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).
Brake system tests, evaluating heat expansion and the performance of Ferodo brake material.

Identifier  ExFiles\Box 26\4\  Scan041
Date  14th August 1914 guessed
  
Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}9/L14814. Sheet. 3

jet of water running on to each brake drum, and with all four arrangements the test was satisfactory each one running for 15 minutes without failure. This proves that the expansion and heat are the only things which prevent this brake from being excellent.

The Ferodo is behaving splendidly so far under this very severe usage and has only worn down about 1/4" of pedal movement. We will be able to say more about the condition of the Ferodo later when it has been uncovered for examination. after further tests.

When very hot there is a slight expansion of the brake straps but not sufficient to do any harm or to take a permanent set. Tests 1, 2, 3 & 4 are being repeated but with the reduced leverage.
  
  


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