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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).
25-HP engine mounting, recommending an anchor stay to prevent propeller shaft pumping.

Identifier  ExFiles\Box 104\1\  scan0146
Date  24th April 1934
  
X5005
To Hs.{Lord Ernest Hives - Chair} from E/JNR.{Charles L. Jenner}
E/JNR.{Charles L. Jenner}1/HP.24.4.34.
c. RHC.{R. H. Coverley - Production Engineer}
re 25-HP. ENGINE MOUNTING.
With reference to the engine mounting which has the Terraplane rubbers, the engine should be held endways with an anchor stay from the gearbox to the crossmember.
This will prevent the front end of the propeller shaft from pumping.
We send you herewith scheme LeC.3885 showing the stay.
Print to RHC.{R. H. Coverley - Production Engineer}
E/JNR{Charles L. Jenner} C/.
  
  


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