Deadstick, I ran mine inverted for a while, during the break in process, it ran fine, and I suspect it would work perfectly in a plane. I think some people have mounted them upside down in some planes. Only real problem is if you are using a Keleo exhaust, you will have the exhaust exiting at the top.. lol.
Can anyone tell me what parts will be required in the event of this catastrophe? I assume piston, rings, pushrods and tubes...what else? Or is this something that would require new bearings/bushings conrods etc?