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 Lucas chassis lighting dynamos.
| Identifier | WestWitteringFiles\D\March1920\ Scan33 | |
| Date | 4th March 1920 | |
| X.294. OBSERVATIONS of CUTTING IN SPEEDS of CHASSIS LIGHTING DYNAMOS: I. LUCAS DYNAMOS: X.3014. Date. | Dynamo. | Temperature. | Speed. R.P.M. | E.M.F. Volts. | Remarks. ---|---|---|---|---|--- 6.5.19. | E.575 First expl. machine with straight slotted armature. | Cold. | 655 | 13.0 | (Curves D.{John DeLooze - Company Secretary} (Max. out-put 12.5 amperes. | | Hot. | 725 | 13.6 | 5.5.19. | Ditto. | Hot. | 720 | 13.5 | Curve B. 2/20. | E.575 Expl. dynamo with skewed slotted armature. | Cold. | 625 | 12.6 | | | Hot. | 690 | 13.55 | 27.2.20 | E.575 No.97 Skewed slots | Cold 18°C | 600 | 12.3 | Highest temperature reached. | | Hot 73°C | 680 | 12.9 | 28.2.20 | E.575 No.97 | Cold 14°C. | 590 | 12.4 | After standing all night. 1.3.20. | E.575 No.402 skewed slots | Cold 15°C. | 595 | 12.35 | ditto. 4.3.20. | E.575 No.402. | Cold 18°C. | 610 | 12.3 | After standing several hours. | | Hot. 52°C | 710 | 13.4 | (Faint text on left margin): R P.335 A 100 T&S F 840 8-19 C. 2400. | ||