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).
Graph of output speed performance curves for a 48 coil dynamo under various conditions at 80°C.

Identifier  ExFiles\Box 62\3\  scan0140
Date  23th January 1931
  
AMPERE OUTPUT
OPERATING VOLTAGES
18.70
18.50
18.30
18.10
17.90
17.70
17.50
17.30
17.05
16.80
16.50
16.30
15.90
15.55
15.20
14.80
14.40
14.00
X. 6028. X. 6008. X. 6004.
OUTPUT SPEED PERFORMANCE CURVES AT 80°C.
TAKEN ON 48 COIL DYNAMO S.S. X. IN VARIOUS CONDITIONS, EACH CURVE BEING THE BEST OF A SERIES TAKEN WITH VARIOUS B ANGLES, FOR EACH CONDITION.
I MACHINE IN NORMAL CONDITION. 16° 130°
II WITH A FINER FIELD WINDING (20 S.W.G.) BUT OTHERWISE NORMAL. 16° 126°
III WITH AN INCREASED CONCENTRIC AIR GAP (.030") BUT OTHERWISE NORMAL. 18° 128°
IV WITH BOTH THE FINER FIELD WINDING AND THE INCREASED AIR GAP. 18° 126°
DYNAMO RPM
S.S. CHASSIS M.P.H. WITH 11/41 AXLE & 33.0" TYRE DIA.
40/50
C.A.P. 13.1.31.
E.F.C. 23.1.31.
  
  


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