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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).
Letter providing feedback on plug performance, brake linings, and standardization across various car models.

Identifier  ExFiles\Box 162\6\  img174
Date  24th August 1932 guessed
  
3/
this it will improve the performance of the plug. So will you please state the minimum barrel length you can use.

I am very glad to hear that the H.13 has come through its 10,000 mile test satisfactorily, & that you propose to standardise this model. Could you tell me if you intend to use it both on the Phantom & on the 25 H.P. Cars. I hope that we may get at last some of your orders for plugs on the 25 H.P. Car.

I am very much obliged to you for testing the brakes on my car. I find them very good now & think the new linings on the front brakes have considerably improved matters.
Please address your reply to me here where I shall be until the 29th inst.

Sincerely Yours,
Bernard Hopps.
  
  


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