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 brake efficiency test results for a starter motor with a 45 slot armature.
| Identifier | ExFiles\Box 34\3\ Scan138 | |
| Date | 19th March 1928 | |
| R.R STARTER MOTOR BRAKE EFFICIENCY TEST X 2642 (45 SLOT ARMATURE) LABELS ON GRAPH: EFFICIENCY VOLTS ON TERMINALS ELECTRICAL H.P. DELIVERED TO MOTOR B.H.P. TORQUE AMPERES Y-AXIS LABELS: EFFICIENCY VOLTAGE AMPERES HORSE POWER TORQUE (POUND INCHES) X-AXIS LABEL: SPEED (R.P.M) STAMPED TEXT: ROLLS-ROYCE LIMITED AERO ENGINE DIV. LODGER DEPT. 19 MAR 1928 | ||