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 Lodge Plugs Ltd. regarding the permissible length of a sample GB.14 spark plug barrel for a Wraith engine.
| Identifier | ExFiles\Box 162\6\ img355 | |
| Date | 22th April 1939 | |
| 6002 - EXPERIMENTAL DEPARTMENT. Rm{William Robotham - Chief Engineer}/RC.{R. Childs}9/JH. 22nd. April, 1939. Messrs. Lodge Plugs Ltd., RUGBY. For the attention of Mr. Martin Jones. Dear Sirs, Further to our phone conversation re the permissible length of the sparking plug barrel, we have now tested the sample GB.14 plug in a Wraith engine and find it quite suitable in this respect. This length must be regarded as a minimum, for this type of engine. We are returning the sample plug under separate cover. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||