Abstract: Improved combustor volume in turbine engines without an increased engine envelope is accomplished in an engine 10 have a radial compressor 12, an axial turbine 16, and a radial combustor 20 in which a generally radial flow path extends between a compressed air inlet 30 and a turbine nozzle 22 for gases of combustion produced by combusting fuel introduced through a fuel injector 34 with air introduced through the compressed air inlet 30.

Abstract: A guide vane assembly for controllably varying fluid mass flow rates past compressor blades in an auxiliary power unit. The auxiliary power unit comprises a rotary apparatus for compressing fluid in a compressor housing wherein a plurality of compressor blades are mounted on a rotating hub. A fluid flow path extends through the housing which has a duct portion extending upstream of the compressor blades to an inlet plenum to define at least a portion of the fluid flow path. The guide vane assembly includes a central gear box adjacent the compressor housing which has a ring gear mounted for limited rotational movement. A plurality of guide vanes are disposed in the duct portion of the housing and are mounted for pivotal movement responsive to rotational movement of the ring gear. The guide vane assembly is adapted to convert rotation of the ring gear to pivotal movement of the guide vanes.