by CaseyCooper » Mon Jan 25, 2021 9:13 pm
Kai,
I agree completely. Perhaps we’re saying the same thing differently. The line coming from the can to the oil pump, below the gear box, is under suction. The line from the sump, to the can, is under pressure. Like you said, crank case pressure.
But I agree with the compressed air. It’s important to prime the pump after an oil change, especially for first oil add when new, with a dry/partially dry pump.
However, your oil cooler should not be between the sump and can. It should be between can and oil pump. Reason being, if you cool the oil substantially before it reaches the can, the heated water in the oil system does not vapor off and go out the vent. It should go in the can hot, through the cooler, and back through engine cool, so we can get rid of that junk.
But I agree! I actually know a guy this happened to, he panicked and crashed his plane because he lost oil pressure, and instead of just flying the plane to a safer area and maybe toasting the engine, he put the plane down in a terrible spot and destroyed the plane. Sometimes panic just gets the better of you in those situations
N7777X
Tailwheel
Rotax 912
3 blade Warp Drive