- D-Motor LF26
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D-Motor LF26 Type Piston aero engine National origin Belgium Manufacturer D-Motor The D-Motor LF26 is a lightweight liquid cooled, four-stroke, flat four, 2.5 litre petrol aircraft engine , produced by D-Motor in Deerlijk, Belgium.[1]
Contents
Design and development
This direct-drive four stroke aero-engine is unusual in having a side-valve valvetrain. The developing engineers determined that since maximum power was to be produced at only 2800 rpm, the weight and complexity of overhead valves would be superfluous. The resulting engine is compact and light at 47 kg (104 lb)[2], with a power-to-weight ratio of 1.28 kW/kg. The engine uses fuel injection, so carburetor heat is unnecessary. Lubrication is dry sump, with an external oil tank. Dual ignition is used, each cylinder having twin spark plugs sited between the valves and the piston crown.
D-Motor are developing a derivative 3.76 litre flat-six engine, with government funding[3]; and this motor is expected to produce 115 hp (86 kW) and to weigh 63 kg (139 lb).
Applications
- Raj Hamsa X-Air[4]
Specifications
General characteristics
- Type: horizontally opposed flat four
- Bore: 104mm ( 4.1 in)
- Stroke: 74 mm (2.91 in)
- Displacement: 2,512 cm³
- Length: 611 mm
- Width: 533 mm
- Height: 382 mm
- Dry weight: 47 kg with exhaust, radiator & external oil tank
Components
- Valvetrain: none (tappets only)
- Fuel system: Fuel Injection[5]
- Fuel type: AVGAS 100/130 or Auto Gas 91 Octane Minimum
- Oil system: Dry sump
- Cooling system: liquid cooling
Performance
- Power output: 77 hp (57 kW) at 2,800 RPM
- Compression ratio: 8:1
- Fuel consumption: 11 litres/h at 75% power
- Power-to-weight ratio: 1.28 kW/kg
See also
- Comparable engines
- Rotax 912
- ULPower UL260i
- Jabiru 2200
- HKS 700E
- KFM 112M
- Related lists
References
External links
Categories:- Boxer engines
- Aircraft piston engines 1990-1999
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