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 starter motor brake efficiency against amperes, plotting voltage, torque, and flux per pole.
| Identifier | ExFiles\Box 34\3\ Scan169 | |
| Date | 7th October 1912 | |
| STARTER MOTOR BRAKE EFFICIENCY VOLTAGE TORQUE (POUND - INCHES) FLUX PER POLE (KILOLINES) VOLTS AMPERES FB/42 7.10.12 T E 0 2 4 6 8 10 12 14 16 18 20 0 10 20 30 40 50 60 70 80 90 100 0 50 100 150 200 250 300 350 400 450 500 0 20 40 60 80 100 120 140 160 180 200 220 | ||