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 conference regarding production instructions for the 3¼ Litre Bentley.
| Identifier | ExFiles\Box 30\2\ Scan208 | |
| Date | 28th April 1933 | |
| Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} X2924 BY/SS{S. Smith}1/J.1.5.33. 3¼ LITRE BENTLEY. MINUTES OF CONFERENCE HELD - APRIL 28th 1933. (Present Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Rm.{William Robotham - Chief Engineer} BY/SS.{S. Smith}) (1) PRODUCTION INSTRUCTIONS. Are modified as follows:- 200 sets of approved material to be ordered. 115 sets machined. 15 sets out of the 115 to be assembled urgently. In order to complete the 15 chassis, it was agreed to release material for outstanding sections to the latest experimental specification. (2) PISTON. 25 H.P. Piston and Gudgeon Pin to be superseded by the strengthened type with longer skirt and Gudgeon Pin with Thrust Pads to LeC.3447 and LeC.3456. D.O. refer back to old details for fit of thrust pads in the gudgeon pin. (3) CYLINDER HEAD. Compression ratio 6.35 to 1. Machine around valve guides suitable for fitting double valve springs if required to LeC.3297. D.O. give plus and minus limits for the combustion chamber capacity. This volume will be given by the Experimental Dept. Water (4) VALVES & FITTINGS. Valves, valve springs, spring washers, wedges etc. to remain as instructed for 115 sets. (5) INDUCTION HOT SPOT HEATING. 15 sets only for Exhaust Heating to the present production specification should be released, as it is proposed to change over from exhaust to Water Heating. The Induction Pipes for these 15 sets should be to E.59292 & 3, modified to EX.10401. D.O. should hold up the following complete sections:- Induction Pipes. Carburetter Air Cleaner Carburetter. Exhaust Heating System. Ignition Wires. Water Connections. The cylinder head front cover should also be held up, but for the present we use the standard 25 H.P. Water Pump and retain the three exhaust heating passages in the cylinder head. Cont'd.{John DeLooze - Company Secretary} | ||