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 performance curves for a 20 HP dynamo, showing ampere and voltage output against RPM.
| Identifier | ExFiles\Box 68\4\ scan0301 | |
| Date | 1st July 1928 | |
| AMPERE OUTPUT APPROX: OPERATING VOLTAGE DYNAMO R.P.M. CHASSIS M.P.H. 11/50 AXLE, 31 . 4" DIA: TYRES. Top Curve: M (High Output Armature) 7° 126° July '28 Annotations near top curve: 14° 125° at 80°c, 11° 124° at 80°c, 7° 126° 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. OUTPUT = 20 H.P. R.R DYNAMO No. 627. WITH R.R. No 1 ARMATURE AND ECCENTRICALLY GROUND POLE-PIECES. 50/H/6-28 | ||