Free-flight model tests conducted at the NASA Langley full-scale wind tunnel showed the projected thrust augmentation levels were highly optimistic, and that the aircraft would most likely be incapable of vertical flight on the thrust available.
12.
A similar type of thrust augmentation but using additional fuel burnt in a turbofan's cold bypass air only, instead of the combined cold and hot gas flows as in a conventional afterburning engine, is Plenum chamber burning ( PCB ), developed for the vectored thrust Bristol Siddeley BS100 engine for the Hawker Siddeley P . 1154.
13.
Thrust augmentation of existing afterburning engine installations for special short-duration tasks has been the subject of studies for launching small payloads into low earth orbits using aircraft such as McDonnell Douglas F-4 Phantom II, McDonnell Douglas F-15 Eagle, Dassault Rafale and Mikoyan MiG-31, and also for carrying experimental packages to high altitudes using a Lockheed SR-71.
14.
He also invented the idea of the " jet wing ", in which air from the compressor of a jet engine is bled off to large " augmented " vents in the wings to provide lift for VTOL aircraft . A small amount of high-pressure air is blown into a venturi, which in turn sucks a much larger volume of air along with it, thus leading to " thrust augmentation ".
