Rotary internal combustion engine with integrated pump

An aircraft power plant, comprising:

• an output shaft for driving a rotatable load;
• a fluid tank;
• a rotary internal combustion engine having:
• a housing having a plurality of interconnected walls enclosing rotor cavities, the plurality of interconnected walls having respective inner faces exposed to the rotor cavities and respective outer faces opposed to the inner faces, fluid passages defined by the plurality of interconnected walls between the inner faces and the outer faces;
• a pump-receiving cavity embedded within at least one wall of the plurality of interconnected walls between a corresponding outer face of the outer faces and a corresponding inner face of the inner faces, the pump-receiving cavity in fluid communication with the fluid passages;
• and
• rotors each rotatably received within a respective one of the rotor cavities of the housing, the rotors drivingly engaged to the output shaft;
• and
• a main pump received into the pump-receiving cavity, the main pump having a main inlet fluidly connected to the fluid tank and a main outlet fluidly connected to inlets of the fluid passages of the housing;
• and
• a scavenge pump received into the pump-receiving cavity, the scavenge pump having a scavenge inlet fluidly connected to outlets of the fluid passages and a scavenge outlet fluidly connected to the fluid tank.