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).
Explaining the decision to use a downdraught carburetter on the big bore 20/25 engine.
| Identifier | ExFiles\Box 20\9\ Scan061 | |
| Date | 21th December 1935 | |
| W/S - CX.{Major Len W. Cox - Advertising Manager} c. to Sg.{Arthur F. Sidgreaves - MD} X1033 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/KW.21.12.35. Re Stromberg Carburetters & Flooding. Replying to Cx.{Major Len W. Cox - Advertising Manager}6/KW.17.12.35, there is really no merit in a downdraught carburetter as such, except that it can easily be accommodated under the bonnet. When we came to the big bore 20/25 we could no longer take our mixture through the block. This meant that the carburetter had to be on the same side as the induction pipe, and we could not get good distribution without running into the bonnet side. We were therefore forced to the downdraught arrangement, if we were to use anything like the existing engine arrangement. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||