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 tyre tread pattern.
| Identifier | ExFiles\Box 45\2\ Scan320 | |
| Date | 7th October 1930 | |
| RR 75B (10M) (3-7-30) BM. G/2571. X4050. 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. STAMPED TEXT: RECEIVED 8 OCT 1930 Experimental Test Report. This pattern tread is similar to the present except it has transverse grooves in the tread. Road Test Report. Run approx. 1,000 on London Trials cars. Run 1,000 on experimental cars. STAMPED TEXT: PHANTOM II / 20/25 H.P. CHASSIS Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. Phantom II £15-19-7 | 20/25HP 12-7-6 Cost of New Part. £15-19-7 | 12-7-6 Difference per Car. £ None Signature from Cost Dept. that above is correct. GRL 8/11/30 G 10/11/30 RIGHT HAND SIDE BOX: X No. 4050. No. 7820. Drawing No. 5820. Part II A Scrap and replace at our cost, including Chassis already delivered to customers. B Scrap and replace on Chassis in works. C Scrap present stock and replace on all Chassis now handed to test. D Use existing stock Alteration effective on future Chassis. Cost of Parts in Works which will be scrapped if commenced on:- Series.....£...... Series.....£...... Series.....£...... APPROVALS TABLE: 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 FHR. 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. | ||