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 EG2 Brade brushes for 40/50 & 'SS' Dynamos as an alternative to Le Carbone brushes.
| Identifier | WestWitteringFiles\T\March1929-December1929\ Scan031 | |
| Date | 14th March 1929 | |
| RR 755 REVISED (10H) (D.C.777-29-2-28) M/C C.LTD COMPLETED 9.7.29. STANDARDISATION of CHASSIS PARTS. Date 14.3.29 No. 7670 Drawing No. 8673 Part List Description of Parts. MORGANITE EG2 BRADE BRUSHES FOR 40/50 & 'SS{S. Smith}' DYNAMOS (as an alternative to present standard Grade Le Carbone brushes). Origin. Desirability of second source of supply - particularly a British source. Experimental Test Report. Morganite EG2 material is the nearest equivalent of Le Carbone grade Z., being hard graphitic and having a specific resistance of .0012 ohm. per inch cube. It has been carefully proved on the new 28 slot armatures that these brushes are equally good with standard. See report EFCl/T7.2.29 Road Test Report. Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. £ 0. 4. 5. Cost of New Part. £ 0. 4. 5½ Difference per Car. £ Negligible. Signature from Cost Dept. that above is correct. G/Rb.{R. Bowen} 6.7.29. Wor.{Arthur Wormald - General Works Manager} 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. [X marked] Cost of Parts in Works which will be scrapped if commenced on :- Series.........£......... Series.........£......... Series.........£......... INITIAL | DATE | REMARKS EXX SG.{Arthur F. Sidgreaves - MD} | 9.7.29 | Agreed. SG.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 18/3/29 | Agreed FHP but I should be very certain before changing if what we have is good enough. R WOR.{Arthur Wormald - General Works Manager} | 15.3.29 | Agreed. Wor.{Arthur Wormald - General Works Manager} Complete satisfaction. R RG.{Mr Rowledge} | 18.3.29 | Agreed. RG.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 22.3.29 | Agreed. DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 14.3.29 | Agreed. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 14.3.29 | What road tests taken re. 10,000 miles. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 16.3.29 | Agreed. E.{Mr Elliott - Chief Engineer} PN.{Mr Northey} | 27.5.29 | Agreed. PN.{Mr Northey} CWB. | | Hs.{Lord Ernest Hives - Chair} | 14.3.29 | Agreed. Hs.{Lord Ernest Hives - Chair} | ||