Standardisation of a piston with 5 narrow rings to replace the existing 3 narrow and 1 wide ring design.
| Identifier | ExFiles\Box 105\2\ scan0163 | |
| Date | 6th April 1927 | |
| RR 782 REVISED (10H) (DE 649 9-12-26) BM. 2/1187. Handwritten Top: x5040, Complete/ck {Mr Clark} 25.8.27, 57 STANDARDISATION of CHASSIS PARTS. Date 6.4.27 Description of Parts. PISTON WITH 5 NARROW RINGS - INSTEAD OF 3 NARROW AND ONE WIDE AS AT PRESENT. Origin. To improve design. Experimental Test Report. The present standard piston on 20 HP. has 3 rings .100" wide and one .187" wide. The proposal is to fit 5 rings .100" wide - this can be done without altering pin position of the top ring. See drg. E.53955. Road Test Report. Fitted to 9-G-111 - run 8800 miles. Fitted to 11-G-111 - run 3700 miles. These are an improvement as regards gas tightness and reduce the tendency for rings to squeak. [Right Side Box] X No. 5040 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 [Ticked] Scrap present stock and replace on all Chassis not yet handed to test. D Use existing stock Alteration effective on future Chassis. [Cost Section] Weight of Old Part. Cost of Old Part. £ 2. 4. 6d. Weight of New Part. Cost of New Part. £ 2. 10. 1d. Difference per Car. Difference per Car. £ 5. 7d. increase. Signature from Cost Dept. that above is correct. My/Rb. {R. Bowen} 12.4.27. [Cost of Parts Box] Cost of Parts in Works which will be scrapped if commenced on:- Series.........£....... Series.........£....... Series.........£....... [Approval Table] INITIAL | DATE | REMARKS BJ. | 25.5.27 | agreed R. {Sir Henry Royce} | 11.4.27 | Agreed. FHR. WOR. {Arthur Wormald - General Works Manager} | 6.4.27 | Agreed. Wor. {Arthur Wormald - General Works Manager} RG. {Mr Rowledge} | 13.4.27 | Agreed. RG. {Mr Rowledge} DA. {Bernard Day - Chassis Design} | 8.4.27 | Agreed. Da. {Bernard Day - Chassis Design} BY. {R.W. Bailey - Chief Engineer} | 7.4.27 | Agreed. BY. {R.W. Bailey - Chief Engineer} EP. {G. Eric Platford - Chief Quality Engineer} | 7.4.27 | Agreed. EP. {G. Eric Platford - Chief Quality Engineer} E. {Mr Elliott - Chief Engineer} | 11.4.27 | Agreed. E. {Mr Elliott - Chief Engineer} PN. {Mr Northey} | | CWB. | 5.5.27 | Agreed. CWB. Hs. {Lord Ernest Hives - Chair} | 6.4.27 | Agreed. Hs. {Lord Ernest Hives - Chair} Handwritten signature across RG {Mr Rowledge} , DA {Bernard Day - Chassis Design} , BY, EP {G. Eric Platford - Chief Quality Engineer} , E rows: Instructed [Large green stamp overlaid on document: 20 H.P. CHASSIS] | ||
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).