Perhaps the most unorthodox use of corrugated iron was the Bob Semple tank [1] of WWII. It was basically a corrugated iron shell on a Caterpillar D8 chassis, wi

Perhaps the most unorthodox use of corrugated iron was the Bob Semple tank [1] of WWII. It was basically a corrugated iron shell on a Caterpillar D8 chassis, with 6 machine guns for armament. The eponymous designer and New Zealand's Minister for Works at the time, Bob Semple, based his design off a photo of an American tank he had on a postcard. Needless to say, it wasn't exactly successful. Only 3 prototypes were built, none were used in combat, and they were eventually converted back into tractors. [1] https://en.wikipedia.org/wiki/Bob_Semple_tank https://en.wikipedia.org/wiki/Bob_Semple_tank