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).
Minutes of a meeting discussing the carburetter and induction system for the large bore 20/25 engine.
| Identifier | ExFiles\Box 30\1\ Scan276 | |
| Date | 12th December 1935 | |
| [Handwritten: LJW] Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Salt. E/JNR.{Charles L. Jenner} E/Lid.{A. J. Lidsey}5/HP.12.12.35. E/Psn. E/McS. MINUTES OF A MEETING TO DISCUSS THE PRESENT POSITION WITH REGARD TO THE CARBURETTER AND INDUCTION SYSTEM FOR THE LARGE BORE 20/25 ENGINE. Present:- E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Salt. E/Jnr.{Charles L. Jenner} E/Psn. E/McS. Mr Fisher (Stromberg). E/Lid.{A. J. Lidsey} (1) As a result of a discussion of the general position it was agreed that the development had not proceeded sufficiently far to warrant introducing the big bore engine on "L" series - the cars for this series are due on test 12 weeks from now, and there are still some problems to be settled up on the induction system. (2) Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} was asked to complete a leak test on the Stromberg carburetter. [Handwritten annotation: X Salt] (3) Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} was asked to carry out tests to determine which is the best position for the non return valve in the induction pipe drain (i.e. at the induction pipe or at the end of a long drain pipe). (4) The patterns for the induction system to LeC.4780,which are being made in Leicester (and which will be finished in a week's time) should go ahead without alteration in order that the induction system can be used on the turbulent type cylinder head. Any mods. found necessary to the draining scheme will have to be incorporated later. (5) Carburetter choke valve must either be spring controlled (i.e. not positively closed) or if positively closed must have an auxiliary spring loaded release valve incorporated in it. (6) An insulating washer .625" thick is required between the carburetters and inlet pipe. This washer is obtainable from Coopers Mechanical Joints Limited. (7) Design require a correct model of the carburetter which it is proposed to use in order to make a final design for the throttle, and choke controls. This | ||