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 detailing the results of a starter motor brake efficiency test for a 45 slot armature.
| Identifier | ExFiles\Box 34\3\ Scan139 | |
| Date | 22th March 1913 guessed | |
| R.R STARTER MOTOR BRAKE EFFICIENCY TEST X.2642 (45 SLOT ARMATURE) AXES LABELS: ELECTRICAL H.P EFFICIENCY VOLTAGE AMPERES B.H.P R.P.M TORQUE (POUND INCHES) GRAPH LINE LABELS: EFFICIENCY VOLTAGE AMPERES R.P.M B.H.P ELECTRICAL H.P SCALES: ELECTRICAL H.P: 0 to 4.0 EFFICIENCY: 0 to 1.0 VOLTAGE: 0 to 20 AMPERES: 0 to 250 B.H.P: 0 to 2.0 R.P.M: 0 to 3000 TORQUE (POUND INCHES): 0 to 100 | ||