Drawing: Cobra Drawing: Cobra


The diffuser section is bolted to the compressor section and consists of an inner and outer housing separated by welded stationary vanes. The vanes have been designed and shaped to slow the high velocity incoming air and convert it into pressure. It also changes the radial air flow direction to longitudinal flow before directing it into the combustion section. The inner housing supports the #2 main bearing. The outer housing contains the three mounting pads and a "piggy back" bleed air collector chamber that augments the bleed air stored in the hollow annulus around the centrifugal compressor housing.

Drawing: Diagram of diffuser section

Bleed air is hot compressed air which is bled from the engine diffuser section just prior to it entering the combustion chamber. The air is stored in the piggy back chamber and hollow annulus in the centrifugal compressor housing. It is used to anti-ice the air inlet section of the engine, heat the cabin, defrost the windshields and power the engine/transmission oil cooling fan. Engine anti-icing is accomplished through a "fail safe" anti-icing valve located in the tube between the bleed air adapter and inlet housing port. Fail safe means electrical power is required to keep the valve closed. The valve is controlled by the anti-icing switch on the engine control panel.

Air inlet Compressor T-53-L-13 Combustor Exhaust diffuser


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Updated: 12 January 2008
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Born on 20 February 1999