D-Motor LF26

D-Motor

Industry	Aerospace
Headquarters	Deerlijk , Belgium
Products	Aircraft piston engines

Template:Infobox aero engine

The D-Motor LF26 is a compact, lightweight, liquid-cooled, side-valve (flathead) four-stroke flat-four petrol engine with a displacement of 2.7 litres, manufactured by D-Motor in Deerlijk, Belgium.

Design and development

This direct-drive aircraft engine stands out for two key features: it employs an oversquare configuration with a bore-to-stroke ratio of 1.295:1, and utilises a side-valve (flathead) valve arrangement. The designer concluded that since the engine’s maximum continuous power output of 65.3 kW is achieved at a relatively low 2800 rpm, incorporating overhead valves (OHV) would unnecessarily add weight and complexity. Consequently, the engine benefits from a compact form and low mass, with a dry weight of 58 kg (128 lb). When considering coolant fluids weighing 5 kg (11 lb), the maximum power-to-weight ratio reaches 1.09 kW/kg (wet). Additional features include port fuel injection, a dry sump lubrication system, and dual ignition.

Variants

Supported by Belgian government funding, D-Motor developed an enlarged derivative flat-six model known as the D-Motor LF39. This variant delivers approximately 125 PS (92 kW) and has a dry weight of around 78 kg (172 lb).

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 Template:Pistonspecs

External links

• Official website