Half pontoon boat, half auger, screw-propelled vehicles ... [REDNIC79] goes through the conversion of a lawn tractor into a slow, theoretically unstoppable, Canadian screw-propelled tractor.

Hit the jump to find out more about Scania's boat-tail-equipped tractor-trailers. Scania has begun practical tests of a rear air deflector known as a boat-tail, which can reduce fuel consumption ...