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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).
Instructing modifications to a 10-EX damper, specifying new spring loads and the effect of slack.

Identifier  ExFiles\Box 25\3\  Scan290
Date  29th November 1927
  
To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} 1634 Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}7/LG29.11.27.

10-EX DAMPER.

Will you please fit up 10-EX damper with the stronger driving springs (these should give 17-20 lbs. load at 17¾" radius when deflected to stops), and half the damping springs (this should give 9-10 lbs. load in friction at 17¾" radius). We calculate that slack to the extent of .5º on the splines of the driving plate will completely negative the effect of the damper.

Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}
  
  


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