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).
Comparison of the Standard B.V., Standard Wraith, and new Duplex systems for performance and fuel economy.
| Identifier | ExFiles\Box 122\4\ scan0233 | |
| Date | 14th June 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}8/MH.{M. Huckerby}14.6.39. The three systems should be compared, therefore, in performance and fuel economy. (a) Std. B.V. system. (b) Std. Wraith system. (c) New Duplex system. Note. The latter, after having obtained the correct road setting. when this is done careful note should be made of the low speed build up as associated with the straight eight system. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} | ||