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 of cutting-in speeds for Smith (T & M) chassis lighting dynamos.
| Identifier | ExFiles\Box 3\5\ 05-page165 | |
| Date | 4th March 1920 | |
| X-295 4.3.20. X. 294. OBSERVATIONS of CUTTING IN SPEEDS of CHASSIS LIGHTING DYNAMOS. II SMITH (T & M) DYNAMOS. X. 295. 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, 30.6.19. | A | Hot { | 570, 580 | 13.5, 13.5 | B Curves. D.{John DeLooze - Company Secretary} Curves. 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. "17/5/20 | 2D/1 | 17°C | 470 | 13.1 | "17/5/20 | 2D/2 | 15°C | 430 | 12.2 | | ||