• Source: 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 (128 lb), and a maximum power-to-weight ratio of 1.09 kW/kg (wet; coolant fluids weigh 5 kg (11 lb)). 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 (92 kW) and to have dry weight of 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




= General characteristics

=
Type: 4-cylinder liquid-cooled horizontally-opposed piston engine
Bore: 103.6mm (4.079 in)
Stroke: 80 mm (3.15 in)
Displacement: 2690 cm3
Length: 611 mm
Width: 533 mm
Height: 382 mm
Dry weight: 58 kg with exhaust, radiator & external oil tank




= Components

=
Valvetrain: camshaft in block, side valves
Fuel system: port injection
Fuel type: AVGAS 100/130 or petrol 91, 93, 95, 98 RON
Oil system: Dry sump
Cooling system: liquid cooling




= 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

HKS 700E
Jabiru 2200
KFM 112M
Revmaster R-2300
Rotax 912
Sauer S 2200 UL
Sauer S 2400 UL
Sauer S 2100 ULT
ULPower UL260i
Verner 133M
Related lists

List of aircraft engines




References






External links


Official website

Kata Kunci Pencarian:

• D-Motor LF26
• D-Motor
• D-Motor LF39
• Flat-six engine
• Flat-four engine
• Rotax 912
• Stroke ratio
• Svenska Flygfabriken LN-3 Seagull
• Light-sport aircraft
• List of aircraft engines