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 a special valve for the Autovac to improve slow running.
| Identifier | ExFiles\Box 56\1\ Scan005 | |
| Date | 22th April 1926 | |
| RR 755 (10H) (DB{Donald Bastow - Suspensions}130 12-9-24) MS 301225 X5510 COMPLETED 26.5.26. STANDARDISATION of CHASSIS PARTS. Description of Parts SPECIAL VALVE FOR AUTOVAC. Origin. To reduce effect on slow running. Experimental Test Report. It has been proved that when the Autovac is exhausted and very rich mixture is drawn into the induction pipe, this upsets the slow running. The makers of the Autovac recommend fitting an extra valve on the induction pipe which makes the autovac practically inoperative when the depressions in the induction pipe exceed 7 lbs. Road Test Report. Ran 10,000 miles on 8-EX. 12 of these fittings have been supplied for trials Cars, and special customers complaints - we have had no trouble with them. Date S.510 SS{S. Smith}10 3570 X No. 22.4.26 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. £ 2 - 2 - 0 Weight of New Part. Cost of New Part. £ 2 - 6 - 0 Difference per Car. Difference per Car. £ 4/- 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 Rb.{R. Bowen} 26/4/26 SIGNATURES | DATE | REMARKS MR. JOHNSON MR. B. JOHNSON | 20.5.26 | Agreed. B. Johnson. MR. ROYCE | 15.5.26 | Agreed. FHR. MR. WORMALD | 22.4.26 | Agreed. Wor.{Arthur Wormald - General Works Manager} MR. ROWLEDGE | 26.4.26 | Agreed. Rg.{Mr Rowledge} MR. DAY | 24.4.26 | Agreed. Da.{Bernard Day - Chassis Design} MR. BAILEY | 22.4.26 | Agreed. BY.{R.W. Bailey - Chief Engineer} MR. PLATFORD | 22.4.26 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT | 24.4.26 | Agreed. E.{Mr Elliott - Chief Engineer} MR. NORTHEY | 23.4.26 | Agreed. PN.{Mr Northey} MR. HIVES | 18.5.26 | Agreed. E.{Mr Elliott - Chief Engineer} Hives. [Watermark: PHANTOM CHASSIS] | ||