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).
Changing the insulation material for a main switch from vulcasbestos to micanite.
| Identifier | WestWitteringFiles\D\April1920\ Scan22 | |
| Date | 19th April 1920 | |
| To EFC. from R.{Sir Henry Royce} Copy to CJ. BN.{W.O. Bentley / Mr Barrington} ORIGINAL R5/G15/4/20. 4 X.3034 RE MAIN SWITCH - EFC3/T10/4/20. I quite agree to changing the insulation from vulc-asbestos to micanite if there is any sign of the vulcasbestos shrinking. It is usually considered that vulcasbestos is fairly permanent, but this can be easily tested by heating the switch artificially. R.{Sir Henry Royce} D 19 APR 1920 | ||