ALLIEDSIGNAL HAS revealed details of a mini auxiliary power unit (APU), the RE100, which it is offering to Cessna for the Citation Excel and proposing for other corporate aircraft.
The RE100 is a smaller version of the 36-150 APU used on the Falcon 900 and others. It measures 520mm in length and 360mm in depth. AlliedSignal believes that between 1,000 and 1,200 RE100s could be produced for applications already identified on aircraft such as the Learjet 45 and Beechjet 450. Other projects, such as a forthcoming Dassault Falcon 20 replacement, are also believed to be suitably sized for the APU.
The single-stage centrifugal compressor and single-stage turbine APU would generate around 100kW (135shp). Without the 9kg of the associated starter generator, the basic weight of the RE100 is 34kg. "This gives us a phenomenal power-to-weight ratio for an engine of this size," says director of engineering for commercial APUs Jim Rhoden.
The first engine will undergo tests ten months after the first order is received.
Source: Flight International
