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 proposal for the fixing of the spring in an air valve to improve reliability.
| Identifier | ExFiles\Box 66a\1\ scan0107 | |
| Date | 11th January 1926 | |
| RR 755 (10H) (DB{Donald Bastow - Suspensions}130 12-9-24) MS 301225 78080 COMPLETED 22.2.26. STANDARDISATION of CHASSIS PARTS. Date 11.1.26 Description of Parts: FIXING OF SPRING IN AIR VALVE. Origin: To improve reliability. Experimental Test Report. It is proposed to revert to the original fixing of the spring in the air valve to the top cover by means of a screw. The present arrangement of pushing the top coils into a recess is not reliable. Road Test Report. Fitted to 10-G-111 - run 1800 miles. Fitted to 10-EX - run 800 miles. A similar scheme was fitted to all Silver Ghost cars. [Box X checked] No. 5080/8080 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. Weight of New Part. Difference per Car. Cost of Old Part. £ .1. 4d. 20 HP. £ .1. 10d. 40/50 HP. Cost of New Part. £ .2. 0d. 20 HP. £ .2. 5d. 40/50 HP. Difference per Car. £ . 8d. 20 HP. increase. £ . 7d. 40/50. 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. My/Rms. 14.1.26. SIGNATURES | DATE | REMARKS MR. JOHNSON | 22 Feb | agreed MR. B. JOHNSON | 22.2.26 | agreed MR. ROYCE | 15.1.26 | Agreed. FHR. MR. WORMALD | 11.1.26 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 11.1.26 | Agreed. Rg.{Mr Rowledge} MR. DAY | 13.1.26 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 12.1.26 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 13.1.26 | Agreed, as spring clearance does not remain constant, carb. unreliable, advise retrospective action. E.P. MR. ELLIOTT | 17.2.26 | Agreed. E.{Mr Elliott - Chief Engineer} MR. NORTHEY | 13.1.26 | Agreed. PN.{Mr Northey} MR. HIVES | 19.2.26 | Agreed. E.{Mr Elliott - Chief Engineer} Hives. | ||