D-Motor LF26

The D-Motor LF26 is a lightweight liquid cooled side-valve four-stroke flat four, 2.7 litre petrol aircraft engine, produced by D-Motor in Deerlijk, Belgium.

Design and development
This direct-drive aero-engine is unusual in two respects: it is very oversquare with a bore:stroke ratio of 1.295:1, and it has a side-valve (flathead) valvetrain. The designer determined that since maximum continuous power output (65.3 kW ) was to be developed at only 2800 rpm, the extra weight and complexity of overhead valves (OHV) would be superfluous. The resulting engine is compact and lightweight, with a dry weight of 58 kg, and a maximum power-to-weight ratio of 1.09 kW/kg (wet; coolant fluids weigh 5 kg ). The engine has port injection, a dry sump lubrication system, and dual ignition.

Variants
With the aid of funding from the Belgian government, D-Motor has developed a derivative 4-litre flat-six engine, the D-Motor LF39, which is claimed to produce 125 PS and to have dry weight of 78 kg.

Applications

 * BOT SC07 Speed Cruiser
 * Foxcon Terrier 200
 * Niki Lightning
 * Peak Aerospace Me 109R
 * Raj Hamsa X-Air
 * Slepcev Storch
 * Sherwood Ranger

Specifications
Reference: D-Motor