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 showing various output curves for a 20 HP dynamo.
| Identifier | ExFiles\Box 59\1\ Scan102 | |
| Date | 1st January 1927 guessed | |
| 20 H.P. REPRESENTATIVE OUTPUT CURVE OF STANDARD 20 H.P. DYNAMO AT 80°C. SPECIFIED CURVE OF OUTPUT REQUIREMENTS FOR 20 H.P. DYNAMO CURVE OF OUTPUT AT 80°C AS REDUCED BY RESISTANCE INSERTED BY AUTO-SWITCH. AMPERE OUTPUT. APPROX: OPERATING VOLTAGE. DYNAMO R.P.M. CHASSIS M.P.H. 11/50 AXLE, 31.4" DIA. TYRES. | ||