ORIGINAL: da Rock
...I'm going to take your
to suggest humor and answer the question about the opening size...
BTW, the cowl you see in the picture is one of the easiest scratch built structured you can ever hope to do. Wrap the engine with a couple layers of masking tape to give the appropriately tight clearance and two sides of wood "pin" right up on either side. Cut a hole in the top plate of wood to fit the engine head and cap those two sides with that plate.
Yes humor, I needed a little after seeing my first attempt at a cowl.
I am here because I need suggestions to do this right so blunt is fine and I am not insulted. I will build the cowl around the engine and not the airplane next time. Could you elaborate on "...and two sides of wood "pin" right up on either side... " please? I was thinking about using contest balsa to round the cowl. What are you suggesting?
Thanks for your reply