Standardisation of an ignition coil with 21,000 turns of 44 S.W.G. wire on the secondary to improve performance.
| Identifier | ExFiles\Box 164\5\ img129 | |
| Date | 5th January 1932 | |
| RR 78B (10M) (B459. 24-10-30) 6/3185. 6058 COMPLETED 16.2.32. STANDARDISATION of CHASSIS PARTS. Date 5.1.32. X No. 6058. Drawing No. Part List Description of Parts. IGNITION COIL TO D.72503 BUT WITH 21,000 TURNS OF 44 S.W.G. WIRE ON THE SECONDARY. Origin. To improve the performance on the "pick up" on the 20/25 H.P. when hot. Experimental Test Report. One of these coils has run 1300 hours on the bench. Others have been tested on the bench and chassis satisfactorily. Higher compression makes this coil more essential. Road Test Report. Run 12,600 miles on 18.G.IV. - O.K. [Purple Stamp: 20/25 HP CHASSIS] 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. Weight of Old Part. Cost of Old Part. £ - - Weight of New Part. Cost of New Part. £0-0-4 Extra Difference per Car. Difference per Car. £0-0-4 Increase Signature from Cost Dept. that above is correct. GTR 10/2/32 H.Barr Cost of Parts in Works which will be scrapped if commenced on:- Series...£... Series...£... Series...£... INITIAL | DATE | REMARKS SG. {Arthur F. Sidgreaves - MD} | 15-2-32 | Agreed Sg. {Arthur F. Sidgreaves - MD} R. {Sir Henry Royce} | 9.1.32. | Agreed FHR. WOR. {Arthur Wormald - General Works Manager} | 6.1.32. | Agreed Wor. {Arthur Wormald - General Works Manager} C. | 6.1.32. | Agreed C. RG. {Mr Rowledge} | 7.1.32. | Agreed Rg. {Mr Rowledge} DA. {Bernard Day - Chassis Design} | 11.1.32. | Agreed Da. {Bernard Day - Chassis Design} BY. {R.W. Bailey - Chief Engineer} | 6.1.32. | Agreed. For use at present with H.C. engines. BY. {R.W. Bailey - Chief Engineer} EP. {G. Eric Platford - Chief Quality Engineer} | 6.1.32. | Agreed EP. {G. Eric Platford - Chief Quality Engineer} E. {Mr Elliott - Chief Engineer} | 2.2.32. | Agreed AE. PN. {Mr Northey} | 6.1.32. | Agreed PN. {Mr Northey} HS. {Lord Ernest Hives - Chair} | 6.1.32. | Agreed Hs. {Lord Ernest Hives - Chair} | ||
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).