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The AR741 has an outstanding power-to-weight ratio combined with much longer life and better SFC than any alternative engine. It has been developed from the mature AR731 target drone engine to meet the needs of small surveillance-type UAVs. The engine has successfully completed a 150 hour FAR-33 type endurance test.
UAV DESIGN FEATURES
Exceptionally high power-to- weight ratio.
Economical fuel consumption.
Low cross sectional area.
Low levels of vibration.
Long life
ENGINE TYPE Single rotor Wankel-type spark ignition engine.
CAPACITY 208 CC chamber size.
POWER OUTPUT 38bhp (maximum) at 7800 rpm.
WEIGHT 23.5 lbs (10.7 kg) without generator.
FUEL ConSUMPTION 0.57 lb/bhp/hr at maximum power, 0.52 lb/bhp/hr at cruise.
VIBRATION LEVEL Nominally zero radial vibration. (Peak instantaneous torque is 4 times mean.).
IGNITION SYSTEM Electronic contact-less magneto. RFI suppressed HT system.
GENERATOR Provision for mounting GEC/Plessey 28 V, or 900 or 1500 watt (alternatives optional).