Preliminary Flight Test Results of the F100 EMD Engine in an F-15 Airplane
Myers, Lawrence P. and Burcham Jr., Frank W. (1984) Preliminary Flight Test Results of the F100 EMD Engine in an F-15 Airplane. Technical Report NASA-TM-85902, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
A flight evaluation of the F100 engine model derivative (EMD) has recently been conducted at NASA Ames Research Center's Dryden Flight Research Facility. The F100 EMD is an advanced version of the F100 engine that powers the F-15 and F-16 airplanes. The F100 EMD features a bigger fan, higher temperature turbine, a digital electronic engine control system (DEEC), and a newly designed 16-segment afterburner, all of which resulted in a 15- to 20-percent increase in sea-level thrust. The flight evaluations consisted of investigations of performance (thrust, fuel flow, and airflow) and operability (transient response and airstart) in the F-15 airplane. The performance of the F100 EMD has been excellent. Aircraft acceleration time to Mach 2.0 was reduced by 23 percent with two F100 EMD engines. Several anomalies were discovered in the operability evaluations. With the intial DEEC logic, the throttle response for formation flying was poor and received a Cooper-Harper pilot rating of 6 to 8. A software change to the DEEC improved the throttle, and subsequent Cooper-Harper ratings of 3 to 4 were obtained. The augmentor operation was initially limited by a failure to light at high-altitude and low-airspeed conditions; a hardware change was made to eliminate the problem. In the extreme upper left-hand corner of the flight envelope, compressor stalls occurred when the throttle was retarded to idle power. These stalls were not predicted by altitude facility tests or stability asessements for the compressor.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Advanced F100 engine, digital electronic engine control (DEEC), increased thrust, improved operability, flight test, light-off detector |
| Subjects: | (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: F-15 |
| ID Code: | 600 |
| Deposited On: | 01 Febuary 2006 |
| Additional Information: | 12 pages. This paper was prepared for the 20th AIAA/ASME/SAE Joint Propulsion Conference, Cincinnati, Ohio, June 11-13, 1984. |
