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 33' x 6' tyres for the 20 HP chassis.
| Identifier | ExFiles\Box 58\1\ Scan031 | |
| Date | 21th March 1927 | |
| RR 785 REVISED (10H) (DE 649 9-12-26) BM. 2/1187. COMPLETED 22.6.27 STANDARDISATION of CHASSIS PARTS. Date 21.3.27 Description of Parts. 33" X 6" TYRES - 20 HP. Origin. Request from Sales. X No. 4565 (Handwritten above is 5820 crossed out) 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. Experimental Test Report. These tyres fit on the existing well base rims. They will only be fitted when specially demanded by a customer. Road Test Report. We have run these tyres over 10,000 miles on Experimental cars without any trouble. Weight of Old Part. Cost of Old Part. £ 21. 18. 8d. Weight of New Part. Cost of New Part. £ 22. 13. 8d. Difference per Car. Difference per Car. £ 15. 0d. increase. Signature from Cost Dept. that above is correct. My/Rb.{R. Bowen} 21.4.27 Cost of Parts in Works which will be scrapped if commenced on :- Series.........£....... Series.........£....... Series.........£....... INITIAL | DATE | REMARKS BJ. | 22.6.27 | Agreed. B.Johnson. R.{Sir Henry Royce} | 24.3.27 | Agreed. FHR. But I think they should be the regular standard recommended by us. WOR.{Arthur Wormald - General Works Manager} | 28.3.27 | Agreed. Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 27.3.27 | Agreed. Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 22.3.27 | Agreed. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 30.3.27 | Agreed. BY.{R.W. Bailey - Chief Engineer} This means modified rear carrier and grid. It will necessarily reduce lock. EP.{G. Eric Platford - Chief Quality Engineer} | 22.3.27 | Agreed - on cars with front hydraulic shock absorbers and friction pivots on cross steering tube. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 24.3.27 | Agreed. E.{Mr Elliott - Chief Engineer} Recommend always fit. PN.{Mr Northey} | | CWB. | 22.3.27 | Agreed. CWB. Hs.{Lord Ernest Hives - Chair} | 21.3.27 | Agreed. Hs.{Lord Ernest Hives - Chair} [Stamp in center: 20. H.P. CHASSIS] | ||