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 Phantom's HP curve and brake performance compared to other models.
| Identifier | ExFiles\Box 69\4\ scan0303 | |
| Date | 30th November 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF: Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/LG30.11.25. The standard Phantom is represented by a car with a H.P. curve which is a little below the average however. Graphs IV. and V.{VIENNA} We consider that the brakes on 10-EX are very good average Phantom brakes. Those on 98-NK (the car previously tested) were rather too efficient, the steering was liable to take charge. Graph V.{VIENNA} once again emphasizes the selective application which can be produced with the RR. servo motor and the consistent results consequently obtained. Hs{Lord Ernest Hives - Chair}/W. A.{Mr Adams} Robotham. | ||