Lewis Have A Question
Posted: 14 Mar 2016, 21:13
If Your Flying the A2A Cub Inverted Can you Hurt the Motor ? Greatengine
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I don't think that overheating will be a problem in those circumstances. First of all in a small engine like this the majority of the cooling is done by airflow anyways. Secondly if there is no fuel supply there will be no combustion and without combustion there will not be a lot of heat generated. Of course you'll always generate some heat due to friction but that won't overheat the engine.LZ-WIL wrote:Technically it will die out of fuel starvation shortly, since it is a carburetor fed engine and once inverted the fuel level in the carburetor is disrupted.
The main damage may come from the fact, that there will be not enough oil to lubricate the crankshaft and cool the engine, since the plane is inverted the crankcase will be dry. The engine needs to run some time without proper lubrication to start overheating and get damaged.(However this process depends entirely on the conditions: amount of lubrication left, engine rpm and engine cooling) I am sure Mr. Henriques from A2A and other guys that are real world pilots will be able to provide more details on the matter. I hope this explains the basics.
You are right in this particular case of engine being inverted, no combustion and a lot of aircooling. I was more likely talking in general in this paragraph, if the engine is put to oil starvation that it will start generating more heat than usual.LZ-WIL wrote:The engine needs to run some time without proper lubrication to start overheating and get damaged.(However this process depends entirely on the conditions: amount of lubrication left, engine rpm and engine cooling)
Thanks Piper for the great answer I figured it would not be so good. Heidi Didn't like it to well. I just wanted to invert to see what action she would have. also I just wanted to invert this cub to see If I could do it I did . but won't be anymore. Thanks for quick answer Greatengine.Piper_EEWL wrote:My name is not Lewis but I'm gonna answer anyways if that's ok!?
Yes you can! When flying inverted the oil pump will not be able to suck in oil and thus the engine will loose the oil pressure. You can argue that the engine will also stall because you won't have a fuel supply either when inverted but due to the windmilling of the propeller the engine will still turn.
So inverted = no oil pressure = engine damage (at least in planes that are not equipment with aerobatic engines which have a dry sump lubrication system.)
Happy flying
Hi Speedy 70 I had Heidi Going for a ride so I just inverted to see what she had to say. Also I just wanted to Invert just for the challenge Thanks for answering me. Greatengine.speedy70 wrote:Why on earth would you want to fly inverted in the Cub anyway.
Cheers Chris
Hi Thanks for your great answer After hearing all the problems I won't be flying Inverted in the A2A cub anymore Thanks again Greatengine.LZ-WIL wrote:Exactly,
Brutal metal to metal friction without oil lubrication will bring moving parts (crankshaft, pistons etc.) to stand still and engine to a complete blockage.
Cheerz,
Will
Thanks for the answers GreatenginePiper_EEWL wrote:Agreed
You're very welcome. Well that's the beauty of the simulator. You can try stuff that would be risky for the plane or your health without jeopardizing either one in RL. The only thing you risk in the sim (at least with the A2A planes) is your hard earned hours on engine and airframe I tried to loop the B-17 the other day just to see what would happen. It worked! And I didn't break anything. The crew wasn't to happy with this maneuver thoughgreatengine wrote: Thanks Piper for the great answer I figured it would not be so good. Heidi Didn't like it to well. I just wanted to invert to see what action she would have. also I just wanted to invert this cub to see If I could do it I did . but won't be anymore. Thanks for quick answer Greatengine.