No, they're left open. At the time I didn't realize one is supposed to install bulkheads there. All I have is a strip of 1.5" wide .040 alu lying flat following the cowl curve around. Stabilizes the cowl exits a bit.

You have the fiberglass extensions? Want to sell them cheap?

Finn

Russell Duffy wrote:

Hey Finn, I know you don't have the cowl extensions on your plane, but do you have the rear of the cowl cheeks blocked off, or are they open?  I'm thinking they're probably blocked off, but I can't recall for sure.  I looked at installing mine today, and realized that it was going to require significant work, since the rear cheek bulkhead doesn't come close to fitting.