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(Aero Engine). 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(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 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} | ||
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).