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D-Motor LF26

Belgian aircraft engine From Wikipedia, the free encyclopedia

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.[1]

Quick Facts Type, National origin ...
D-Motor LF26
Type Piston aero engine
National origin Belgium
Manufacturer D-Motor
Developed into D-Motor LF39
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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[2]) 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 (128 lb),[2] and a maximum power-to-weight ratio of 1.09 kW/kg (wet; coolant fluids weigh 5 kg (11 lb)[2]). The engine has port injection, a dry sump lubrication system, and dual ignition.

Variants

With the aid of funding from the Belgian government,[3] D-Motor has developed a derivative 4-litre flat-six engine, the D-Motor LF39, which is claimed to produce 125 PS (92 kW) and to have dry weight of 78 kg (172 lb).[4]

Applications

Specifications

Reference: D-Motor[2]

General characteristics

Components

Performance

  • Power output: Max 68.9 kW (93.7 PS; 92.4 hp) at 3,100 RPM; continuous 65.3 kW (88.8 PS; 87.6 hp) at 2,800 RPM
  • Compression ratio: 8:1
  • Fuel consumption: 16 litres/h at 100 % power
  • Power-to-weight ratio: Max 1.09 kW/kg (wet); continuous 1.04kW/kg (wet)

See also

Comparable engines

Related lists

References

External links

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