I am looking into the idea of building a huge RC plane out of foamboard. HUGE. From what I've seen, foamboard can fly some pretty crazy stuff, like a Ran D. St. Claire plane I can't find currently that is like a bunch of smaller planes linked at the wingtip. I think it was at least 15 feet long. Or the tank plane made by FT which I can't imagine was very light. Obviously there is a big difference between 40 and 15 feet but I'd still like to hear everyones thoughts.