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).
The approval and testing of Chromidium brake drums.
| Identifier | ExFiles\Box 120\1\ scan0198 | |
| Date | 7th July 1937 | |
| To Rm.{William Robotham - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} File 1028 Hs.{Lord Ernest Hives - Chair}20/KW.7.7.37. MARTINDALE (crossed out) See me Rm{William Robotham - Chief Engineer} Chromidium Brake Drums. Fitted to 32 Ex in France still on 33 Ex 3 BIV I agree to chromidium brake drums as long as you have satisfied yourself that they will be entirely satisfactory. I assume that we have done more running with these than one test in France. A point I should be interested in is whether the Midland Cylinder Co. are supplying these chromidium brake drums to any other car or 'bus manufacturers. London General Omnibus, AEC Albion, Bristol, Dennis, Morris Hs.{Lord Ernest Hives - Chair} Comm, Dodge, Scammell Vauxhall, Wolseley, Lagonda | ||