SCREW PROPELLED VEHICLE - Todo Terreno a "Tornillo" -

http://www.facebook.com/testeadoss http://www.testeados.com They exchange their wheels for wide pontoons, which wrap around a helical surface, invented by Archimedes, Greek mathematician who lived from 287-212 BC. Generally, these vehicles, excellent in mud, snow and water prove otherwise slow, fuel-efficient and important traces appear behind them. Hard surfaces such as roads are closed to them. They can still move sideways, but their steering is no more assured, unless the 'Amfirol'. Anyway, th

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