This is a partial reprint of an article that appeared in the August 1939 edition of the popular magazine 'Motor Cycling'. As mentioned earlier, a certain Lieut B. D. S Ginn entered MCC events in a BSA specially modified to drive the rear wheel. This was achieved by taking the drive from the gear-box main-shaft nose (where the speedo drive usually lives) and, using chain and sprocket, driving a shaft that ran the length of the trike to a bevel-box (ex Morgan!) which in turn drove the rear wheel via another chain and sprocket. These modifications are well illustrated here, the bevel-box even included a free-wheel assembly to allow the rear wheel to be on overrun until the front ones span. To prevent any unnecessary wear the chains were removed between observed sections

A pretty poor 'photo of B.S.Ginn, but it is the only one we have, it shows him taking part in an MCC trial, sometime in the thirties

 

Here is a view of the front-end mechanics, showing the power take off from the forward end of the gear box main-shaft to the special drive shaft that runs the length of the car

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This shows the method of taking the drive from the driven shaft to the rear wheel via a Morgan bevel box and two sprockets

 

Here we see a general view of the modifications to the three-wheeler





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