UAV Engines AR731

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UAV Engines AR731 is a rotary engine for use in unmanned aerial vehicles ( UAV ) from the British manufacturer UAV Engines . It is an air-cooled single-disc rotary engine with a particularly favorable weight / performance ratio. The period of use between two engine overhauls is between 10 and 50 hours, depending on the operating profile. It was originally developed by Norton as the Norton NR731.

The engine is used in the General Atomics Aeronautical Systems Prowler and IAI Harpy drones, among others . It is designed as a loss engine, as the IAI Harpy, for example, destroys itself after a flight time of 6 hours at the latest.

Technical specifications

  • Rotors: 1
  • Chamber volume: 208 cm³
  • Power: 28 kW at 7800 min -1
  • Weight: 9.9 kg
  • Fuel: Otto, from 95 octane
  • Torque: 35 Nm at 7000 min -1
  • Specific fuel consumption when cruising: 321 g / kWh
  • Length: 600 mm
  • Width: 328 mm
  • Height: 262 mm