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 1st and 2nd speed pinions to be made torsionally free to prevent gears working out.
| Identifier | ExFiles\Box 171\1\ img009 | |
| Date | 10th December 1925 | |
| RR 755 (10M) (SL391 2-11-23) MP 281297 ORIGINAL COMPLETED 25.1.26. STANDARDISATION of CHASSIS PARTS. Date 10.12.25 X No. 8310 Description of Parts. 1st, and 2nd. Speed Pinions to be made torsionally free. Origin. To prevent gears working out. Drawing No. Part List Experimental Test Report. This modification is essential when we use gate without notches, but it is desirable even with the present standard gate. Road Test Report. Run 10,000 miles on 8-EX. Run on 46-PK, 11-EX, 10-EX and 7-EX - total of 11,200 miles. 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. Weight of Old Part. Cost of Old Part. £ 3. 17. 6 Weight of New Part. Cost of New Part. £ 3. 15. 0d. Difference per Car. Difference per Car. £ 2. 0d. saving. Signature of Mr. De LOOZE that above is correct. MY/Rhs. 20.1.26 Cost of Parts in Works which will be scrapped if commenced on:- Series............£......... Series............£......... Series............£......... 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 MR. WORMALD | 11.12.25 | 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 | 11.12.25 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 11.12.25 | Agreed. Assume necessary and recommendation sound. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 14/12/25 | Agreed AE MR. NORTHEY | 11.12.25 | Agreed. PN.{Mr Northey} MR. HIVES | 19.1.26 | Agreed. E.Hives. [STAMP] PHANTOM | ||