D-Motor LF39
| Industry | Aerospace |
|---|---|
| Headquarters | Deerlijk , Belgium |
| Products | Aircraft engines |
The D-Motor LF39 is a compact, liquid-cooled, side-valve (flathead) four-stroke flat-six petrol engine with a displacement of four litres, designed and manufactured by D-Motor in Deerlijk, Belgium. It represents an evolution of the flat four D-Motor LF26 model.
Design
Delivering an output of 125 hp (93 kW), the LF39 weighs approximately 74 kg (163 lb) when dry. Its power output increases almost linearly, starting at 50 kW at 1920 rpm and reaching up to 91.55 kW at 3100 rpm. Similar to the smaller LF26, this aero-engine employs a direct-drive configuration with a side-valve (flathead) valvetrain. It features port fuel injection, a dry sump lubrication system, and incorporates dual ignition for enhanced reliability.
Development
Supported by funding from the Belgian government, the LF39 was developed as an extended version of the LF26. During its creation, challenges arose with casting the flat-six cylinder block and issues related to the flywheel and alternator components. These difficulties were addressed by implementing a lighter flywheel equipped with neodymium magnets.
The anticipated retail price in 2014 was approximately €17,800.
In September 2014, EDM Aerotec reported successful test flights of the LF39 installed in their EDM Aerotec CoAX 2D/2R coaxial rotor helicopter. They stated, "We are pleased to showcase the six-cylinder in operation. Following over 100 hours of test flights... the coaxial helicopter powered by the six-cylinder... demonstrated an ideal match according to the test pilots." Additionally, they noted that another six-cylinder engine had been mounted in a test aircraft in Belgium.
Applications
Specifications
Source: D-Motor Template:Pistonspecs