The Famous Ariel Square Four

In 1928 Edward Turner created the famous Sqaure Four engine.After trying to sell his design to BSA ,who rejected it,it was Ariel that took it up and hence the ARIEL SQUARE FOUR was founded.The Sqaure Four went into producton in 1931 with a 500cc chain driven engine with a hand change gearbox.
But it wasn't untill 1953 that the famous 1000cc Square Four was released,and was a geniune 100mph motorcycle,this ran untill 1959 when all production of the four strokes were stopped.A total of 15,641 were produced.
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