I want to experiment with airplane design for high efficiency and solar power. I want to try putting counter rotating propellers at the wingtips. I think this can be very efficient. Building an airplane out of balsa wood seems like way to much work for experimenting. The idea I have come up with is to use a Maslow CNC to cut foam frames and then use a wing covering film, like UltraCote. Here is my first attempt There are two chains that pull the router around and a motor on the router to adjust the height. It is a cheap way to be able to automatically cut very large things. We are using 1.5 inch thick Foamular 250. This is pink insulation foam rated for 25 psi. We have been having trouble going from our CAD tools to our Maslow. However, we can use easel.com to project flat things to a fixed depth and load that onto Maslow. So we had the Maslow hollow out the body of the wing and made some templates to use with a hot wire cutter. We covered the templates with a