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).
Electrical test results for a post-war R. Bosch electrical system's dynamo performance.
| Identifier | WestWitteringFiles\J\January1923\ Scan7 | |
| Date | 3rd January 1923 | |
| ORIGINAL To R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} from EFC. c. CJ. & PH. c. Ry. & EP.{G. Eric Platford - Chief Quality Engineer} c. Rg.{Mr Rowledge} & Da.{Bernard Day - Chassis Design} X.4562 - POST WAR R.{Sir Henry Royce} BOSCH ELECTRICAL SYSTEM Further to our EFC1/T20.12.22, we have now made a number of electrical tests on the units comprising this system. Performance with Dynamo as plain shunt wound Machine. (a) Open circuit volt-speed performance - cold. The machine puts up 10 volts at 370 r.p.m. 13.4 " " 420 r.p.m.(cold bal. speed) 17 " " 520 r.p.m. These speeds are about 50 r.p.m. higher than for the pre-War Bosch machine (two pole) and also higher than some other machines tested, e.g. Smith and Rotax AT.12. of similar size. (b) Open circuit volt-speed performance - hot (70°C) The machine puts up 10 volts at 395 r.p.m. 13.6 " " at 470 r.p.m. (hot balancing speed) 17 " " at 545 r.p.m. The same remarks re other machines apply in this case, as in the previous case. (c) Ampere output performance on scheduled volt-ampere characteristic (cold condition). The ampere output rises to 8 at 555 r.p.m. and to 14 at 680 r.p.m. (d) As (c) but in hot condition. The ampere output rises to 8 at 635 r.p.m. and to 14 at 835 r.p.m. Contd. | ||