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).
Calculations of flux per pole for an old type R.R. starter motor.
| Identifier | ExFiles\Box 34\3\ Scan166 | |
| Date | 15th December 1920 | |
| X. 2642 15.12.20. X.2642 - CALCULATIONS OF FLUX PER POLE FOR OLD TYPE R.R. Starter Motor. From torque:- φ = (T x b x 10^8) / (1.41 x PZ C) = (62 x 2 x 10^8) / (1.41 x 4 x 90 x 118) = 207,000 lines. From E.M.F:- Amperes 118, Volts at 1500 R.P.M. = 9.3 φ = (60 x 10^8 x 2 x 9.3) / (90 x 1500 x 4) = 206,500. EFC. | ||