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).
Instruction sheet detailing specifications for an electrical winding and armature assembly.

Identifier  ExFiles\Box 23\2\  Scan062
Date  24th January 1919
  
RR.300 (120B) (SF 349 24-1-19) MP 200552
91217
ROLLS-ROYCE LIMITED.
INSTRUCTIONS.
Gd 4th 180.
To E.F.C.
Order No. P.A. 23.
Customer's No.
Re X
2 in parallel.
(e). Resistance of field circuit = .00608 Ohms at 17°C.
5.
(a). Type of winding Prog Wave.
(b) Number of slots. 25.
(f). Number of com. bars. 25.
(J). Step of winding. 6 coil. 7 com. Unobtainable
(K). Resistance of armature. = .001385 ohms at 19°C. taken from segs. 1 and 6, and 1 and 7.
(l). Position of brushes. In neutral position.
6.
(a). Com. dia. = 1.790".
(b). Com. length. = .969".
(C). Brush contact area = .374 x .732 = .274 sq ins per brush
(d). Brushes are marked SPEER. KKKK. and are similar to Morganite CM3.
Signed C.A.P.
This Sheet must be filed on completion of the work.
  
  


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