Designed and developed under Ministry of Defence contract, this 580cc four cylinder engine produces 35.4kW (47.5BHP) at 5250 RPM. The V4 configuration offers exceptional smoothness with NVH characteristics similar to a V8 four stroke engine. Gasoline and kerosene AVTUR versions have been developed. The 30kW target performance was achieved with simple exhaust system and a very low engine mass of 18.2kg (air-cooled) or 18.5kg (liquid-cooled).
The 88-H engine is an 88cc horizontally opposed twin cylinder crankcase scavenged two stroke weighing 2.35kg and producing 4.7kW at 7500 RPM with a 20-12 propeller (max power is 4.85kW at 7800RPM with stub exhausts). Early versions of the engine were supplied for later Sprite unmanned helicopters as shown below.
