Rolls-Royce Archives
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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 discussing available Chronograph records for braking, steering wobble, and bench testing.

Identifier  ExFiles\Box 138\2\  scan0048
Date  22th July 1926 guessed
  
COPY.

inst.

With reference to your letter of the 19th.

Whilst we have a large number of Chronograph records, they are mostly too long for reproduction purposes. However we are sending you some typical braking records and some high speed steering wobble records together with an explanation of how these are obtained and what they mean.

It might interest you to know that we have, in addition, used the instrument on the road for obtaining acceleration and tractive resistance figures.

On bench tests, the electrical Chronograph is of course useful for measuring such things as - the rate of bearing creep in a fully floating bearing, or any other rather inaccessible part moving at high speed.

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