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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).
Ignition options for the Goshawk I engine.

Identifier  ExFiles\Box 54\5\  Scan141
Date  1st February 1921
  
X3485
GENL D (DD-2-11 AM.H.2).T(m).A.2.S S
To HS.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce}
Copy to O.I. [Strikethrough]
E.W.C.
R10/G15/2/21.
X3485
RE "GOSHAWK I" - IGNITION.
X4275
X3481
I do not think it would be good to put on the Bosch (American) ignition until Clark has tested this. I should prefer to fit a set of Delco, but with a good magneto slave type of which will fire the engine at very slow speed, as the Watford or B.T.H. I do not see any object in fitting battery ignition. We do not want to spend any more on this model than enough to make just a few of these run well to compare with "Goshawk II" with its somewhat different construction.

R.{Sir Henry Royce} [Signature]
  
  


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