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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Proposed system for carrying two wheels at the rear using a triangular bracket and a dummy hub.

Identifier  ExFiles\Box 114\4\  scan0187
Date  14th November 1923
  
BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design}
c. to BJ. Hs.{Lord Ernest Hives - Chair}

Y5400

DA{Bernard Day - Chassis Design}3/M14.11.23.

G.4. TWO WHEELS AT REAR
WITHOUT LUGGAGE.
X.5400
X.5600

herewith we send N.sch.2760 shewing the
system of carrying two wheels at the rear without luggage.
It will be seen that a species of dummy hub
is proposed supported by a triangular bracket a off the
rear cross member.

We are dispensing with the shoes.

It will be seen that this arrangement cannot
be fitted, as drawn, to an existing car, but it will not be
needed until 16-G-4. The existing car 14-G-4 will have one
wheel and luggage, and we will endeavour when sending you that,
to arrange that it can be fitted to an existing car.

DA.{Bernard Day - Chassis Design}
  
  


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