Ferg, my trigear exhaust clears the hole by about 1/4". No rubbing or
burning to report...
Jeff - Baby Blue
333 hrs
Fergus Kyle wrote:
>
> Hello,
> This afternoon's task was to poke a hole through the lower cowling
> to permit the extension of the exhaust stack to experience fresh air. I have
> done this accurately in spite of being certain that measurement and cutting
> was at best a mug's game. I am erecting a message with photos to explain
> this job, as have amazed myself by doing it. If you found it a simple task
> any fool can do, I don't want to hear about it.
> In the process of admiring the stub sticking exactly 1/8" from its
> concentric hole, it suddenly occurred to me that it's on a bouncing engine
> and the cowl is not.
> I don't want to hear about that, either.
> Nonetheless I now appeal - to those in the know - what sort of
> leeway all around this triumph must I leave to prevent burning and chafing
> of the cowl? Is 1/4" enough - 5/16"? - 3/8"?
> I guess the engine can wriggle all around the clock but suspect it
> prefers to nod in answer to my landings and their excuses - rough turf
> predominantly. Your experiences and suggestions heartily welcomed.
> Happy landings,
> Ferg
> Wiring wiring
> PS: I prefer a reply here rather than on the owners' web as it refuses my
> sign-in about 50% of the tries.
>
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