I have been building and flying RC aircaft for about 45 years, last year i got a wild hair to quick build a plane for an event my club was holding. We traditionally , as a club, all get together on new years day to fly whatever we can known in the hobby as "first to fly". As this was a snap decision the only material i could get my hand on in short order was Gildan tee shirt boxes from sanmar
The plane was completely scratch built from some sketches I made up. The wing was hot wire cut from foam building insulation the balance of the airplane was made out of Gildan cardboard boxes from SanMar shipments.
Wingspan was 60 inches, power was .40 CuIn nitro engine spinning a 10 inch diameter prop.
the pics below tell the rest of the story. Really is cardboard from sanMar.
mooseman