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 document for a modification to the tread pattern on tyres to improve road grip.
| Identifier | ExFiles\Box 171\1\ img228 | |
| Date | 7th October 1930 | |
| R 755 (10H) (3-7-30) 5M. 6/2571. ORIGINAL COMPLETED 12.11.30. STANDARDISATION of CHASSIS PARTS. Date 7.10.30 Description of Parts. MODIFICATION TO TREAD PATTERN ON TYRES. Origin. To improve grip on the road. Experimental Test Report. This pattern tread is similar to the present except it has transverse grooves in the tread. Road Test Report. Run approx. 5,000 miles on London trials cars. Run 1,000 miles on Exp. cars. [STAMPED TEXT] PHANTOM II & 20/25 H.P. CHASSIS X No. 4050. 7820. Drawing No. 5820. 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 Chassis not yet handed to test. D Use existing stock alteration effective on future Chassis. Cost Section: P.II. Cost of Old Part. £15.19. 7d. Cost of New Part. £15.19. 7d. Difference per Car. £ Nil. 20/25 HP. Cost of Old Part. 12. 7. 6d. Cost of New Part. 12. 7. 6d. Difference per Car. Nil. Cost of Parts in Works which will be scrapped if commenced on:- Series......£...... Series......£...... Series......Wor.{Arthur Wormald - General Works Manager}..... Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 8.11.30. G.10.11.30. Wor.{Arthur Wormald - General Works Manager} INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 11.11.30 | Agreed Sg.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 20/10/30 | Agreed AHR WOR.{Arthur Wormald - General Works Manager} | 4.11.30 | Agreed Wor.{Arthur Wormald - General Works Manager} C. | | Agreed C. RG.{Mr Rowledge} | 5.11.30 | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 10.10.30 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 8.10.30 | Agreed BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 9.10.30 | Agreed EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 10.10.30 | Agreed AE. PN.{Mr Northey} | 10.10.30. | Agreed as an alternative to the buttress. PN.{Mr Northey} HS.{Lord Ernest Hives - Chair} | | Agreed. | ||