Honeywell RQ-16 T-Hawk

Micro Air Vehicle UAV (Unmanned Aerial Vehicle)
Powered by Two Cylinder 60cc RCV Engine

The gasoline engine powered RQ-16 is reported to weigh 8.4 kilograms (20 lb), have an endurance of around 40 minutes, 10,500-foot (3,200 m) ceiling and an operating radius of about 6 nautical miles (11 km). Forward speeds up to 70 knots (130 km/h) have been achieved, but the G-MAV is operationally restricted to 50 knots (93 km/h) by software. VTOL operation is subject to a maximum wind speed of 15 knots (28 km/h). Sensors include one forward and one downward looking daylight or IR cameras.

Wikipedia : Honeywell RQ-16 T-Hawk

The air sucked through this fan creating thrust.

Rotating Engine for a micro air vehicle.

A backpack-sized unmanned aerial vehicle from Honeywell will likely use a 60-cc engine designed and built by RCV Engines Ltd., Brighton, U.K.It should deliver 4.2 bhp at 8,200 rpm, and run on JP8, as well as a variety of other fuels.

RCV engines have the same induction, compression, power, and exhaust strokes as a conventional four-stroke engine. But in conventional engines, gasses enter and leave cylinders via poppet valves in the cylinder head which are operated by a mechanical valve train.

In the RCV engine, the cylinder is mounted on bearings and rotates at exactly half the crankshaft rotational speed. It is driven from the crankshaft either through a gear train or toothed belt. The cylinder also has a large port and combustion chamber. When the port lines ups with a hole in the turning cylinder, it opens the intake or exhaust ports. Conversely, the intake and exhaust ports are closed when the port is not aligned with the hole. This technology, which is ideal for under-250-cc powerplants, reduces manufacturing costs, lowers emissions, and tends to generate stable, high-speed performance.


RCV Engines Ltd has been selected by Honeywell to produce a demonstrator engine based
on the company's patented Rotating Cylinder Valve technology. Intended for use in
Honeywell's backpack-sized Micro Air Vehicle (MAV), the high power to weight ratio and multi-fuel capability available from RCV technology make this type of engine an  ideal choice for Unmanned Aerial Vehicle (UAV) applications

The MAV autonomous surveillance aircraft has been developed as part of the US Defense
Advanced Projects Agency (DARPA) MAV Advanced Concept Technology Demonstration programme. The vehicle is small enough for a foot soldier to carry on his/her back and is designed to provide soldiers with improved situational awareness without exposing them to enemy fire through forward- and downward-looking video cameras that relay information to a remote ground station video terminal.