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).
Observations on the cutting in speeds of chassis lighting dynamos, specifically II Smith (T & M) dynamos.
| Identifier | WestWitteringFiles\D\March1920\ Scan34 | |
| Date | 4th March 1920 | |
| X.294. OBSERVATIONS X.295. of CUTTING IN SPEEDS of CHASSIS LIGHTING DYNAMOS. II SMITH (T & M) DYNAMOS. Date. | Dynamo type. | Temperature. | Speed R.P.M. | E.M.F. Volts. | Remarks. ---------------------------------------------------------------------------------------------------------------- 12.5.19. | A | Cold { | | Hot. { | 500 585 575 | 12.4 13.6 13.2 | } Maximum out-put. hot 13.4 amperes. ---------------------------------------------------------------------------------------------------------------- 24.6.19 | A | Hot. { | 570 580 | 13.5 13.5 | B Curves . D.{John DeLooze - Company Secretary} Curves. 30.6.19. | | | | ---------------------------------------------------------------------------------------------------------------- 20.2.20. | A | Hot. | 565 | 13.4 | E.{Mr Elliott - Chief Engineer} Curve. ---------------------------------------------------------------------------------------------------------------- 23.2.20. | A | Cold. | 485 | 12.4 | After standing all night. ---------------------------------------------------------------------------------------------------------------- 4.3.20. | 2D. | Cold 12.5°C | | Hot 54°C. | 430 500 | 12.45 13.5 | After standing all night. RR 285 A (100 T) (S.F. 846 6-8-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2460. | ||