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).
Preference for a 6-inch measurement over a 7-inch one for safety.
| Identifier | ExFiles\Box 81\1\ scan0021 | |
| Date | 27th May 1924 guessed | |
| z contd:- -2- I should prefer the safer policy of first using 6" as I fear 7" may be going too far. R.{Sir Henry Royce} | ||