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 report for Firths front springs for 4-wheel brake cars, to improve design.
| Identifier | ExFiles\Box 171\3\ img250 | |
| Date | 15th December 1924 | |
| RR 755 (10H) (SL391 2-11-23) MP 281297 ORIGINAL COMPLETED 9.1.25. STANDARDISATION of CHASSIS PARTS. Date 15.12.24. Description of Parts. FIRTHS FRONT SPRINGS FOR 4-WHEEL BRAKE CARS. Origin. To improve design. Experimental Test Report. These springs are made with increased number of plates. They can be used as either 12 1/2% or 20% stiffer than old standard springs. Road Test Report. Run 10,000 miles in France. No trouble. Bumping tests shew these springs to give a better life than any others tested. [X] No. 9410 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 Weight of Old Part. Cost of Old Part. £ Weight of New Part. Cost of New Part. £ Difference per Car. Difference per Car. £ Cost of Parts in Works which will be scrapped if commenced on :- Series.......... £ .......... Series.......... £ .......... Series.......... £ .......... Signature of Mr. De LOOZE that above is correct. SIGNATURES | DATE | REMARKS MR. JOHNSON | | MR. B. JOHNSON | 7.1.25 | Agreed. BJ. MR. ROYCE | 29/12/24 | Agreed FHR MR. WORMALD | 15.12.24 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 15.12.24 | Agreed. Rg.{Mr Rowledge} MR. DAY | 16.12.24 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 15.12.24 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 16.12.24 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 17/12/24 | Agreed E.Elliott MR. NORTHEY | 27.12.24 | Agreed. PN.{Mr Northey} MR. HIVES | 3.1.25 | Agreed. E.Hives. | ||