It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
This was a technology demonstrator and development platform for various TCV systems, etc.
Originally posted by SmokeyTheBear
I have only recently heard of this plane, ahs anyone else heard of it and if so could you tell me a little about iit,like capabilities. I would get a picture but i dont know how.
From NASA Dryden
The ACTIVE aircraft is a modified F-15, originally built by McDonnell Douglas in 1971 as the first two-seat F-15 or TF-15A #1. In the late 80's, F/A-18 stabilators were added as canards along with F100-220 engines, pitch (2D) thrust vectoring/thrust reversing nozzles, stregthened landing gear and a quad-digital fly-by-wire flight control system for use in the USAF STOL/MTD (Short Takeoff & Landing/Maneuver Technology Demonstrator) program.
When NASA acquired the aircraft in 1993, F100-229 engines with Pitch/Yaw (3D) thrust vectoring nozzles were added.
And if there's enough thrust.
Originally posted by Badger
In a sense I guess it proved the claim that digital fly by wire systems could keep a grand piano in the air if the software is good enough...
Research flights with the F-15 HIDEC began in the summer of 1990 on a program to optimize total aircraft engine performance during steady-state engine operation
Several accidents in which part or all of an aircraft's flight control system was lost prompted Dryden to establish a research program to investigate the capability of a "propulsion controlled aircraft" (PCA), using only engine thrust for flight control.
The NASA F-15 was modified to serve as the first-ever aircraft to intentionally demonstrate this PCA capability.
Initial flight studies with the pilot manually controlling the throttles and all F-15 flight controls locked showed that it was possible to maintain gross control. Altitude could be maintained within a few hundred feet using both throttles together. To climb, thrust would be added; to descend, thrust would be reduced. Heading could be controlled to within a few degrees, using differential throttle to generate yaw, which resulted in roll.
These initial flights also showed there was not enough precise flight control capability to land on a runway. This was due to the small control forces and moments of engine thrust, difficulty in controlling the airplane's shallow dive and climb motion, and difficulty in compensating for the lag in engine response.