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 springs as a new source of supply.
| Identifier | ExFiles\Box 171\3\ img232 | |
| Date | 9th April 1924 | |
| RR 755 (10H) (SL391 2-11-23) MP 281297 COMPLETED 9.5.24 STANDARDISATION of CHASSIS PARTS. Description of Parts. FIRTHS SPRINGS. Date 9.4.24 X No. 2626 Drawing No. Part List Origin. Further source of supply. Experimental Test Report. The latest Firths springs 45" long, are giving 30% longer life on the bump test compared with Woodheads 42" springs. The results are also very consistent. We have completed 150 hours running on the bump test. see report attached. Road Test Report. Set of latest front springs run 6000 miles in France on 96-NK. Another has run 2000 miles in France on Q-PK. We have had no failures on the road with these springs. Actions: 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. Weight of New Part. Difference per Car. Cost of Old Part. £ 23. 0. 0 Cost of New Part. £ 27. 5. 0 Difference per Car. £ 4. 5. 0 increase. Cost of Parts in Works which will be scrapped if commenced on:- Series.......... £ .......... Series.......... £ .......... Series.......... £ .......... Signature of Mr. De LOOZE that above is correct. Hy{Tom Haldenby - Plant Engineer}/Rhs. 5.5.24 SIGNATURES | DATE | REMARKS MR. JOHNSON | 8.5.24 | Agreed. C.Johnson. MR. B. JOHNSON | 6.5.24 | Agreed. B.Johnson. MR. ROYCE | 14/4/24 | Agreed. FHR. With still further development the 45" should give a further improvement. MR. WORMALD | 10.4.24 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 10.4.24 | Agreed. RG.{Mr Rowledge} MR. DAY | 12.4.24 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 11.4.24 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 10.4.24 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 12.4.24 | Agreed. E.{Mr Elliott - Chief Engineer} MR. NORTHEY | 17.4.24 | Agreed. PN.{Mr Northey} MR. HIVES | 5.5.24 | Agreed. E.Hives. | ||