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 chassis parts, specifically Firth's Crown Steel car engine exhaust valves.
| Identifier | ExFiles\Box 171\1\ img178 | |
| Date | 23th August 1929 | |
| RR 755 REVISED (10H) (DF 687 4-1-29) BM. 2/5943. ORIGINAL (STAMPED) COMPLETED 27.11.29. (STAMPED) STANDARDISATION of CHASSIS PARTS. Date 23. 8. 29. Description of Parts. Firth's Crown Steel Car Engine Exhaust Valves. Origin. To reduce exhaust valve trouble. Experimental Test Report. We have proved this steel out on the R engine. It is better than anything we have previously tried. These valves have also run 250 hours on 'R' engines. Road Test Report. (BOX SECTION) X No. F474 Drawing No. Part List A Scrap and replace at all costs, including Chassis already delivered to Customers. B Scrap and replace on Chassis in Works. C Scrap present stock and replace on all Chassis not yet handed to test. D Use existing stock Alteration effective on future Chassis. (COST SECTION) 40/50 H.P. Weight of Old Part. Cost of Old Part. £ 1.18. 3 Weight of New Part. Cost of New Part. £ 2. 5.11 Difference per Car. Difference per Car. £ -. 7. 8 inc. 20 HP. Cost of Old Part. £1 12 9 Cost of New Part. £1 19 11 Difference per Car. £ - 7 2 inc Cost of Parts in Works which will be scrapped if commenced on:- Series..........£.......... Series..........£.......... Series..........£.......... Signature from Cost Dept. that above is correct. G/Rb{R. Bowen}16.11.29 Wor.{Arthur Wormald - General Works Manager}G19.11.29 (APPROVALS TABLE) INITIAL | DATE | REMARKS Sg.{Arthur F. Sidgreaves - MD} | 19. 11. 29. | Agreed Sg.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 26/8/29 | Agreed. FMR also modify for cooler Valve. WOR.{Arthur Wormald - General Works Manager} | 28. 8. 29 | Agreed, important. Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 26. 8. 29 | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 26. 8. 29 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 26. 8. 29 | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 14. 9. 29 | Agreed, if tested out O.K. for valve tappet clearances on E.{Mr Elliott - Chief Engineer} | 26/8/29 | Agreed (signature) PN.{Mr Northey} | 23. 8. 29 | Agreed PN.{Mr Northey} CWB. | 26. 8. 29 | Agreed C. Hs.{Lord Ernest Hives - Chair} | 23. 8. 29 | Agreed Hs.{Lord Ernest Hives - Chair} | ||