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).
Vehicle performance, detailing petrol and oil consumption, and the specifics of tyre wear and type.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan068 | |
| Date | 28th April 1926 guessed | |
| - 10 - Total average petrol consumption ------17.84 M.P.G. " " Oil " --------960.42 M.P.G. Weather conditions during continuation of test has been cold and wet TYRES. Dunlop cord extra heavy wired type 5 1/4 for 21" rims. Pressures. Front 30 Lbs ,Rear 40 Lbs per sq. inch. Average life of front tyres. 8477 miles. " " " rear tyres 4500 miles. The tread of rear tyres quickly wears off. We do not think this type of tread wears as well as the ARROW type; they are also more noisy. [Handwritten annotation 'means' is above the words 'wears off']. G.W.Hancock. | ||