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 a 40/50 Dynamo with narrow brushes and an increased air gap from .015' to .020'.
| Identifier | ExFiles\Box 172\3\ img097 | |
| Date | 11th May 1927 | |
| RR 78B REVISED (10M) (DE 649 9-12-26) BM. 2/1167. ORIGINAL COMPLETED 30.5.27 STANDARDISATION of CHASSIS PARTS. Date 11.5.27 X No. 8671 Description of Parts. 40/50 DYNAMO OF TYPE WITH NARROW BRUSHES & INCREASED AIR GAP (.020" IN PLACE OF .015") Origin. Desirability of machine with better running characteristics from the point of view of heating, commutation and noise. Drawing No. Part List Experimental Test Report. See EFC1/T9. 5. 27. Road Test Report. Run on 7-EX, 10-EX and 12-EX total mileage of 40,000 miles. There have been no failures. We recommend they should be standardised. 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. Weight of Old Part. Cost of Old Part. £ Weight of New Part. Cost of New Part. £ Difference per Car. Negligible. Difference per Car. £ Negligible. Signature from Cost Dept. that above is correct. My/Ro.{C. C. Rose - Export Manager} 17.5.27 Cost of Parts in Works which will be scrapped if commenced on :- Series........£....... Series........£....... Series........£....... [Green stamp over text: ACTION] INITIAL | DATE | REMARKS BJ. | 30.5.27 | Agreed. B.Johnson. R.{Sir Henry Royce} | 13/5/27 | Agreed FAR WOR.{Arthur Wormald - General Works Manager} | 25.5.27 | Agreed. Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 13.5.27 | Agreed. Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 13.5.27 | Agreed. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 12.5.27 | Agreed. BY.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 11.5.27 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 12-5-27 | Agreed AElliott PN.{Mr Northey} | | CWB. | 12.5.27 | Agreed. CWB. HS.{Lord Ernest Hives - Chair} | 11.5.27 | Agreed. Hs.{Lord Ernest Hives - Chair} | ||