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).
Test report for the 11-EX New Phantom with a Weymann Body.
| Identifier | ExFiles\Box 71\3\ scan0108 | |
| Date | 18th February 1926 | |
| COPY. CJ. AS. TEST REPORT - 11-EX. NEW PHANTOMCodename for PHANTOM I. WEYMANN BODY. Consec. Day. | Agg. Mileage. | Total Running Hours. | Average Speed. | Date. 50 | 8939 | 319 5/60 | 30.4 | 18.2.26. MILEAGE. Start. | Finish. | Days. 7880 | 8017 | 137 PETROL. Start. | Added. | Finish. | Used. 20 | - | 7½ | 12½ Oil added. | Oil M.P.G. | Petrol M.P.G. | Running Hrs. ✓ | ✓ | 11.0 | 4½ Route, condition etc. involuntary stops. adjustments, work done. remarks on running, etc. Derby to London and to H.J. Mulliner on 19.2.26, where speedometer will be changed. Drivers W. Richards. CWB. | ||