I need to make some parts too.

I'm building a stand-off scale Cessna Skymaster 337. It's a twin engine --push/pull setup.

When I say "stand-off scale"--I mean stand way the heck off about 20' away and it might ressemble a 337

I'm kit bashing/scratch building from 2 different planes and some scratch building. The fuse is from an LT-40 and the wing is from a 60 size Bingo. I'm increasing wingspan to 80" and adding removable wingtips 28" long. So- it's a 3-piece wing.

I want to make an air-scoop on the top of the center section of the wing----so that I can force air over the rear engine for good cooling. This scoop will stay permanently attatched to the wing. I want to glass it into the wing and paint it.

Picture a hood scoop on a hot rod.

I just want it to stick up about 1" and be 4" wide. It will basically be a hollow tunnel too allow air to "ram" through the tunnel and down onto the cylinder head.

I was planning on making a foam plug and using the lost foam method.

How can I make the LE of my scoop nice and rounded? I want it to have a nice radius--like a jet engine intake.

Thanks