The Light Weight Engine Houtekietstraat 11
B-8540 Deerlijk, Belgium
EFFECTIVITY
page 22
ALL
19-3-2019
It is recommended to note the level before and after turning the propeller in order to memorise the
increase of the level. Once this is memorised one may not need to turn the propeller each time to control
the oil level as the increase should be always the same.
Operation
As with all engines, the way you treat your engine will increase or decrease tremendously its life
expectancy, the consumption, the maintenance costs and deterioration of your engine. The following
recommendations will help to ensure you get the best out of your D Motor LF26 engine :-
•
The take-off or full power setting should be applied only once the engine coolant and oil has
reached its minimum temperature of 50°C.
•
Reduce the power setting after the take-off and once you reached a safe altitude, increase
airspeed in a cruise climb keeping cooling airflow over the engine and coolant radiator, this will
reduce fuel burn and wear on the engine. Do not opt for high angles of attack in your climb
configuration, unless it is necessary to clear geographical obstacles
•
Flying fast does not always mean a reduction in flight time to reach your destination. By reducing
the power setting speed your reduced slightly, but the fuel consumption is significantly reduced
and your operational significantly increased. Please see the consumption table under paragraph
“7.5 Range and Fuel Consumption”.
•
Avoid rapid changes of the power setting (except in case of emergency). It is better to increase or
decrease the power setting slowly and smoothly. Significant and sharp power setting changes
means high stresses for the crankshaft, especially for direct driven engines.
•
Each engine coming from serial production has typical behaviour at different power settings, this
is a characteristic of each individual engine. T
he LF26 engine runs extremely smoothly, it’s
recommended to avoid low power settings where your engine might exhibit vibration, increasing
the RPM slightly at low power settings will ensure smooth running
•
Should your engine show unexpected starting difficulties this may emanate from contamination in
the injectors or on the spark plugs. These contaminants may be removed by using a special
cleaning program built into the ECU. To start the cleaning program, set the throttle to full power
setting, switch on the ignition and the ECU, and activate the starter for a few seconds. In this
configuration the engine will not start, but initiate will initiate the cleaning program.
After running the cleaning program switch OFF the ECU, then switch the ECU ON again and try
once more to start up the engine in the normal way.
Emergency Procedures
Engines for Microlight, Ultra-light or LSA aircraft are not certified, but certification is no guarantee that
an engine will not suffer failures. Please note that any aircraft and/or engine configuration can suffer
failure. Should any irregularity occur or reading go out of parameter before or during the take-off roll
