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).
Qualifying report on a 10,000-mile test for production car 12-EM, detailing top speed, fuel consumption, and a universal joint issue.
| Identifier | ExFiles\Box 53\4\ Scan050 | |
| Date | 11th December 1923 | |
| X4601 Hm.{Capt. W. Hallam - Head Repairs} c. Her. c. Hs.{Lord Ernest Hives - Chair} c. BY c. SFL c. Rg.{Mr Rowledge} EP{G. Eric Platford - Chief Quality Engineer}1/H11.12.23. re. 10,000 Miles Production Car. 12-EM. With reference to your memo Hn{F. C. Honeyman - Retail orders}1/EWS.12.23 re above, there are three points which I think require qualifying in this report:- 1. You state that EP{G. Eric Platford - Chief Quality Engineer} got 70 m.p.h. out of the car. This speed was obtained under favourable conditions, i.e. running slightly down hill. In the opposite direction, 55 m.p.h. only was obtained. 2. The petrol consumption was 15 m.p.g. average over the whole 10,000 miles. 3. I do not agree that the sphere universal joint was satisfactory, but showed distinct signs of the pins gauling in the bushes, as though short of lubricant at this spot. EP{G. Eric Platford - Chief Quality Engineer} | ||