Honeywell TSCP700 is a smallturboshaft, used asauxiliary power unit on wide-bodyairliners.
It was initially developed byGarrett AiResearch, for use as an APU forMcDonnell Douglas DC-10.[1] Garrett was merged intoAlliedSignal in 1985, then intoHoneywell in 1999. Honeywell still provide support for the TSCP700's in circulation. Besides the DC-10, it is also used as APU on theMD-11 andAirbus A300/A310.[2]
TSCP700 provides a mechanical output of 105 kW (for TSP700-5 version used on Airbus aircraft).[2] It has a two-shaft architecture. The compressor design is quite peculiar, as the LP compressor isaxial and the HP compressor iscentrifugal. After the HP compressor, air is fed to a combustion chamber, and blown through two turbines. The first high-pressure turbine drives the HP compressor and provides the "useful" output (driving, e.g., a power generator), while the second, low-pressure turbine drives the LP compressor shaft.[3]
A smallgeared turbofan namedGarrett TFE731 was developed from TSCP700, borrowing its internal parts. It was successfully marketed forbusiness jets and militarytrainer aircraft.[1]
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