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).
The test results of Igna-Segrave sparking plugs on a 20 HP engine.
Identifier | ExFiles\Box 58\2\ Scan004 | |
Date | 9th January 1930 | |
81812a. To RCY. From Hs{Lord Ernest Hives - Chair}/ACL. Hs{Lord Ernest Hives - Chair}/ACL.1/MJ.9.1.30. IGNA SPARKING PLUGS - SEGRAVE TYPE. We have carried out some tests on the test bed with the Igna-Segrave sparking plugs on one of our 20 HP. engines but failed to find any advantage over our standard plugs. At full throttle running we experienced preignition. We therefore do not think it worth continuing experiments with these plugs at the moment, in view of the fact that we are satisfied with our present supplies. Hs{Lord Ernest Hives - Chair}/ACL. | ||