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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).
The Goshawk 11 crankshaft pinion spring drive, stating that work on Spring Drive LeC.1449 should cease as it is superseded by scheme LeC.1458 with a slipper flywheel.

Identifier  ExFiles\Box 79\3\  scan0134
Date  8th October 1921
  
To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer}
c. to Hs.{Lord Ernest Hives - Chair}

X4222

E1/G8.10.21.

GOSHAWK 11. CRANKSHAFT PINION SPRING DRIVE. X.4222
X.4221

It should be understood that nothing more should be done with Spring Drive LeC.1449 now that we have a scheme LeC.1458 fitted with slipper flywheel.

E.{Mr Elliott - Chief Engineer}
  
  


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