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).
Responding to a query about 'SS' ignition wire tubing and materials.
| Identifier | WestWitteringFiles\T\2July1928-December1928\ Scan174 | |
| Date | 26th October 1928 | |
| EFC. FROM R.{Sir Henry Royce} ORIGINAL 'SS{S. Smith}' IGNITION WIRE TUBING. R4/M26.10.28. X3914 . x4473 In reply to your EFC2/T241028: (1) We have done the best we can with the space and arrangement of pipes. (2) There is no need for metal tubes for magneto ignition; better without we think (i.e. for slow speed firing.) (3) We do not suggest cancelling metal tubes for battery ignition because the potential can go so very high at low speeds and suffer from mutual induction. (4) Vulcanite tubes are quite out-of-date. Bakelite or some more heat-proof material should be used. (5) If we experience some trouble for trials cars we can probably screen against the heat. R.{Sir Henry Royce} | ||