The National Transonic Facility (NTF), also known internally as facility 1236, is a high-pressure, cryogenic, closed-circuit wind tunnel at the

Langley Research Center The Langley Research Center (LaRC or NASA Langley), located in Hampton, Virginia, near the Chesapeake Bay front of Langley Air Force Base, is the oldest of NASA's field centers. LaRC has focused primarily on aeronautical research but has also ...

Hampton, Virginia Hampton is an independent city (United States), independent city in the Commonwealth of Virginia in the United States. The population was 137,148 as of the 2020 United States census, 2020 census, making it the List of cities in Virginia, seve ...

. It uses nitrogen gas, at high pressure, to cool the air which allows flight aerodynamics to be duplicated in small scale. The cross section of the tunnel is high and wide. Unlike full-scale wind tunnels, the NTF can adjust airflow to match any model size down to 1/50 scale. The facility can operate at temperatures ranging from -250°F to + 150°F. To achieve lower than ambient temperature, liquid nitrogen is sprayed into the tunnel through nozzles upwind of the fan used to accelerate the air. The facility has tested aircraft such as the

Boeing 777 The Boeing 777, commonly referred to as the Triple Seven, is an American long-range wide-body airliner developed and manufactured by Boeing Commercial Airplanes. The 777 is the world's largest twinjet and the most-built wide-body airliner. ...

Boeing 767 The Boeing 767 is an American wide-body airliner developed and manufactured by Boeing Commercial Airplanes. The aircraft was launched as the 7X7 program on July 14, 1978, the prototype first flew on September 26, 1981, and it was certified ...

Space Shuttle The Space Shuttle is a retired, partially reusable launch system, reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. ...

as well as blended wing designs such as the

B-2 The Northrop B-2 Spirit, also known as the Stealth Bomber, is an American Heavy bomber, heavy strategic bomber, featuring low-observable stealth aircraft, stealth technology designed to penetrator (aircraft), penetrate dense anti-aircraft war ...

bomber,

A-6 Intruder The Grumman A-6 Intruder is a twinjet all-weather subsonic attack aircraft developed and manufactured by American aircraft company Grumman Aerospace. It was formerly operated by the U.S. Navy and U.S. Marine Corps. The A-6 was designed in ...

F-18 The McDonnell Douglas F/A-18 Hornet is an all-weather supersonic, twinjet, twin-engine, carrier-based aircraft, carrier-capable, Multirole combat aircraft, multirole combat aircraft, designed as both a Fighter aircraft, fighter and attack airc ...

Hornet.National Transonic Facility - NasaCRgis
/ref> File:NTF STS wind tunnel model.jpg, Space Shuttle model used in testing at the NTF File:NTF Nitrogen input.jpg, Instrumentation penetration File:2001 Boeing 777 Test NTF.jpg, Boeing 777 model under test

References

, coordinates = Langley Research Center Wind tunnels Buildings and structures in Hampton, Virginia {{Virginia-struct-stub