Heavy Fuel 4-Stroke UAV Engines

RCV Engines Visit Website

RCV Engines is a specialised manufacturer of small multi-fuel engines for unmanned aerial vehicles (UAVs). RCV’s patented revolving valve combustion system provides high fuel efficiency and low emissions, and delivers an excellent power-to-weight, making it ideal for small fixed-wing UAVs, VTOL multi-rotor UASs and hybrid/power generation applications.

Multi-Fuel UAV Engines

Rotary UAV Engines

Multi-Fuel Engines for VTOL UAVs

Heavy Fuel UAV Engines

Offering distinct advantages when operating on heavy fuels over other technologies; our engines can run on gasoline or heavy fuel (Jet-A1, JP5, JP8), as well as diesel under controlled conditions. RCV’s UAV engines are easy to calibrate and provide consistent performance over a wide range of ambient conditions. RCV UAV engines are supplied complete with exhaust, fueling system, ECU and generator mounts.

Engine options include:

  • Clockwise or anticlockwise rotation
  • Cooling fan and shrouds for unmanned helicopter use
  • Generator or starter/generator
  • Side starting
  • Muffler and airbox designs for low acoustic signature.

RCV DF70 Twin Cylinder UAV Engine

70 cc Multi-Fuel 4-Stroke Engine


The DF70 is a high-performance 4-stroke twin-cylinder UAV engine designed to military specifications for the aerospace market. Suitable for both VTOL and fixed-wing unmanned aircraft, the engine offers superior fuel economy, quiet running and excellent starting reliability.

With a capacity of 70cc and a power output of 4.2kW, the DF70 also features a boxer configuration for minimal vibration, as well as rotation options for either pusher or tractor configurations. A “limp home” mode offers the ability to run the engine on just one cylinder.


Speed Range2000 to 10000 rpm
Power (JP8)4.0 kW (5.4 hp) at 8500 rpm
Fuel Consumption (JP8)330g/kW.hr (0.54 lb/hp.hr)
Weight (complete assembly)3.0 kg (6.6 lbs)
Time Between Overhaul (VTOL)250 hrs
Time Between Overhaul (fixed-wing)500 hrs

RCV DF35 Single Cylinder UAV Engine

35 cc Multi-Fuel 4-Stroke Engine

DF 35 Single Cylinder UAV Engine

The DF35 is a single-cylinder version of the DF70 with a capacity of 35cc and a power output of 2.2kW. Featuring a reduced footprint for small unmanned aircraft applications, the DF35 can be used as a direct replacement for existing 2-stroke engines, providing upgrades in reliability, quality and multi-fuel operation.


Speed Range2000 to 10000 rpm
Power (JP8)2.2 kW (3.0 hp) at 8500 rpm
Fuel Consumption (JP8)350g/kW.hr (0.54 lb/hp.hr)
Weight (complete assembly)2.0 kg (4.4 lbs)
Time Between Overhaul (VTOL)250 hrs
Time Between Overhaul (fixed-wing)500 hrs

Custom UAV Engine Development

Our proven process for UAV engine design, development and manufacture can provide you with solutions to meet your engine requirements, based on our unique revolving valve combustion system technology. Our experienced engineers can work with your development team or provide a complete custom solution that encompasses requirements review and prototyping, through to production supply.

Engines can either be manufactured/supplied by RCV, or by the customer under a licensing agreement. 3D CAD data can be made available for installation studies.

Please get in touch to discuss your requirements for custom UAV engine solutions.

Heavy Fuel 4-Stroke UAV Engines
RCV Engines Contact Directly
RCV Engines RCV Engines Ltd
4 Telford Road, Ferndown Ind. Estate, Wimborne, Dorset BH21 7QL
+44 (0) 1202 877044 [email protected] Visit Website

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