Rusty,

In post 37, you posted a picture of a wing with a cutout in it, presumably for a pipe.

I have recently acquired a pattern plane of unknown name and origin for my first foray into something other than modern pattern planes. I will post pictures in another thread as I would like to know what airplane it is, however it is going to need some work before I try and fly it. I believe that my airplane will benefit from a similar cutout, as the pipe is a little tight in the belly pan. I am not sure of the construction of the wing (other than it being foam), but is some sort of stiffener required, as in a hardwood brace or carbon tubes, prior to cutting this out so as to not detrimentally affect the structural integrity of the wing? I want to make sure everything jives correctly, however I don't want to risk the airplane imitating a bird at the expense of a better fitting pipe.

Thank you for starting this thread, there are a lot of informative posts here.