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).
Extract discussing the performance of Claudel-Hobson carburetters, particularly regarding air intake and suction pipe length.
| Identifier | ExFiles\Box 121\3\ scan0030 | |
| Date | 25th May 1916 | |
| R.R. A 936 (400 T) (S.C. 520. 15-2-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1546. 5 EXTRACT FROM R8/IB25515 of MAY 25th, 1916. RE X.1452 - CLAUDEL-HOBSON CARBURETTERS. I do not understand what you mean by saying an alternative scheme is to use the standard Claudel carburetter. Does the standard Claudel carburetter work without heated air without freezing up, providing that the induction pipe is water jacketed after passing the carburetter? I have no intention of suggesting that the R.R. carburetter should be used on the job unless the Claudels do not give satis- faction. There is no doubt that where the suction through the carburetter is intermittent, the length of the suction pipe to the carburetter is an important matter, but where there are 6 cylinders drawing from it and the current of air is practically constant, the length of the suction pipe ought not to make any material difference providing it has sufficient area to prevent fall of pressure from fluid resistance, but one would think you could easily test this in a temporary way. | ||