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).
Road test report detailing vehicle cooling, tyre wear on mountain roads, and daily running statistics.
| Identifier | ExFiles\Box 24\5\ Scan178 | |
| Date | 28th June 1929 | |
| fairly warm. There were 4 passengers in the car and PN{Mr Northey} driving. Bonnet and radiator shutters fully open. PN{Mr Northey} and Grylls went [crossed out: went] up the same mountain yesterday on the Invista car, and she boiled rather badly. The Dunlop Silent Tread tyres fitted to the rear wheels of the car, have already worn all the tread away and are not much use on mountain roads. Mileage run today - 138 miles. Petrol used. - 80 litres. Gen Hyman. 28-6-29. | ||