Standardisation of parts for the Phantom III, detailing the deletion of hydraulic tappets and introduction of solid rocker gear.
| Identifier | ExFiles\Box 171\5\ img011 | |
| Date | 4th November 1937 | |
| RR 755 (10H) (49988) 19/10/37 C.E.Co. COMPLETED 18.1.38. PHANTOM III STANDARDISATION OF PARTS Description: SOLID ROCKER GEAR (DELETION OF HYDRAULIC TAPPETS). Purpose: Improved reliability and reduction in cost. Date Issued: 4.11.37 Sheet No.: P.10. Drg. No.: L.O.P.S. Brief Report and Remarks Ran satisfactory 15,000 miles in France on 32-EX. Also fitted to 35-EX and 37-EX. Recommend tappet clearance .008 cold. Cylinder heads must be E.88758 and not E.89206 which needs testing before adoption. When recommended for Introduction: 1st. in D. {John DeLooze - Company Secretary} Report References: Rm {William Robotham - Chief Engineer} /Swd1.5/AP.988 By Rm {William Robotham - Chief Engineer} Da {Bernard Day - Chassis Design} Mx {John H Maddocks - Chief Proving Officer} , Rm {William Robotham - Chief Engineer} /Swd15/B.1637, Rm {William Robotham - Chief Engineer} /Swd1.2/AP.18937, Rm {William Robotham - Chief Engineer} /Swd1.5/AP.7837, Rm {William Robotham - Chief Engineer} /Swd1.7/AP.1.10137 Table of Costs: Old Parts: Royalty £0.8.5. Material £7.0.9. Labour £17.13.6. Burden £30.18.8. Total £56.1.4. New Parts: Material £5.12.3. Labour £10.8.6. Burden £18.4.11. Total £34.5.8. Decrease in Cost £ 21. 15. 8. G {Mr Griffiths - Chief Accountant / Mr Gnapp} /RH {R. Hollingworth} 31/12/37 Production Position and Comments Cost of Tools £ 300.0.0d. Solid rocker gear to be introduced at 1st. chassis in 'D' series, reduces Factory cost of Chassis by £21.15.8d., due to deletion of hydraulic tappets and simplification of bottom tappet clamps. Nett. cost of material rendered scrap is £1350.0.0d. and tool cost is £300.0.0d. (principally for new camshaft and tappet block tools). The combined tool and scrap cost of £1650.0.0d. will be recovered after producing 76 chassis with solid tappets, and a decrease in Policy and Guarantee charges is also anticipated with the simplified design. Authorisation to Proceed. Introduce on the 1 Chassis in D Series. Sg. {Arthur F. Sidgreaves - MD} RHC {R. H. Coverley - Production Engineer} Date 17-1-38. Hs. {Lord Ernest Hives - Chair} HS {Lord Ernest Hives - Chair} Date 17/1/38 | ||
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).