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).
The small percentage difference in petrol consumption between different tyre pressures.
| Identifier | WestWitteringFiles\K\June1923\ Scan38 | |
| Date | 1st July 1923 guessed | |
| contd :- -2- produces a correspondingly small percentage difference in the consumption. The difference in petrol consumption between tyres at 40 lbs. per sq.in. pressure and 50 lbs. per sq.in. pressure at ordinary touring speed, will obviously be very small. Hs{Lord Ernest Hives - Chair}/Fm. | ||