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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).
Test results for the Wraith II gearbox support bracket 'Silent Bloc' bush.

Identifier  ExFiles\Box 8\7\  07-page20
Date  22th August 1937
  
6227g
RM{William Robotham - Chief Engineer}/CRY J R
WRAITH II GEAR BOX SUPPORT BRACKET 22-8-37

NSCH 4862.

Herewith the results of the tests requested in RM{William Robotham - Chief Engineer}/WYM.{G. Harold Whyman - Experimental Manager}S/JH 18.2.37 from which it will be seen that this type of "Silent Bloc" bush is considerably stiffer about the perpendicular axis (b) than about the normal axis (a) - as anticipated.

the 25/30 HP mounting tests will follow as soon as possible.

WYM{G. Harold Whyman - Experimental Manager}
M Bell
  
  


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