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I thought I'd share this info I found today. We did a test with a Lancair 360 and pulled the top cowling off. This airplane has the plenum top cooling system and stock Lancair 360 cowlings.
We put clay all over the engine and mount to check clearances since this airplane has about 90 hours on it with no problems in the cowl areas. Here are the results.
From Starter ring to cowl 5/16"
At the fwd point of the case just behind the flywheel 3/32"
Number 1 cylinder plug cover to to cowl - 1/8"
Engine mount on the dynafocal ring to top cowl 1/32"
All other areas where 1/4 inch or more.
Bryan
On Jan 19, 2008 6:17 AM, Peter Sokolowski < air.peter@googlemail.com> wrote:
Hi,
well - I can tell you that I have the same situation. My engine is an O360 F1A6 with a forward governor and as I tried to match the spinner of my future MT prop with the cowling. I have recognized that the space between the cowling and this special high point of the forward crankcase is close to 0. I discussed this with my technician and the result is, that I have to build up a special bulge. Ugly - but necessary for clearance purposes.
BTW - what kind of engine do you have ?
Best regards an good luck
Peter
LNC 360, 90% and 50% to go
2008/1/17, sbej <
sbej@verizon.net>:
Pertaining to 360's: have a fwd mount prop
gov. and plenum top cooling. The problem is: Because of the fwd mount prop
gov. there is a high spot in the case. You have to make a special bulge in
the plenum top in order for it to fit over the engine case. Because of
this The top cowl sit right on top on the bulge in the plenum top at the
fwd point where the prop gov is. There is no clearance at all here.
It has to sit right on it in order to properly line up with the
spinner.
Is this ok?
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