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 regarding the deletion of security bolts for tyres.
| Identifier | ExFiles\Box 53\1\ Scan122 | |
| Date | 4th September 1922 | |
| R.R. 755 (5 H) (S.J. 297, 12-10-21) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 3057. Y4546 Completed 5.10.22 STANDARDISATION of CHASSIS PARTS. Description of Parts. Deletion of security bolts for tyres. Origin. To avoid tyre failures. Experimental Test Report. All of the leading tyre makers have abandoned the use of security bolts. The present security bolts which are manufactured are only suitable for fabric tyres - cord tyres need a special type owing to alteration in shape of tread. Road Test Report. We have carried out tests on the road with and without security bolts. The results show that with properly fitted security bolts, a flat tyre might be delayed in coming off but is not prevented. See letter attached. (21.7.22) Hs {Lord Ernest Hives - Chair} 3/19 10.8.22 Signature of Exp. Dept. that above is correct. E.Hives. Weight of Old Part. £ Cost of Old Part. £ Weight of New Part. £ Cost of New Part. £ Difference per Car. Difference per Car. £0. 12. 9 decrease. Signature of Mr. De LOOSE that above is correct. My/JW 15.9.22 SIGNATURES: Mr. JOHNSON / Mr. B. Johnson DATE: 22 Sept REMARKS: agreed Mr. ROYCE DATE: 25.9.22, 3.10.22. REMARKS: agreed R. {Sir Henry Royce} Mr. WORMALD DATE: 19.9.22 REMARKS: Agreed. Wor. {Arthur Wormald - General Works Manager} Mr. ROWLEDGE DATE: 4.9.22. REMARKS: Agreed. Rg. {Mr Rowledge} Mr. DAY DATE: 5.9.22 REMARKS: Agreed. Da. {Bernard Day - Chassis Design} Mr. BAILEY DATE: 4.9.22 REMARKS: Agreed. BY. {R.W. Bailey - Chief Engineer} Mr. PLATFORD DATE: 11.9.22 REMARKS: Agreed. EP. {G. Eric Platford - Chief Quality Engineer} Mr. NORTHEY / E.W.I. for A.R. Inc. DATE: 21.9.22 REMARKS: Agreed. PN. {Mr Northey} RIGHT-HAND COLUMN: 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 of Parts in Works which will be scrapped if commenced on :- Series........ £........ Series........ £........ Series........ £........ Storekeeper advised re above; Storekeeper's Signature | ||