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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).
Comparing two direct braking schemes, for the rear axle only versus all four wheels.

Identifier  ExFiles\Box 73\3\  scan0014
Date  1st May 1924
  
R3/M1.5.24. -2- Contd.

(1) Direct foot to rear axle only-
present 40/50 leverage. } This gives
(2) Direct foot to 4 wheels - half } equal clearances.
present 40/50 leverage. }

to see which scheme gives the better direct braking. I am
hoping to see these temporarily fitted during the first few
days in May. at WW.


R.{Sir Henry Royce}
  
  


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