Astazou XVI
The circular air inlet behind the reduction gear has a de-icing device using hot air. The compressor's two axial stages use blisks. The shaft runs on ball bearings. Air flow through the annular combustion chamber is S-wise, with fuel being added in radial direction by a rotating atomizer disc. The blades of the three-stage turbine's wheels, also blisks, are air-cooled from the inside. The jet nozzle is fixed with an interior cone. Auxiliary drives are mounted on a mounting plate behind the inlet, which also has the connections for starter motor/generator, oil and fuel pumps, engine speed control and tachometer. There are also optional drives for an AC generator and a hydraulic pump. The whole engine is mounted at three points, two trunnions on the right and left front of the turbine casing and one on its underside to the rear. Speed control is effected automatically by governing the injection volume, with a thermal regulator allowing for short-term overloads.
Read more about this topic: Turbomeca Astazou