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 second source of supply.
| Identifier | ExFiles\Box 172\2\ img020 | |
| Date | 25th March 1924 | |
| RR 755 (10M) (SL391 2-11-23) MP 281297 ORIGINAL COMPLETED 23.4.24. STANDARDISATION of CHASSIS PARTS. 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. EFC6/T22.10.23. EFC3/T10.12.23 and AB.96. Road Test Report. Extract from EFC9/T9.1.24. "We now have further evidence on examination of a set of these brushes running on a dynamo on 7-G-11, that EG.2 Morganite 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". 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 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. £ 11d. increase. Signature of Mr. De LOOZE that above is correct. M/JW 26324 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 R.{Sir Henry Royce} 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.{Mr Elliott - Chief Engineer} Hives. | ||