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 an oil relief valve to improve reliability.
| Identifier | ExFiles\Box 66a\4\ scan0021 | |
| Date | 22th September 1926 | |
| RR 755 (10H) (DB{Donald Bastow - Suspensions}130 12-9-24) MS 301225 XC205 COMPLETED 20.10.26 STANDARDISATION of CHASSIS PARTS. Date 22.9.26 Description of Parts: OIL RELIEF VALVE. Origin: To improve reliability. Experimental Test Report. The new design of valve avoids the risk of stick-ing. It is also fitted in a more accessible position. Road Test Report. Run 10,000 miles on 12-EX. No failures during test of stick-oil pressure. This is the first 10,000 miles which has been completed without relief valve having to be dismantled. [Right Side Box] X No. 7205 Drawing No. 8205 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. £ 1 - 18 - 10 Weight of New Part. Cost of New Part. £ 2 - 2 - 5 Difference per Car. Difference per Car. £ 3/7 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. MyRLt 11/10/26 SIGNATURES | DATE | REMARKS ---|---|--- MR. JOHNSON | 24.9.26 | Agreed. CWB. MR. B. JOHNSON | 20.10.26 | Agreed. B.Johnson. MR. ROYCE | 24.9.26 | Agreed. FHR. MR. WORMALD | 22.9.26 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 22.9.26 | Agreed. Rg.{Mr Rowledge} MR. DAY | 24.9.26 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 11.10.26 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 23.9.26 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 25.9.26 | Agreed. E.{Mr Elliott - Chief Engineer} But the design we want to standard-ise is Lec.2257 which is somewhat different in arrgt. to the scheme actually tested, although the valves them-selves are identical. E.{Mr Elliott - Chief Engineer} MR. NORTHEY | | MR. HIVES | 22.9.26 | Agreed. Hs.{Lord Ernest Hives - Chair} [Stamp] ACTION | ||