maintain control, the pilot rapidly rolls the aircraft to reverse the direction of flight, completing the maneuver with acceleration back to high speed in the opposite direction. This type of turning capability could reduce the turning time of a fighter aircraft by 30 percent. The Herbst maneuver was first conducted in an X-31 on April 29, 1993, in the No. 2 X-31 aircraft by German test pilot Karl-Heinz Lang. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
X-31 in Flight with F-18 Cha
…
| Photo Description |
One of two X-31 Enhanced Fighter Maneuverability Demonstrator aircraft (top), flown by an international test organization at NASA's Dryden Flight Research Center, Edwards, California, is seen here accompanied by a NASA F-18 chase aircraft during a research flight over the desert floor. The X-31 had a three-axis thrust-vectoring system, coupled with advanced flight controls, to allow it to maneuver tightly at very high angles of attack. |
| Project Description |
The X-31 Enhanced Fighter Maneuverability (EFM) demonstrator flew at the Ames- Dryden Flight Research Facility, Edwards, California (redesignated the Dryden Flight Research Center in 1994) from February 1992 until 1995 and before that at the Air Force?s Plant 42 in Palmdale, California. The goal of the project was to provide design information for the next generation of highly maneuverable fighter aircraft. This program demonstrated the value of using thrust vectoring (directing engine exhaust flow) coupled with an advanced flight control system to provide controlled flight to very high angles of attack. The result was a significant advantage over most conventional fighters in close-in combat situations. The X-31 flight program focused on agile flight within the post-stall regime, producing technical data to give aircraft designers a better understanding of aerodynamics, effectiveness of flight controls and thrust vectoring, and airflow phenomena at high angles of attack. Stall is a condition of an airplane or an airfoil in which lift decreases and drag increases due to the separation of airflow. Thrust vectoring compensates for the loss of control through normal aerodynamic surfaces that occurs during a stall. Post-stall refers to flying beyond the normal stall angle of attack, which in the X-31 was at a 30-degree angle of attack. During Dryden flight testing, the X-31 aircraft established several milestones. On November 6, 1992, the X-31 achieved controlled flight at a 70-degree angle of attack. On April 29, 1993, the second X-31 successfully executed a rapid minimum-radius, 180-degree turn using a post-stall maneuver, flying well beyond the aerodynamic limits of any conventional aircraft. This revolutionary maneuver has been called the "Herbst Maneuver" after Wolfgang Herbst, a German proponent of using post-stall flight in air-to-air combat. It is also called a "J Turn" when flown to an arbitrary heading change. The aircraft was flown in tactical maneuvers against an F/A-18 and other tactical aircraft as part of the test flight program. During November and December 1993, the X-31 reached a supersonic speed of Mach 1.28. In 1994, the X-31 program installed software to demonstrate quasi-tailless operation. The X-31 flight test program was conducted by an international test organization (ITO) managed by the Advanced Research Projects Office (ARPA), known as the Defense Advanced Research Projects Office (DARPA) before March 1993. The ITO included the U.S. Navy and U.S. Air Force, Rockwell Aerospace, the Federal Republic of Germany, Daimler-Benz (formerly Messerschmitt-Bolkow-Blohm and Deutsche Aerospace), and NASA. Gary Trippensee was the ITO director and NASA Project Manager. Pilots came from participating organizations. The X-31 was 43.33 feet long with a wingspan of 23.83 feet. It was powered by a single General Electric P404-GE-400 turbofan engine that produced 16,000 pounds of thrust in afterburner. |
| Photo Date |
1994 |
|
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