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).
Test results and instructions for a new venturi-type centre piece for the Bentley induction system.
| Identifier | ExFiles\Box 85\4\ scan0031 | |
| Date | 24th May 1933 | |
| X230- To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT.24.5.33. BENTLEY INDUCTION SYSTEM. We have now completed our tests on the Bentley induction system, and find that by using a venturi type of centre piece, as shewn in V.1553, with a .500" central hole, we get the best results. The facts of this are, (a) improved slow running, (b) improved snap opening up, (c) improved low speed acceleration, (d) loss of 2% of maximum H.P., and (e) increase in induction pipe roar which we can get rid of by our intake silencer. We should like this induction pipe centre piece to be instructed for the first fifteen Bentleys. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||