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 of the change gear and brake operating mechanism.
| Identifier | ExFiles\Box 66\4\ scan0283 | |
| Date | 10th December 1925 | |
| RR 755 (10H) (SL391 2-11-23) MP 281297 x8320 Completed 25.1.26 STANDARDISATION of CHASSIS PARTS. Description of Parts. CHANGE GEAR AND BRAKE OPERATING MECHANISM. Origin. To improve design. Experimental Test Report. It is proposed to use a small gate for change speed mechanism without notches. The arrangement is neater and more convenient for coachwork - it is essential if body subframe is used. Road Test Report. Run 10,000 miles on 8-EX car - No troubles. Fitted to 46-PK, 11-EX, 7-EX and 10-EX - Total mileage 11,200 miles - No troubles. Weight of Old Part. £ Weight of New Part. £ Difference per Car. £ Cost of Old Part. Cost of New Part. Difference per Car. Signature of Mr. De LOOZE that above is correct. SIGNATURES, DATE, REMARKS MR. JOHNSON, 25.1.26, Agreed CJohnson 25/1 pm MR. B. JOHNSON, 20.1.26, agreed MR. ROYCE, 18.12.25, Agreed FHR. Spring plungers should have slightly less control by maing groove shallower - see also E's point. 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, 11.12.25, Agreed. If understood changing gear is at least as simple and effective as present std from customers point of view. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT, 14.12.25, Agreed. E.{Mr Elliott - Chief Engineer} Recommend lightest plunger springs possible, together with max. clearance and slightly rounded corners in gate. E.{Mr Elliott - Chief Engineer} MR. NORTHEY, 11.12.25, Agreed. PN.{Mr Northey} MR. HIVES, 19.1.26, Agreed. E.Hives. X No. 8320 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..........£.......... | ||