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).
Design, materials, and reliability of carburetter fuel filters.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan148 | |
| Date | 11th August 1920 | |
| R.R. 235A (100 T) (S.H. 159, 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 R (2) carburetter, which should be the same because it is only asked to pass already cleaned fuel. The gauze should be benzol (sulphur) proof - (monel metal.) Such filters should be usable for 20,000 miles, at the end of which time spare filters should be fitted with new gauzes, which latter should be supplied by us at near cost price, the reason for this being that fine gauze is impossible to clean thoroughly. Corrosion and stoppage therefore makes a filter unreliable. I have seen the memo. circulated by EP.{G. Eric Platford - Chief Quality Engineer} and I think it is impracticable, and should be withdrawn. I have always considered a stopped jet extremely easy to clean, (but rarely touch mine.) Is it not still so? But dirt and water should be prevented from getting to the jets. Formerly we had very little trouble except with corroded filters. Who was the author of the coarser gauze: not myself except in oil sumps. One New PhantomCodename for PHANTOM I car here has fine gauze in the carburetter, whereas Goshawk lll. here has coarse gauze, which is doing no good but stopping a small fly. Please send spare filters for each as the small brass stud is broken in the New PhantomCodename for PHANTOM I. It should have been in stainless, and had better be made one size larger. R.{Sir Henry Royce} | ||