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).
Argument for a single carburetter design over S.U. and down-draught types, citing reliability and safety.
| Identifier | ExFiles\Box 31\4\ Scan111 | |
| Date | 10th November 1931 | |
| EXTRACT FROM: X1487. Hs.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce} By.{R.W. Bailey - Chief Engineer} ) CAR DESIGN WORK. R.2/M.10.11.31. X5080 X7080 X1487 C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} CARBURETTER. We are now all agreed that the single carburetter is the best for our work, and that although the S.U. is good in the horizontal form it still lacks many of the features which we understand you, RM.{William Robotham - Chief Engineer}, and LOV.{Mr Lovesey}, have found to be needed for the best results - i.e. (1) emulsion jet, (2) throttle edge carburation - which have for some time been thought necessary for good distribution and consistent slow running. In the past the S.U. has not been very lasting in results, I believe owing to the petrol needle wearing. In our scheme the needle will never touch the sides of the restriction passage, and the conditions at low and moderate speeds will be the same as a fixed jet carburetter. We are convinced that down draught and other forms are not as safe as up draught in connection with the risk of petrol in the cylinders. R.{Sir Henry Royce} | ||