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 dynamo output curves for a 20 HP engine under different operating conditions.
| Identifier | ExFiles\Box 165\6\ img053 | |
| Date | 10th January 1927 guessed | |
| 20 H.P. AMPERE OUTPUT. APPROX. OPERATING VOLTAGE. REPRESENTATIVE OUTPUT CURVE OF STANDARD 20 H.P. DYNAMO AT 20°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. DYNAMO R.P.M. CHASSIS M.P.H. 11/50 AXLE, 31"x4" DIA. TYRES. | ||