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 parts regarding the clearance between inlet valves and guides.
| Identifier | ExFiles\Box 171\2\ img266 | |
| Date | 16th March 1937 | |
| RR 755 (5H) 20396 21/7/36 J.W.S. COMPLETED 25.3.37. PHANTOM III. STANDARDISATION of PARTS Date 16.3.37. X No. 354. Drawing No. Part List Description of Parts. CLEARANCE BETWEEN INLET VALVES AND GUIDES. Origin. Overoiling due to oil being sucked down the clearance in guides. Report of Experimental Test. By fitting inlet valves with a diametrical clearance of .0015 to .002 in 3-AZ-170 in place of standard clearance at .002 to .003, consumption raised from 350-750 m.p.g. Valves with reduced clearance have been run successfully on Test Bed units and 35-MX{John H Maddocks - Chief Proving Officer} (15,000 miles) without any sticking. Present limits. Valve .3417-.3422 Guide .3437-.3442 (E.86363). Reduced limits .3422-.3427 (E.86783). MATERIAL £ s. d.{John DeLooze - Company Secretary} LABOUR £ s. d.{John DeLooze - Company Secretary} CHARGES £ s. d.{John DeLooze - Company Secretary} TOTAL £ s. d.{John DeLooze - Company Secretary} Cost of Old Part Cost of New Part Nett Increase Decrease NO DIFFERENCE. Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 15.3.37. INITIAL | DATE | REMARKS sg.{Arthur F. Sidgreaves - MD} | 24.3.37. | Agreed Sg.{Arthur F. Sidgreaves - MD} WOKX Hs.{Lord Ernest Hives - Chair} | 17.3.37. | Agreed Hs.{Lord Ernest Hives - Chair} C. | 17.3.37. | Agreed C. E.{Mr Elliott - Chief Engineer} | 17.3.37. | Agreed Da.{Bernard Day - Chassis Design} for E.{Mr Elliott - Chief Engineer} (absent). DA.{Bernard Day - Chassis Design} | 17.3.37. | Agreed Da.{Bernard Day - Chassis Design} By.{R.W. Bailey - Chief Engineer} | 17.3.37. | Agreed By.{R.W. Bailey - Chief Engineer} E.P. | 17.3.37. | Agreed EP.{G. Eric Platford - Chief Quality Engineer} SFT.{Mr Swift} | 18.3.37. | Agreed Sft.{Mr Swift} MX.{John H Maddocks - Chief Proving Officer} | 16.3.37. | Agreed Mx.{John H Maddocks - Chief Proving Officer} HS.{Lord Ernest Hives - Chair} XXX Rm.{William Robotham - Chief Engineer} | 16.3.37. | Agreed Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} | 16.3.37. | Agreed RHC.{R. H. Coverley - Production Engineer} | ||