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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).
Page concerning gearbox lubrication on gradients.

Identifier  ExFiles\Box 179b\2\  img201
Date  12th December 1932
  
-2- Ee/JT.L.S/JA.12.12.32. Chat'd.{John DeLooze - Company Secretary}

At gradients up to 1 in 4 1/2 oil is thrown by the sliding 2nd. speed pinion on-to the servo worm.
At steeper gradients lubrication is again by drip from the lid.{A. J. Lidsey}

The new gearbox is therefore no worse off for lubrication than the present one.

Hs{Lord Ernest Hives - Chair} GRY.{Shadwell Grylls}
  
  


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