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 bevel on scraper piston rings to address over-oiling and smoking in Goshawk cars.
| Identifier | ExFiles\Box 77\3\ scan0267 | |
| Date | 14th November 1922 | |
| R.R. 755 (5 H) (S.J. 291, 12-10-21) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 3087. X.4224. HAWK. COMPLETED 23.11.22 STANDARDISATION of CHASSIS PARTS. Description of Parts. BEVEL ON SCRAPER PISTON RING. Origin. To overcome over-oiling and smoking. Date 14.11.22 X No. 4224 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. Experimental Test Report. The lower ring on the piston which acts as a scraper ring is bevelled on the lowe edge. We are receiving complaints of excessive smoking on the Goshawk cars. It becomes worse as they become worn. Road Test Report. Run 9500 miles on 1-G-11. successfully. Run 3500 miles on 3-G-11. " 1500 " " 7-G-11. In every case where we have used this scheme we have effected a definite improvement in oil consumption and smoking. Signature of Exp. Dept. that above is correct. E.{Mr Elliott - Chief Engineer} Hives. Weight of Old Part. Cost of Old Part. Weight of New Part. Cost of New Part. Difference per Car. Difference per Car. £ Negligible increase. Cost of Parts in Works which will be scrapped if commenced on :- Series.........£......... Series.........£......... Series.........£......... Storekeeper advised re above: Storekeeper's Signature Signature of Mr. De LOOSE that above is correct. My/JW 21.11.22. SIGNATURES | DATE | REMARKS Mr. JOHNSON Mr. E.{Mr Elliott - Chief Engineer} Johnson. | 23.11.22 | agreed - Presume no scrap Mr. ROYCE | 16.11.22 | Agreed. FHR. But make certain, as it is hardly logical. Mr. WORMALD | 16.11.22 | Agreed. Wor.{Arthur Wormald - General Works Manager} Mr. ROWLEDGE | 15.11.22 | Agreed. Rg.{Mr Rowledge} Mr. DAY | 16.11.22 | Agreed. Da.{Bernard Day - Chassis Design} Mr. BAILEY | 15.11.22 | Agreed. BY.{R.W. Bailey - Chief Engineer} Mr. PLATFORD | 15.11.22 | Agreed on behalf of EP.{G. Eric Platford - Chief Quality Engineer} (away in U.S.A.) J.A.Maddocks. Mr. NORTHEY EWT for R.R. Inc. | 15.11.22 | Agreed. PN.{Mr Northey} | ||