OK had photos of four wildly different types of cowl all using the same system posted but the system here disallows all but two at a time anyway I am done with that no point for me to waste any further time.

daddyrabbit I would like to approach something else concerning your airplane that has bothered me since you posted the last photos of the J-3.

Only the cylinder head is exposed outside the cowl in the high engery air. But since you have no inlet air and very little outlet air in the covered over tunnel and the very tightly cut outlet around the exhaust at the bottom.

I beleve this will cause relitively stanant air within the cowl and even around the lower cylinder cooling fins. I think there is a good chance that you may have running problems from cronic overheating. Unless you open up that bottom cowl outlet and allow some air inlet Otherwise it just becomes an oven inside.

I think an awfull lot of the running problems some fellows go through is just simply the refusal to let those cowls breath a little more.

John