Registered Eric Greenwell Posted April 29, 2015 Registered Report Share Posted April 29, 2015 There are times when it's convenient or safer to soar "engine on" (idling), than to turn it off. Some Rotax 912 pilots have suggested that might be hard on the engine and/or the gear box, others (including a Rotax authorized mechanic) say "no problem" with idling in flight (but everyone agrees - don't do it for hours on the ground!). For example, my last flight was great, with four hours soaring along a 55 NM convection/convergence line, with the engine idling the entire time. Idle speed was typically 2100-2200, with the oil temperature kept in the 150-180 F range using the cowl flap (this is in a Phoenix). It ran smoothly the entire time, including a few minutes of 5000 rpm cruise at the end of the flight to test the fuel flow meter.Does anyone know the answer? Has anyone tried to contact Rotax? Quote Link to comment Share on other sites More sharing options...
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