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 for a starter motor, plotting efficiency, voltage, amperage, horsepower, and torque against RPM.
| Identifier | ExFiles\Box 61b\3\ scan0025 | |
| Date | 28th December 1914 | |
| X. 3175 WOR{Arthur Wormald - General Works Manager}/EH/C.281214 STARTER MOTOR BRAKE EFFICIENCY Graph Curves: EFFICIENCY H.P. DELIVERED TO ENGINE VOLTS ELECTRICAL H.P. DELIVERED TO MOTOR AMPERES B.H.P. .55 max Stamp: DERBY 31 MAR/1918 Y-Axes (bottom to top): EFFICIENCY VOLTAGE AMPERES HORSE POWER TORQUE (POUND INCHES) X-Axis (RPM): 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400, 2600, 2800, 3000 | ||