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).
Comparing the make-ratio speed curve of a new battery ignition contact breaker against an older model and competitor products.
| Identifier | ExFiles\Box 35\6\ scan 432 | |
| Date | 14th March 1928 | |
| To R.{Sir Henry Royce} from EFC. c. BJ. E.{Mr Elliott - Chief Engineer} c. EY. Wor.{Arthur Wormald - General Works Manager} X.8692 EFC5/T14.3.28. R.R. BATTERY IGNITION CONTACT BREAKER. Attached please find copy of make-ratio speed curve of the new R.R. battery ignition contact breaker with scrubbing action. It will be seen that this is even better than the similar curve for the old contact breaker, which we issued under cover of and reported in our EFC1/T5.4.24, copy of which we now attach for your convenience. The curve is equally good with the Delco-Remy and somewhat better than the similar curve for the U.S.A. Bosch contact breaker. EFC1/T5.4.24. attached. EFC. X8690 X4357 | ||