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).
Page 2 of a letter from M. Raht discussing engine starting methods and a British patent application.
| Identifier | ExFiles\Box 142\3\ scan0145 | |
| Date | 3rd March 1937 guessed | |
| - 2 - ful at the very beginning of the starter operation, when the engine has been shut up. This is explained by the fact that all sparking plugs are kept free from outside moisture and the mixture too sucked in at the very first strokes is free from outside moisture condensation in the piping, which is harmful for the ignition operation as long as the engine is cold. As a consequence there is no opportunity for the sparking plugs and electrodes getting dirty by unsuccessful starting operations. Due to the immediate starting the battery (only) has to supply one third to one tenth of the electric power which is otherwise consumed usually for starting. For heavy duty aeroplane, engines similar conditions and similar advantages of shutting up the idle engine should be true. I have filed a British Patent Application No.7859/1936 to cover that method and I shall be glad if you would accept to use it at your engines. Yours faithfully M.{Mr Moon / Mr Moore} Raht M.{Mr Moon / Mr Moore} Raht | ||