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 suitability of the Claudel Hobson carburetter for car and aero engines.
| Identifier | ExFiles\Box 121\3\ scan0010 | |
| Date | 15th January 1915 | |
| C O P Y. 16/115 To Wor.{Arthur Wormald - General Works Manager} for EH from R.{Sir Henry Royce} Copy to J.{Mr Johnson W.M.} " " E.{Mr Elliott - Chief Engineer} " " Na.{Mr Nadin} COPY. /IB15115. January 15th. 1915. Re Claudel Hobson Carburetter. RW52 Wor{Arthur Wormald - General Works Manager}/EH2/D12115. I have received your sheet with reference to the Claudel Hobson carburetter. Evidently for our car engine a throat of 32 m/m is on the large side for 80 HP, so that a very small increase on this size would be large enough for the 100 HP that we have got to get from each six cylinders of the aero engine.x Will Mr Eliott go on with the piping arrangements suitable for the Claudel Hobson carburetter, having a throat of about 36 m/m.{Mr Moon / Mr Moore} I am assuming that the Claudel Hobson carburetter was put in the usual position of our carburetter on the standard engine, and the increase of horse power is undoubtedly due to the small resistance of the carburetter, which is quite all right for high speed running, but quite useless for a big range of speed, and I quite agree with you that so far we have not seen a better carburetter than our own for car work. F.H.R. x i.e. for a single carburetter per six cylinders, let each carburetter be entirely independent i.e. not jointed together or with only one float chamber. F.H.R. | ||