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).
Performance report on a Zenith 48V1-2 carburetter, detailing acceleration improvements and identified faults.
| Identifier | ExFiles\Box 102\1\ scan0299 | |
| Date | 7th June 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Hs{Lord Ernest Hives - Chair}/CTS.{C. Trot Salt - Carburation} +508 Hs{Lord Ernest Hives - Chair}/GR.{George Ratcliffe}15/KW. 7.6.35. 18-G-IV. Zenith Carburetter, 48V1-2. Fitted to 18-G-IV with small capacity central water heated manifold and float chamber to the front of an engine. Acceleration up to 25 m.p.h. considerably improved and the flat spots at 28/33/35 m.p.h. cured. The chief faults at the moment are :- (1) Changeover from idle to main or progressive feeds during snap opening of 1/3 throttle from 4 m.p.h. (2) Consumption heavy at high average speeds. Hs{Lord Ernest Hives - Chair}/C. Ratcliffe. | ||