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 chassis parts for a modified exhaust silencer to reduce noise.
| Identifier | ExFiles\Box 66\2\ scan0134 | |
| Date | 2nd December 1925 | |
| RR 755 (10M) (SL391 2-11-23) MP 281297 Hs {Lord Ernest Hives - Chair} 48230 COMPLETED 10.12.25 STANDARDISATION of CHASSIS PARTS. Date 2.12.25. Description of Parts. MODIFIED EXHAUST SILENCER. Origin. To reduce amount of exhaust noise. Experimental Test Report. The dimensions of the silencer are the same as the present standard. The modification consists of alteration to baffles. See report. Road Test Report. Fitted to 44-PK and 95-NK - run 900 miles. A slightly modified form of this silencer is running on 8-EX car in France (7,500 miles) and London trials cars. Weight of Old Part. Cost of Old Part. £ 1-7-0 Weight of New Part. Cost of New Part. £ 1-8-6 Difference per Car. Difference per Car. £ 1-1-6 increase Signature of Mr. De LOOZE that above is correct. [Signature] 2/12/25 SIGNATURES | DATE | REMARKS MR. JOHNSON | | 10 Dec Agreed [signature] MR. B. JOHNSON | 10.12.25 | agreed F. {Mr Friese} Johnson M MR. ROYCE | 8.12.25 | Agreed. FHR. MR. WORMALD | 8.12.25 | Agreed. Wor. {Arthur Wormald - General Works Manager} MR. ROWLEDGE | 7.12.25 | Agreed. Rg. {Mr Rowledge} MR. DAY | 8.12.25 | Agreed. Da. {Bernard Day - Chassis Design} MR. BAILEY | 8.12.25 | Agreed. BY. {R.W. Bailey - Chief Engineer} MR. PLATFORD | 8.12.25 | Agreed, cannot also consideration be given to burning brake mechanism cover when using cutout. EP. {G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 8.12.25 | Agreed. E. {Mr Elliott - Chief Engineer} MR. NORTHEY | 8.12.25 | Agreed. PN. {Mr Northey} MR. HIVES | 9.12.25 | Agreed. E. {Mr Elliott - Chief Engineer} Hives. Box: X No. 8230 Drawing No. Part List A 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 Cost of Parts in Works which will be scrapped if commenced on:- Series.......... £ .......... Series.......... £ .......... Series.......... £ .......... Stamp: DRAFT Stamp: RECEIVED DEC 10 1925 | ||