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).
Proposed standardisation of the 40/50 starter motor components for a livelier start.
| Identifier | ExFiles\Box 168b\2\ img071 | |
| Date | 9th February 1923 | |
| To R & E.{Mr Elliott - Chief Engineer} from EFC. c. to CJ. & PH. c. to Py. & EP.{G. Eric Platford - Chief Quality Engineer} c. to Hc. & Hy.{Tom Haldenby - Plant Engineer} c. to Rg.{Mr Rowledge} ADS. X802 X4299 X664 X502 NE 40/50 STARTER MOTOR. With part reference to our note EFC1/T8.2.22 re Batteries, and to the proposed standardisation of field windings arranged two series two parallel for the M.R. standard starter motor, it was pointed out in our EFC5/T5.9.21 that little would be gained by the standardisation of this arrangement of windings, unless the battery and leads were altered in resistance accordingly. If, however, it is agreed to adopt the larger size batteries as urged in our EFC1/T8.2.22, we should at the same time standardise the two series two parallel arrangement, but it would be necessary, for the most approved arrangement, to increase the heavy conductor size considerably, say to at least 50% increased section. (Note:- The excessive length of heavy current cable renders this quite an appreciable proportion of the resistance of the whole circuit. Production can no doubt arrange that the three changes come on simultaneously. We should be glad for this course to be agreed to, as it will enable us to obtain a much more lively start on the 40/50 car. EFC. | ||