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 comparing the RPM, current, and voltage drop of three different starter motors from Bosch, Bijur, and Westinghouse.
| Identifier | ExFiles\Box 50\2\ Scan122 | |
| Date | 26th April 1920 | |
| III R.P.M. CURRENT. OF 3 STARTER MOTORS By Ap 26'20 Y-AXIS LABELS: R.P.M. volts of battery Y-AXIS VALUES: 4000 | 12 3000 | 12 10 2000 | 8 6 1000 | 4 2 0 | 0 X-AXIS LABEL: Amps. consumed X-AXIS VALUES: 0, 100, 200, 300, 400, 500, 600 CURVE LABELS: BIJUR ASSUMED VOLTAGE DROP BOSCH ASSUMED VOLTAGE DROP WESTINGHOUSE ASSUMED VOLTAGE DROP WESTINGHOUSE R.P.M. AMPS. BIJUR R.P.M. AMPS. BOSCH R.P.M. AMPS. | ||