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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.
  
  


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