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Tables which compare calculated results with test data provide indications of method accuracy. Extensive references to related material are also included. The report was compiled from September 1975 to September 1977 by the McDonnell Douglas Corporation in conjunction with the engineers at the Flight Dynamics Laboratory at Wright-Patterson Air ...
In February 1976, work commenced to automate the methods contained in the USAF Stability and Control DATCOM, specifically those contained in sections 4, 5, 6 and 7.The work was performed by the McDonnell Douglas Corporation under contract with the United States Air Force in conjunction with engineers at the Air Force Flight Dynamics Laboratory in Wright-Patterson Air Force Base.
Dimensionless numbers (or characteristic numbers) have an important role in analyzing the behavior of fluids and their flow as well as in other transport phenomena. [1] They include the Reynolds and the Mach numbers, which describe as ratios the relative magnitude of fluid and physical system characteristics, such as density, viscosity, speed of sound, and flow speed.
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
Loss of tail-rotor effectiveness (LTE) [1] occurs when the tail rotor of a helicopter is exposed to wind forces that prevent it from carrying out its function—that of cancelling the torque of the engine and transmission. Any low-airspeed high-power environment provides an opportunity for it to occur.
Torque; system unit code symbol or abbrev. notes conversion factor/N⋅m combinations Industrial: SI: Newton-metre: Nm N⋅m 1 Nm lbft; Nm lbfft; Non-SI metric: kilogram-metre: kgm kg·m 9.80665 Imperial & US customary: pound-foot: lbft lb⋅ft Pound-inch (lb.in) is also available 1.3558 Scientific: SI: newton metre: Nm N⋅m 1 Nm lbft; Nm ...
4 total force as of September 2023 (USAF Almanac). [1] T-51 Cessna: United States basic trainer: T-51A: 3 3 total force as of September 2023 (USAF Almanac). [1] T-53A Kadet II: United States basic trainer: T-53A: 24 24 T-53A total force as of September 2023 (USAF Almanac). [1] 25 T-53A operational (WAF 2025). [2] TC-135 Stratolifter: United ...
The critical engine is defined in aviation regulations for the purpose of designing the tail, and for experimental test pilots to measure V MC s in flight. Other factors like bank angle, and thrust have a much greater effect on V MC s than the difference of a critical and a non-critical engine.