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 further information on special brushes sent for testing.
| Identifier | ExFiles\Box 166\1\ img012 | |
| Date | 9th November 1932 | |
| X6093. Hs{Lord Ernest Hives - Chair}/Wst.4/AD. November 9th, 1932. British Carbons Ltd. Crowther St, Bradford, Yorks. Dear Sirs, We have received your letter of the 2nd inst. dealing with special brushes which you have sent to us for test. We should be glad if you will give us additional information as follows:- (a) The contact drop for the Grade G.20 and grade G.7 brushes. (b) The coefficient of friction of the grades G.20 and G.7 brushes. We require these figures in order that we may obtain comparisons with our standard brushes. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||