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).
Performance graph of a dynamo for a 20 HP chassis, plotting ampere output and operating voltage against dynamo RPM and chassis MPH.

Identifier  ExFiles\Box 165\6\  img243
Date  1st December 1929 guessed
  
AMPERE OUTPUT
APPROX. OPERATING VOLTAGE
18.7
18.5
18.3
18.1
17.9
17.7
17.5
17.3
17.05
16.8
16.5
16.2
15.9
15.55
15.2
14.8
14.4
14.0
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
P
20 H.P.
DYNAMO R.P.M.
200 400 600 800 1000 1200 1400 1600 1800
CHASSIS M.P.H. 11/50 AXLE
0 5 10 15 20 25
  
  


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