RCV Rotary Valve Multi-Fuel 4-Stroke Engines

RCV Technology for Small UAVs!

Easy to calibrate. High power to weight. Switchable multi-fuel technology. Everything RCV architecture and engineering is known for is now available in RCV rotary valve internal combustion 4-stroke engines from 2.2 to 8.61kW for small unmanned vehicles. Single, twin or 4-cylinder, off-the-shelf or customized specifically for your unmanned system — configure the RCV engine for your application.

RCV Engines Limited Rotary Valve 4-Stroke UAV Engines

Utilizing patented rotary valve technology and a four-stroke engine, RCV Engines designed for low emissions, low fuel consumption, and turn-key heavy-fuel operation. With their single-, twin-, and four-cylinder designs, these engines are easy to calibrate and provide consistent performance with RCV Engine’s unique combustion system. With no injectors in the combustion chamber to carbon up, no valve clearances to adjust, and shielded spark plugs, RCV engines have the high reliability and low maintenance that many midsize drone applications require. As the key features demonstrate, the RCV engine fits a variety of applications, including fixed-wing, rotary-wing, hybrid, marine, and portable power.

RCV Technology Key Features Include:

  • Four-stroke cycle for low emissions and fuel consumption
  • Excellent starting in a temperature range of -20°C to +40°C
  • Compact combustion system that offers:
    • Turn-key heavy-fuel operation
    • Stable response to changes in AFR or ignition timing
    • Insensitivity to changes in fuel quality or altitude
    • Resistance to detonation and carbon build up
  • Large valve breathing area gives high power with a wide power band
  • Offers high reliability, low maintenance, and long MTBO with:
    • No injectors in the combustion chamber to carbon up
    • No valve clearances to adjust
    • Shielded spark plug for minimum plug fouling and long life
  • Electronic fuel injection system with altitude compensation
  • Dedicated mounting system for 100 W to 3 kW alternators
  • Available in air cooled and liquid cooled versions
  • Switchable multi-fuel technology that provides the ability to run on any fuel at any time without compromising efficiency or reliability
  • CANbus controlled fuel map switching allows multi-fuel capability with no mechanical changes required

RCV Rotary Valve Engine Options & Features:

  • Designed to be a UAV engine, not a modified hobby engine
  • Heavy-fuel cold start assisted with cartridge heaters installed
  • 330 grams/kW hr. (0.54 lbs/hp hr.) optimized fuel consumption
  • Estimated TBO of 250 hrs. for VTOL and 500 hrs. for fixed-wing aircraft
  • Optional: Clockwise or anti-clockwise rotation
  • Optional: Pancake type power and/or starting generator
  • Additional feature: ECU with altitude compensation

RCV Rotary Valve Technology Diagram
With an RCV engine we can deliver high-quality, aerospace-qualified engines for both large and small programs. Call or contact us for specifications and prices.
RCV DF35 Rotary Valve, Single-Cylinder, Air Cooled Engine

DF35 Single-Cylinder Air Cooled Engine

This 4-stroke single cylinder DF35 Engine offers a combustion system with a patented revolving valve, creating an ideal compact combustion chamber for heavy-fuel operation. The DF35, which can be liquid or air cooled, offers reliable combustion and power on heavy-fuel. The engine also offers excellent starting over a wide range of temperatures and high power to weight ratio. Check out more key features below to determine if the RCV35 is the single cylinder engine for you!

  •  4-stroke single-cylinder rotating valve fuel injected engine
  •  35cc displacement
  •  2.2kW (3.0 hp) @ 8500 rpm maximum power
  •  10000 rpm maximum continuous revs
  •  Gasoline; JP5, JP8, Jet A-1, and similar kerosene-based fuels
  •  Oil/Fuel Ration 25:1
  •  Air cooled
  •  2100 grams ± 200 grams total weight. Includes base engine, ECU, fuel system, wiring and standard exhaust. Generator, prop and cowlings not included.
RCV DF35 Data Sheet
RCV DF35LC Rotary Valve, Single-Cylinder, Liquid Cooled, 4-Stroke Engine

DF35LC Single-Cylinder Liquid Cooled Engine

This 4-stroke single cylinder DF35 Engine offers liquid cooling, and reliable combustion and power on heavy-fuel. The engine also offers excellent starting over a wide range of temperatures and resistance to detonation. Designed to be an engine for UAV’s, the DF35LC has the high reliability and low maintenance your UAV requires. Check out more key features below to determine if the DF35LC is the single cylinder engine for you!

  •  4-stroke single-cylinder rotating valve fuel injected engine
  •  35cc displacement
  •  2.2kW (3.0 hp) @ 8500 rpm maximum power
  •  10000 rpm maximum continuous revs
  •  Gasoline; JP5, JP8, Jet A-1, and similar kerosene-based fuels
  •  Oil/Fuel Ration 25:1
  •  Liquid cooled
  •  2100 grams ± 200 grams total weight. Includes base engine, ECU, fuel system, wiring and standard exhaust. Generator, prop and cowlings not included.
RCV DF35LC Data Sheet
RCV DF70 Rotary Valve, Twin-Cylinder, Air Cooled, 4-Stroke Engine

DF70 Twin-Cylinder Air Cooled Engine

This 4-stroke twin cylinder engine offers high reliability, low maintenance and long MTBO. Designed as a UAV engine, the DF70 Engine offers an electronic fuel injection system with altitude compensation and a dedicated mounting system for 100 W to 3 kW alternators. As a twin cylinder, the DF70 engine has a 70cc capacity and offers 4.2 kW of power at 8500 rpm. Check out more key features below or contact our team to determine if the DF70 engine is right for your project.

  •  4-stroke twin-cylinder rotating valve fuel injected engine
  •  70cc displacement
  •  4.2kW (5.7 hp) @ 8500 rpm maximum power
  •  10000 rpm maximum continuous revs
  •  Gasoline; JP5, JP8, Jet A-1, and similar kerosene-based fuels
  •  Oil/Fuel Ration 25:1
  •  Air cooled
  •  3000 grams ± 200 grams total weight. Includes base engine, ECU, fuel system, wiring and standard exhaust. Generator, prop and cowlings not included.
RCV DF70 Data Sheet
RCV DF70LC Rotary Valve, Twin-Cylinder, Air Cooled, 4-Stroke  Engine

DF70LC Twin-Cylinder Liquid Cooled Engine

With liquid cooling to enable enclosed engine installation, this 4-stroke twin cylinder engine offers high reliability and low maintenance. The DF70 Engine is designed with no injectors in the combustion chamber to carbon up, no valve clearances to adjust and shielded spark plugs for minimum plug fouling and long life. Check out more key features below or contact our team to determine if the DF70 engine is right for your project.

  •  4-stroke twin-cylinder rotating valve fuel injected engine
  •  70cc displacement
  •  4.2kW (5.7 hp) @ 8500 rpm maximum power
  •  10000 rpm maximum continuous revs
  •  Gasoline; JP5, JP8, Jet A-1, and similar kerosene-based fuels
  •  Oil/Fuel Ration 25:1
  •  Liquid cooled
  •  3000 grams ± 200 grams total weight. Includes base engine, ECU, fuel system, wiring and standard exhaust. Generator, prop and cowlings not included.
RCV DF70LC Data Sheet