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 for the Phantom III, concerning the clearance between inlet valves and guides.
| Identifier | ExFiles\Box 96\2\ scan0216 | |
| Date | 25th 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 (crossed out) 25.3.37. 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. [Text crossed out: By fitting inlet valves with a diametrical clearance of .0015 to .002 in 3AZ170 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-EX (15,000 miles) without any sticking. Present limits. Guide. .3437+1/4 (E.86363). Valve .3417-1/2 Reduced limits..3422-1/4 (E.86783). Cost of Old Part Cost of New Part Nett Increase Decrease NO DIFFERENCE Signature from Cost Dept. that above is correct. G/RL 15.3.37. INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 24-3-37 | Agreed SG{Arthur F. Sidgreaves - MD} Hs.{Lord Ernest Hives - Chair} | | 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} 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} | ||