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).
Letter to British Carbons Ltd. requesting specifications for various grades of brushes received for testing.
| Identifier | ExFiles\Box 166\1\ img007 | |
| Date | 18th October 1932 | |
| Hs{Lord Ernest Hives - Chair}/Wst.2/AD. October 18th, 1932. British Carbons Ltd. Crowther St, Bradford, YORKS. Dear Sirs, We have now received for test the various grades of brushes you have despatched to us. We are not sure, however, what the specification numbers refer to, for instance does G.20 mean that the brush in question is a Graphite brush with 20% Graphite? Perhaps you would be good enough to let us have exact specifications of all the grades you have sent us. Also will you kindly let us know what spring pressures you would advise for the operation of these brushes. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||