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).
Carburetter flooding issues and the evaluation of alternative petrol feed systems for Spectre and Bentley models.
| Identifier | ExFiles\Box 149\1\ scan0135 | |
| Date | 15th May 1935 | |
| To Sg.{Arthur F. Sidgreaves - MD} c. to Wor.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} X1263 HS{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}4/KW.15.5.35. SpectreCodename for Phantom III Petrol Feed. Sg.{Arthur F. Sidgreaves - MD}11/E.1.5.35. Since the original epidemic of flooding on the SpectreCodename for Phantom III carburetters, we have been immune from this trouble. We have therefore come to the conclusion that it was due to the fact that we were initially changing carburetters frequently and so getting dirt into the system on the float chamber side of the filter. We admit that the S.U. carburetters on the Bentley have suffered from flooding, but this we attribute more to the carburetter than to the petrol feed. S.U's have supplied us experimentally with float chambers with R.R. type of float mechanism, with a view to improving the situation. We think that the electric petrol pump is now reliable, though it has certainly had "teething" troubles; you will notice that we are circulating a Standardisation Sheet for improvements we have been running the last 12 months. It is almost impossible of course to use an autovac on anything except an updraught carburetter, so that an alternative had to be found for both SpectreCodename for Phantom III and Bentley. We explored the engine driven petrol pump on the Phantom and Peregrine, and discarded it in favour of the Bentley type of electrically operated pump. HS{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||