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 Phantom III crankshaft webs to a turned finish instead of ground finish for production cost reduction.
| Identifier | ExFiles\Box 171\5\ img034 | |
| Date | 12th May 1938 | |
| COMPLETED 16.6.38. PHANTOM III STANDARDISATION OF PARTS Date Issued 12.5.38. Sheet No. P.28. Drg. No. E.86615. L.O.P.S. Description: TURNED FINISH OF CRANKSHAFT WEBS IN PLACE OF GROUND FINISH. Purpose: Reduction in production cost. Brief Report and Remarks: Crankshaft with turned finish webs satisfactory after 40 hrs. endurance under severe conditions on Bentley 11. When recommended for Introduction: Report References: By Rm{William Robotham - Chief Engineer} Da{Bernard Day - Chassis Design} Mx{John H Maddocks - Chief Proving Officer} BY.{R.W. Bailey - Chief Engineer} RM.{William Robotham - Chief Engineer} DA.{Bernard Day - Chassis Design} MX{John H Maddocks - Chief Proving Officer} Old Parts: Material -, Labour £0.1.9., Burden £0.3.1., Total £0.4.10. New Parts: Material -, Labour -, Burden -, Total - Decrease in Cost £ 0.4.10. GIRL 30/5/38 Production Position and Comments: Cost of Tools £ Nil. Turned finish of faces of crankshaft webs instead of former ground finish provides a saving of 4/10d. per chassis due to deletion of grinding operation, and involves no tool cost. All crankshafts from 60th chassis in 'D' series onwards have been machined in this manner. RHC.{R. H. Coverley - Production Engineer} Authorisation to Proceed. Introduce on the 60 Chassis in D Series. Sg.{Arthur F. Sidgreaves - MD} Signature, Date 14/6/38 Hs.{Lord Ernest Hives - Chair} Signature | ||