24 February 2014, 13:38
Steam engines were enough of an improvement over horses to make the considerable engineering worthwhile, but why bother to re-invent the wheel when there are thousands of old tractors that can run on bio-diesel or wood gas generators ?
All you really need is a stationary engine pulling a plough across the field by chain or cable.
All you really need is a stationary engine pulling a plough across the field by chain or cable.