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 lightened flywheel and clutch to reduce weight and cost.
| Identifier | ExFiles\Box 66\4\ scan0040 | |
| Date | 10th December 1925 | |
| RR 755 (10H) (SL391 2-11-23) MP 281297 18300 COMPLETED 14.1.26. STANDARDISATION of CHASSIS PARTS. Date 10.12.25 Description of Parts. LIGHTENED FLYWHEEL AND CLUTCH. Origin. To reduce weight and cost and to improve design. Experimental Test Report. The saving in weight is 28 lbs. There should be a saving in cost. The design is modified so that the clutch should stop more reliably. The wear on the fab should be even. Road Test Report. Run 10,000 miles on 8-EX car - no troubles. Fitted to 11-EX, 46-PK, and 10-EX - run a total of 6800 miles. We have had no trouble with these clutches. It is not anticipated that clutch jaggers will be cured by this clutch. Weight of Old Part. Cost of Old Part. £ 19. 2. 0d. Weight of New Part. Cost of New Part. £ 18. 14. 6d. Difference per Car. Difference per Car. £ 7. 6d. saving. Signature of Mr. De LOOZE that above is correct. My/Rns. 12.1.26. X No. 8300 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......... £......... TABLE OF SIGNATURES: SIGNATURES, DATE, REMARKS MR. JOHNSON, 13 Jan 26, agreed Johnson MR. B. JOHNSON, 13.1.26 (overwritten on 18.12.25), agreed MR. ROYCE, 18.12.25, Agreed. FHR. MR. WORMALD, 10.12.25, Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE, 11.12.25, Agreed. Rg.{Mr Rowledge} MR. DAY, 12.12.25, Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY, 10.12.25, Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD, 10.12.25, Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT, 14.12.25, Agreed. E.{Mr Elliott - Chief Engineer} Recommend further lightening of this part. MR. NORTHEY, 11.12.25, Agreed. PN.{Mr Northey} MR. HIVES, 12.1.26, Agreed. E.Hives. | ||