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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).
Recommendation to use the Lucas starter motor on Hs' car based on its established reliability and simplicity.

Identifier  ExFiles\Box 109\5\  scan0258
Date  20th July 1939
  
663.

By.{R.W. Bailey - Chief Engineer} from Rm.{William Robotham - Chief Engineer}
c. By/NS.{Norman Scott}

Rm{William Robotham - Chief Engineer}12/R.20.7.39.

LUCAS STARTER MOTOR ON Hs{Lord Ernest Hives - Chair}' CAR.

This is to confirm our recommendation that the Lucas Starter Motor should be put on this car.

We have not tried the Lucas Starter on the 8-cylinder engine yet because there is no scheme for fitting it to such an engine. We have, however, a great deal of experience with it in the Laboratory, and also 18 months running on it on two separate cars, one of which has been subjected to intensive starter motor work in addition to its ordinary running. Therefore, its reliability is reasonably well-established.

With regard to its ability to turn the engine over, Laboratory tests show that it is not inferior to the Rolls-Royce Motor in this respect.

In view of its simplicity of design, we think that we must get all the experimental cars running on this type of motor.

Rm.{William Robotham - Chief Engineer}
  
  


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