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).
Proposal for a small gate change speed mechanism without notches to improve design.
| Identifier | ExFiles\Box 171\1\ img006 | |
| Date | 10th December 1925 | |
| RR 755 (10M) (SL391 2-11-23) MP 281297 ORIGINAL COMPLETED 25.1.26. 7 STANDARDISATION of CHASSIS PARTS. Description of Parts. CHANGE GEAR AND BRAKE OPERATING MECHANISM. Date 10.12.25 X No. 8320 Drawing No. Part List Origin. To improve design. Experimental Test Report. It is proposed to use a small 1/2 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. [STAMP: PHANTOM] 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....... £........... Weight of Old Part. Cost of Old Part. Weight of New Part. Cost of New Part. Difference per Car. Difference per Car. Signature of Mr. De LOOZE that above is correct. SIGNATURES DATE REMARKS MR. JOHNSON 25.1.26 Agreed. C. Johnson. MR. B. JOHNSON 20.1.26 Agreed. B.J. MR. ROYCE 18/12/25 Agreed FHR Spring plungers should have slightly less control by making groove shallower see also E & P comments 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 AE Recommend lightest plunger springs possible, together with maximum clearances and slightly rounded corners in gate. MR. NORTHEY 11.12.25 Agreed. PN.{Mr Northey} MR. HIVES 19.1.26 Agreed E.Hives. | ||