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).
Standardisation of rear engine suspension using spring steel dual plates and diabolo rubber buffers to dampen engine vibrations.
| Identifier | ExFiles\Box 14\5\ Scan015 | |
| Date | 23th March 1928 | |
| RR 755 REVISED (10H) (DE 649 9-12-26) BM. 2/1187. COMPLETED 10.5.28 STANDARDISATION of CHASSIS PARTS. Date 23.3.28 Reference: X7005 Description of Parts. REAR ENGINE SUSPENSION - USING 19 SWG SPRING STEEL DUAL PLATES & DIABOLO RUBBER BUFFERS. Origin. Scheme to damp out high speed engine vibrations. Experimental Test Report. Fitted to 15-EX and ran 10,000 miles in France. Run 100 hrs. on the bumping test without failure. Road Test Report. Run 10,000 miles in France. Engine very free from high speed vibration. Suspension remained sound and in good condition. Fitted to 14-EX and 10-EX with satisfactory results. Drawing No. F.78114 Lec. 2487 Part List A [X] Scrap and replace at all costs, including Chassis already delivered to Customers. B [ ] Scrap and replace on Chassis in Works. C [ ] Scrap present stock and replace on all Chassis not yet handed to test. D [ ] Use existing stock Alteration effective on future Chassis. Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. £2-16-6 Cost of New Part. £4-7-0 Difference per Car. £1-10-6 Increase Cost of Parts in Works which will be scrapped if commenced on:- Series............£.......... Series............£.......... Series............£.......... Signature from Cost Dept. that above is correct. GRL 9/4/28 INITIAL | DATE | REMARKS BJ. | 10.5.28 | agreed BJ R. {Sir Henry Royce} | 26.3.28 | Agreed. FHR. WOR. {Arthur Wormald - General Works Manager} | 24.3.28 | Agreed. Wor. {Arthur Wormald - General Works Manager} RG. {Mr Rowledge} | 26.3.28 | Agreed. RG. {Mr Rowledge} DA. {Bernard Day - Chassis Design} | 26.3.28 | Agreed. Da. {Bernard Day - Chassis Design} BY. {R.W. Bailey - Chief Engineer} | 26.3.28 | Agreed. BY. {R.W. Bailey - Chief Engineer} EP. {G. Eric Platford - Chief Quality Engineer} | 24.3.28 | Should like demonstration. Effect of fixing on 9-EX - now rough on retard. EP. {G. Eric Platford - Chief Quality Engineer} E. {Mr Elliott - Chief Engineer} | 28.3.28 | Assume that the front engine dampers are retained. Agreed. E. {Mr Elliott - Chief Engineer} PN. {Mr Northey} CWB. | 10.5.28 | We have had no experience with this device on a standard car. Provided Experimental Dep't: officials are satisfied that no disadvantages follow its adoption. we agree. PN. {Mr Northey} CWB. Hs. {Lord Ernest Hives - Chair} | 23.3.28 | Agreed. Hs. {Lord Ernest Hives - Chair} | ||