Lancair Legacy Pilot's Operating Handbook And Flight Manual
Also see for Legacy: Assembly manual
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Contents
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VII-11February 2008Legacycooled design provided with magnetos for ignition, a starter and alternator. Thesimplicity of these powerplants aids in their reliability providing they are giventhe care such a mechanical device requires. Since this is your only source of powerfor flight it only makes sense to give it that extra bit of care so that it can take careof you hour after hour.CONTINENTAL AND LYCOMINGEngine ControlsAll engines are equipped with dual magnetos which are shorted in the OFF position.It is mandatory that operation of the mags be checked prior to each flight. In thenormal operations section of this manual the proper run-up checks are described.Operation on either magneto should be smooth or the flight should be aborted andthe problem resolved. The propeller should never be rotated on the ground with-out assuming that the mags are “hot” and the OFF position should be checked foroperation by briefly switching the mags to the OFF position while at idle rpm priorto each shutdown. Normal shutdown then is accomplished by putting the mixturecontrol in the cut-off position, running the engine dry of fuel.All engines utilize a throttle to control the amount of airflow into the engine, re-stricting it with a butterfly (throttle) valve in the intake system. Full throttle allowsunrestricted airflow into the engine resulting in manifold pressures up to ambient oreven greater if you have some form of ram air pressure recovery system, resultingin maximum power output.Controllable propeller engines also have a prop control which controls the engineR.P.M. and maintains it at a set level. Maximum engine RPM at maximum throttlesettings are desired for takeoff. Cruise power settings reduce engine rpm com-mensurate with manifold pressure.Fuel/air ratio is also controlled to compensate for the large air density changes dueto operation at altitude. This mixture control reduces the fuel quantity provided tothe engine from “Rich” to “Lean.” Leaning should be accomplished in accordancewith the engine manufacture recommendations.Engine InstrumentationOil: Oil, the life blood on an engine is of prime concern. Oil quantity is onlymeasurable prior to flight and is a mandatory item in the checklist. Perhaps the mostimportant measurement during operation is oil pressure. Oil temperature is anothervaluable measurement. Proper oil type and viscosity per the engine manufacturer’s |
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