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 agreed test programme for carburetter performance on the Bentley V model.
| Identifier | ExFiles\Box 99\1\ scan0072 | |
| Date | 28th February 1941 | |
| 408. To Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} from Rm.{William Robotham - Chief Engineer} Copy to Rm{William Robotham - Chief Engineer}/CFS. Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden} Rm{William Robotham - Chief Engineer}/Fred Hallam Rm.{William Robotham - Chief Engineer}2/ET.28.2.41. CARBURETTER TESTS - BENTLEY V.{VIENNA} -------------------------------- Confirming the discussion held in Rm.{William Robotham - Chief Engineer}'s office on Friday February 28th, the following test programme was agreed upon. 8-B-V should be fitted with a production axle. 8-B-V and Devereux' car should then be utilised for the test. Performance will be measured by a side-by-side test on the two cars, and not by stop-watch. Devereux'car will be fitted with D.{John DeLooze - Company Secretary} needles, 8-B-V with the same. Each car in turn will have the dash-pot removed and effect on performance noticed. These tests will be conducted with an under-bonnet temperature of 40° C. If it is established that the dash-pot makes no difference, then the experiment should be repeated with a number of needles and a number of carburetters, to see if variations between pieces made to the same drawing can be detected on the road. If no variations can be detected between three sets of parts, then these should be taken to the works and measured, and working limits should be established. These limits should include jet size, stand pipe height, needle size, etc.. If differences between parts made to the same drawing can be detected on the road, then the pieces giving unsatisfactory performance will be considered outside manufacturing limits. If it is established that the needles without dash-pot are too weak, then LB.1 needles and standard B.II stand pipe should be introduced into the B.V carburetter as an alternative. Rm.{William Robotham - Chief Engineer} | ||