Preliminary Flight Evaluation of F100 Engine Model Derivative Airstart Capability in an F-15 Airplane
Cho, Tony K. and Burcham Jr., Frank W. (1984) Preliminary Flight Evaluation of F100 Engine Model Derivative Airstart Capability in an F-15 Airplane. Technical Report NASA TM-86031, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
A series of airstarts was conducted in an F-15 airplane at the NASA Ames Research Center's Dryden Flight Research Facility with two prototype F100 engine model derivative (EMD) engines equipped with digital electronic engine control (DEEC) systems. The airstart envelope and time required for airstarts were defined. The success of an airstart is most heavily dependent on airspeed. Spooldown airstarts at 200 knots and higher were all successful. Spooldown airstart times ranged from 53 sec at 250 knots to 170 sec at 175 knots. Jet fuel starter (JFS)-assisted airstarts were conducted at 175 knots at two altitudes, and airstart times were 50 sec and 60 sec, significantly faster than unassisted airstart. The effect of altitude on airstarts was small. In addition, the airstart characteristics of the two test engines were found to closely resemble each other. The F100 EMD airstart characteristics were very similar to the DEEC-equipped F100 engine tested previously. Finally, the time required to spool down from intermediate power compressor rotor speed to a given compressor rotor speed was found to be a strong function of altitude and a weaker function of airspeed.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Airstart, F100 engine, F-15 airplane |
| Subjects: | (01 - 09) Aeronautics: (07) Aircraft Propulsion And Power Aircraft/Project: F-15 |
| ID Code: | 623 |
| Deposited On: | 01 Febuary 2006 |
| Additional Information: | 31 pages. |
