Request for parts and instructions to upgrade an engine for improved performance.
| Identifier | ExFiles\Box 109\5\ scan0115 | |
| Date | 20th February 1939 | |
| 664 Mx. {John H Maddocks - Chief Proving Officer} from Rm. {William Robotham - Chief Engineer} c. HPS. {Horace Percy Smith - Experimental Factory Mgr} c. LA. {L. A. Archer} c. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} Rm {William Robotham - Chief Engineer} 1/R.20.2.39. Sg. {Arthur F. Sidgreaves - MD} is sending his car in here in a week's time to have an engine fitted up with the parts giving improved performance reported in our Rm {William Robotham - Chief Engineer} 8/MH. {M. Huckerby} 8.2.39. - in file 600. The pieces required are:- A set of raised crown pistons giving 6:1 c.r. Bentley Camshaft, and New Type Exhaust System. If possible, we should like to fit 3 R.R. raised crown pistons and 3 Aerolite. We should also like to fit a cylinder block with short inserts to get a figure of merit for cylinder bore wear. Will Swdl. {Len H. Swindell} please instruct the necessary parts if these are not already available. We suggest that as this car has previously been dealt with by Mx. {John H Maddocks - Chief Proving Officer} and the Test Dept., this practice should be continued. The car will be available on Monday, February 27th, for ten days. Rm. {William Robotham - Chief Engineer} | ||
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).