Standardisation of the big end bearing bush and connecting rod to reduce oil consumption.
| Identifier | ExFiles\Box 115\3\ scan0048 | |
| Date | 5th July 1937 | |
| RR 755B (10H) 26074 2-11-36 WHK 24999 COMPLETED 7.9.37. BENTLEY STANDARDISATION of PARTS. Description of Parts: BIG END BEARING BUSH & CONNECTING ROD. Origin: To avoid excessive oil consumption in conjunction with drilling an extra hole in each crankpin to overcome bearing siezure. Report of Experimental Test: A standardisation sheet has been issued for 2 holes in each crankpin so that if 2 feed holes are retained in the big end bush, the oil jet hole is fed 4 times/rev. From experience we know that the jet of oil has an adverse effect on oil consumption. This sheet is to standardise a single centre hole in the bearing bush, thus the rod will be fed 2 times/rev. as existing standard. Accordingly the groove in the con. rod becomes unnecessary and can be deleted. MATERIAL £ s. d. {John DeLooze - Company Secretary} Cost of Old Part: 1 13 8 Cost of New Part: 1 13 8 LABOUR £ s. d. {John DeLooze - Company Secretary} 2 3 9 2 3 4 CHARGES £ s. d. {John DeLooze - Company Secretary} 3 16 6 3 15 10 TOTAL £ s. d. {John DeLooze - Company Secretary} 7 13 11 7 12 10 Nett Decrease: 1 1 Signature from Cost Dept. that above is correct. G R h 18.8.37. INITIAL | DATE | REMARKS SG. {Arthur F. Sidgreaves - MD} | 6-9-37 | Agreed Sg. {Arthur F. Sidgreaves - MD} HS. {Lord Ernest Hives - Chair} | | Agreed Hs. {Lord Ernest Hives - Chair} C. | 24.8.37. | Agreed C. E. {Mr Elliott - Chief Engineer} | | DA. {Bernard Day - Chassis Design} | 26.8.37. | Agreed Da. {Bernard Day - Chassis Design} BY. {R.W. Bailey - Chief Engineer} | 25.8.37. | Agreed By. {R.W. Bailey - Chief Engineer} EP. {G. Eric Platford - Chief Quality Engineer} | | SFT. {Mr Swift} RHC. {R. H. Coverley - Production Engineer} | 25.8.37. | Agreed RHC. {R. H. Coverley - Production Engineer} MX. {John H Maddocks - Chief Proving Officer} | 30.8.37. | Agreed Mx. {John H Maddocks - Chief Proving Officer} RM. {William Robotham - Chief Engineer} | 23.8.37. | Agreed Rm {William Robotham - Chief Engineer} STAMP: J.S. 8 SEP 1937 | ||
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).