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 test report for a Dunlop Super Double Lift Jack No. 10.
| Identifier | ExFiles\Box 48\1\ Scan054 | |
| Date | 21th May 1930 | |
| RR 786 REVISED (10H) (DG 348 19-7-29) 5M. 6/643. COMPLETED 4.8.30. X4124 STANDARDISATION of CHASSIS PARTS. Date 21.5.30. X No. 4124. Drawing No. Part List Description of Parts. DUNLOP SUPER DOUBLE LIFT JACK NO. 10. Origin. A modification of the present Dunlop Super Double Lift jack, embodying improvements to parts which were unreliable. The general design is unaltered. Experimental Test Report. This jack has been utilised to lift the whole of the front of a P.II car throughout its range of lift 25 times. Also to lift one side of the front from a flat tyre level to inflated tyre level 25 times. After these tests the jack was in excellent condition. Road Test Report. [Blank] [Checklist Section] [X] 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.......£....... [Data Section] Weight of Old Part. 10 1/4 lbs. Weight of New Part. 10 1/4 lbs. Difference per Car. Nil. Cost of Old Part. £0-19-6 (Amended to 20/-) Cost of New Part. £0-19-6 (Amended to 20/-) Difference per Car. £ none (Amended to Nil.) Signature from Cost Dept. that above is correct. GRT 19/6/30 G.H. 20/6/30. [Stamp: CHASSIS DEPT.] [Stamp: RECEIVED 23 JUN 1930] [Approval Table] INITIAL | DATE | REMARKS BJx, SG. {Arthur F. Sidgreaves - MD} | 28.6.30 | Agreed SG. {Arthur F. Sidgreaves - MD} R. {Sir Henry Royce} | 2.6.30 | Agreed FHR. WOR. {Arthur Wormald - General Works Manager} | 22.5.30 | Agreed Wor. {Arthur Wormald - General Works Manager} RG. {Mr Rowledge} | 22.5.30 | Agreed Rg. {Mr Rowledge} DA. {Bernard Day - Chassis Design} | 23.5.30 | Agreed Da. {Bernard Day - Chassis Design} BY. {R.W. Bailey - Chief Engineer} | 22.5.30 | Agreed By. {R.W. Bailey - Chief Engineer} EP. {G. Eric Platford - Chief Quality Engineer} | 27.5.30 | Agreed EP. {G. Eric Platford - Chief Quality Engineer} E. {Mr Elliott - Chief Engineer} | 27.5.30 | Agreed AE. One would have thought the test would have been 250 times. The Dunlop Jack for balloon tyres - a sample seen in Derby had a very short bearing for the overhung bevel pinion, which bearing looked as if it would soon wear. We suggest bearing 50% longer. AE. PN. {Mr Northey} | 23.5.30 | Agreed PN. {Mr Northey} CWB. | 22.5.30 | Agreed C. HS. {Lord Ernest Hives - Chair} | [Blank] | Agreed. | ||