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 output curves for a 20 HP dynamo.
| Identifier | ExFiles\Box 60\1\ Scan157 | |
| Date | 1st July 1928 | |
| M (High Output Armature) 7° 126° July '28 N (Inter-Output) 7½° 123° at 80°C 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 20 H.P. DYNAMO OUTPUT CURVES. AMPERE OUTPUT APPROX: OPERATING VOLTAGE DYNAMO R.P.M. CHASSIS M.P.H. 11/50 AXLE. 31.4" DIA: TYRES VOLTAGE AXIS VALUES: 14.0, 14.4, 14.8, 15.2, 15.55, 15.9, 16.2, 16.5, 16.8, 17.05, 17.3, 17.5, 17.7, 17.9, 18.1, 18.3, 18.5, 18.7 AMPERE AXIS VALUES: 0 to 17 DYNAMO R.P.M. AXIS VALUES: 0 to 4000 CHASSIS M.P.H. AXIS VALUES: 0 to 55 | ||