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).
Test report to determine the best 14mm sparking plug for slow running.
| Identifier | ExFiles\Box 3\4\ 04-page272 | |
| Date | 8th May 1933 | |
| FILES. ----- XHARP2/F.{Mr Friese} 8.5.33. ------- BEST SPARKING PLUG FOR SLOW RUNNING. --------------------------------- Tests were carried out on Hensport to determine which were the best 14 mm. plugs for slow running, and the conclusion reached was that the X.734 were on the whole the most satisfactory. Other plugs tested were, Lodge X.335, X.306, and X.318. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||