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 ignition governor oil relay piston using metal packing rings.
| Identifier | ExFiles\Box 65\1\ scan0186 | |
| Date | 23th September 1926 | |
| RR 755 REVISED (10H) (DE444 6-10-26) BM. COMPLETED 20.10.26 STANDARDISATION of CHASSIS PARTS. Description of Parts. IGNITION GOVERNOR OIL RELAY PISTON USING METAL PACKING RINGS. Origin. To obtain more sensitive ignition control and lessen detonation. To work with less oil pressure. Experimental Test Report. This was improved to overcome sluggishness in action to retard ignition in ratio of engine speed and to operate with less oil pressure. Road Test Report. Fitted to 12-EX - ran 10,000 miles in France. With ignition levers set full advance the timing was set to 17° B.T.D.C. this gave the best results. The governor was sensitive throughout the test. Detonations were considerably reduced. It was a considerable improvement over the present standard fitting. Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. £2. 6. 10d. Cost of New Part. £2. 14. 10d. Difference per Car. £ 8. 0d. increase. Signature from Cost Dept. that above is correct. My/Rb.{R. Bowen} 16.10.26. Date 23.9.26 X No. 7685 Drawing LeC. No. 2242/44 Part L.O.P. List E.74694 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. Cost of Parts in Works which will be scrapped if commenced on :- Series.........£....... Series.........£....... Series.........£....... INITIAL | DATE | REMARKS BJ. | 20/10/26 | agreed pressure R.{Sir Henry Royce} | 25.9.26 | Agreed. F HR. WOR.{Arthur Wormald - General Works Manager} | 24.9.26 | Agreed. Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 27.9.26 | Agreed. Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 27.9.26 | Agreed. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 11.10.26 | Agreed. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 27.9.26 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 27.9.26 | Agreed. E.{Mr Elliott - Chief Engineer} PN.{Mr Northey} | 1.10.26 | Agreed. PN.{Mr Northey} CWB. | 24.9.26 | Agreed. CWB. Hs.{Lord Ernest Hives - Chair} | 23.9.26 | Agreed. Hs.{Lord Ernest Hives - Chair} [STAMPED TEXT] CANCELLED | ||