The fuselage bleed-air line had ruptured inside the aircraft, and fourteenth stage compressor bleed air
from the engines was blowing high-pressure, 900-degree Fahrenheit bleed air into the cabin.
These perturbations propagate throughout the engine and integrated subsystems that utilize compressor bleed air
. Second, the engine model reduces the simulation time of a vehicle level T2T model tool making it feasible to simulate thousands of simulations needed for a complex optimization routine of a large system.
However, performance studies done by FRDC engineer Bob Abernethy showed that for a J58 application requiring continuous high Mach number afterburner operation, ducting compressor bleed air
directly into the afterburner not only eliminated the stall margin limits, but it also provided better engine performance.