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).
Redesign of the petrol pump to a fabric diaphragm model due to high costs.
| Identifier | ExFiles\Box 106\2\ scan0058 | |
| Date | 5th April 1931 | |
| Hs.{Lord Ernest Hives - Chair} } FROM R & E.{Mr Elliott - Chief Engineer} Ev.{Ivan Evernden - coachwork} } c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. Hv. RHC.{R. H. Coverley - Production Engineer} X5460 R1/M4. 5. 31. X.7460 X.5460 X.2677. PETROL PUMP. In consequence of the high cost of sylphon tubes we have altered our pump design to a fabric diaphragm, hoping that it will prove quite reliable for 2 or 3 years, and our design is simpler than A.C., which has a curious drag link of unnecessary complication. It is especially designed to suit P.2. engine and will be arranged in perhaps a better position in J.1 and 3. For a long time I have favoured a pump instead of the autovac, which is now more complicated and costly. The pump giving a constant head and a large reserve of capacity has made the problem still simpler and more satisfactory. We will work at these designs until they are as efficient in cost/value as others, and the Works will say whether they will make or buy. If they can make at say cost to buy, plus 25%, and contribute something towards charges, say 150% on time and 20% on material, then it would be better for Derby to make. All purchased parts or materials should carry 20% of charges for buying etc. R.{Sir Henry Royce} | ||