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 Morganite EG.2 quality brushes for 20 HP dynamos as a secondary supply option.
| Identifier | ExFiles\Box 50\5\ Scan304 | |
| Date | 25th March 1924 | |
| RR 755 (10M) (SL391 2-11-23) MP 281297 XL.333 COMPLETED 23.4.24. STANDARDISATION of CHASSIS PARTS. Date 25.3.24. Description of Parts. MORGANITE EG.2 QUALITY BRUSHES FOR 20 HP. DYNAMOS (in case only of failure of supply of present standard Z Le Carbone brushes). Origin. Desirability of second source of supply in case of failure. Experimental Test Report. The EG2 material is the nearest Morganite equivalent of the Le Carbone Z material, being hard graphitic, and having a specific resistance of .0012 ohm per inch cube. See also extracts attc. EFC {E. Fowler Clarke - Electrical Engineer} 8/T22.10.23. EFC {E. Fowler Clarke - Electrical Engineer} 3/T10.12.23 and AB.9 Road Test Report. Extract from EFC {E. Fowler Clarke - Electrical Engineer} 9/T9.1.24. "We now have further evidence on examination of a set of these brushes running on a dynamo on 7-GII, that EG.2. brushes are satisfactory as an alternative to our standard Z Le Carbone, and as such should be kept in mind in case of failure of supply of Le Carbone." X No. 4333. Drawing No. Part List A Scrap and replace at all costs including Chassis already delivered to customers. B Scrap and replace 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...£... Weight of Old Part. Cost of Old Part. £ 2S. 7d. Weight of New Part. Cost of New Part. £ 3S. 6d. Difference per Car. Difference per Car. £ 11d increase. Signature of Mr. De LOOZE that above is correct. MV/JW. 26.3.24. SIGNATURES, DATE, REMARKS MR. JOHNSON, 15.4.24, Agreed, subject to 10,000 miles road test. C.Johnson. MR. B. JOHNSON, 17.4.24, Agreed. ditto. BJ. MR. ROYCE, 9.4.24, Agreed, providing we prove that the quality is uniform. I fear this. FHR. MR. WORMALD, 1.4.24, Have we run 10,000 miles road test? Wor. {Arthur Wormald - General Works Manager} MR. ROWLEDGE, 31.3.24, Agreed. Rg. {Mr Rowledge} MR. DAY, 27.3.24, Agreed. Da. {Bernard Day - Chassis Design} MR. BAILEY, 27.3.24, Agreed BY. {R.W. Bailey - Chief Engineer} MR. PLATFORD, 26.3.24, Agreed. EP. {G. Eric Platford - Chief Quality Engineer} MR. ELLIOTT, 27.3.24, Agreed. E. {Mr Elliott - Chief Engineer} MR. NORTHEY, 27.3.24, Agreed. PN. {Mr Northey} MR. HIVES, 8.4.24, Agreed. E.Hives. | ||