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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).
Query and reply regarding a generator's cut-in speed in relation to a proposed switching modification.

Identifier  ExFiles\Box 163\6\  img106
Date  23th December 1930
  
X6016
Extract from PN{Mr Northey}'s note in X.8780 ref. PN{Mr Northey}20/GM19.12.30. X8780 X5780 X3374

Am I right in assuming that the switching proposition you have proposed in the latter memo will enable the generator to cut-in at 15 or 16 mp.h. if desired?

---

Extract from our note in reply ref. EFC5/AD23.12.30.

The switching proposition proposed in our EPCL/AD12.12.30 does not affect the cutting in point of the dynamo except insofar as this is enabled to give full output and therefore earlier cutting in when the head lamps are not "on".
  
  


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