Rolls-Royce Archives
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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).
Experimental parts, including coils and a Bosch magneto, returned from St. Margaret's for analysis.

Identifier  ExFiles\Box 181\M11\  img076
Date  15th February 1915
  
R.R. 235 a (400 T) (S C. 556. 15-2-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546
-2-
E1/W151017.
Re - Experimental Parts returned from St.{Capt. P. R. Strong} Margaret's.
a view to getting the number of layers and turns of high tension and low tension wire, the guages of same, diameter of core, guage of core wire, particulars of insulation between layers, etc, etc, comprising full electrical information about each coil.
The COILS may then be re-built for further use.
Included in the above list you will also find the remaining portions of the Bosch magneto which burnt itself out on 49-CB. You have already in your possession the carcase of this magneto.
E.{Mr Elliott - Chief Engineer}
(CB)
  
  


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