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).
Decision to discontinue the use of Stellite tipped Bentley sparking plugs in favour of standard nickel manganese.
| Identifier | ExFiles\Box 162\4\ img029 | |
| Date | 13th January 1934 | |
| 81918e. By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Roy.{Sir Henry Royce} Hs{Lord Ernest Hives - Chair}/Wst.4/MA.13.1.34. STELLITED SPARKING PLUGS. We have decided to drop the Stellite tipped Bentley sparking plug electrode in favour of the standard nickel manganese for the reasons that :- (a) The stellite tip causes the plug to run slightly hotter. (b) Stelliting increases the manufacturing cost of the plug appreciably. (c) The slight advantage gained when using leaded fuels does not warrant its introduction when (a) and (b) are taken into account. Also the Bentley Chassis in customers hands will not necessarily be running all the time using leaded fuels. We have already informed Major Carington of the K.L.G.Co., of this decision. Hs{Lord Ernest Hives - Chair}/Wst. | ||