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 proposal for the deletion of security bolts for tyres.
| Identifier | ExFiles\Box 171\3\ img128 | |
| Date | 4th September 1922 | |
| R.R. 753 (S H) (S.J. 291. 1v-10-21) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 3087. COMPLETED 5.10.22 STANDARDISATION of CHASSIS PARTS. ORIGINAL 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. See letter attached. 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. Signature of Exp. Dept. that above is correct. E.{Mr Elliott - Chief Engineer} Hives. Weight of Old Part. Cost of Old Part. £ Weight of New Part. Cost of New Part. £ 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. ROYCE Mr. WORMALD Mr. ROWLEDGE Mr. DAY Mr. BAILEY Mr. PLATFORD Mr. NORTHEY DATE 22.9.22. 25.9.22 3.10.22 19.9.22 4.9.22. 5.9.22 4.9.22 11.9.22 21.9.22 REMARKS Agreed. CJ. Agreed. BJ. Agreed RH{R. Hollingworth} Agreed. Wor.{Arthur Wormald - General Works Manager} Agreed. Rg.{Mr Rowledge} Agreed. Da.{Bernard Day - Chassis Design} Agreed. BY.{R.W. Bailey - Chief Engineer} Agreed. EP.{G. Eric Platford - Chief Quality Engineer} Agreed. PN.{Mr Northey} Right side box: Date 4.9.22. X No. 4546 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 [X] 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 | ||