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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).
Comparison of gearbox backlash between a Rover and a Bentley 11.

Identifier  ExFiles\Box 136\4\  scan0231
Date  25th August 1938
  
Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}
--------
1153
BY/Ald.{F. Allwood - Experimental Design}1/G.25.8.38.

BACKLASH IN GEARBOX.
--------------------

We have worked out the backlash in the Rover gearbox from the detail drawings supplied, with the following results :-

Rover 3rd Speed.
Min. 0.015
Max. .044

Bentley 11 3rd Speed.
Min. 0.011
Max. .020

Both of the above represent movement at a 1.000 rad. on the 1st motion shaft, the 3rd motion shaft being held stationary. The backlash due to the gear teeth is omitted in both sets of figures, since no data is given on the Rover drawings.

ael
BY/Ald.{F. Allwood - Experimental Design}
  
  


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