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).
List of practice and race times for various vehicle maintenance changes.
| Identifier | ExFiles\Box 90a\1\ Scan031 | |
| Date | 1st July 1934 guessed | |
| Practice times for changes. 6. spark plugs. - 4 mins. 2 wheels & petrol. 1 min 06 secs. 4 wheels & petrol. 1 min 55 secs. 1 valve spring 6 mins 0 secs. Race times for changes: 4 wheels & petrol (1st stop). 2 mins 30 secs. 4 wheels & petrol (2nd stop). 2 mins 30 secs. | ||