Sky Power International has developed the SP-180 SRE APU demonstrator mobile test and evaluation system, based on the SP-180 SPRE-hybrid Wankel engine.

The system is space-saving, lightweight, and efficient, with features including an exhaust and silencer, engine control unit, starter and alternator, fuel pump, electrical system, thermal system, and cooling circuit.

The Wankel engine offers significant advantages in APU applications, making it more efficient and environmentally friendly.