Hey Bill,

nice to have a first response to the project! (Oops, second, I just saw your post Rich.)

Yea, believe it or not, the G20/15's were made that way. I think there was also a G20/19, if I recall correctly, that had no head fins. All three engines are designed around the same crankcase. I think that since the piston in the 15 is of fairly small bore, the sleeve and crankcase are able to absorb/dissipate enough heat. I've actually run that 15 a fair bit on CL planes at full rpm's and there's not a hint of varnish on it! So it must be cooling adequately. I think I used to run 10% nitro in it.

Yup, the wing and stab are foam core. I picked up 1/32" balsa for the stab but thought I might just use regular 1/16" balsa for the wing. 1/32" ply might be a nice option too but I'm thinking that a thicker airfoil might be preferable (I want to be able to see it after all... ) and 1/16" sheeting would actually be a better match to the plans.

... I was hoping someone wouldn't say something like "a very involved project". In my mind I figured I would just get it done when I needed a little distraction... NOT! Thanks for keeping me honest Bill.

David.