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).
Procedure for replacing Mercury plugs with Lodge plugs due to a supply shortage.
| Identifier | ExFiles\Box 162\6\ img036 | |
| Date | 20th July 1922 | |
| Sft.{Mr Swift} from BY.{R.W. Bailey - Chief Engineer} c. to Mr. Scott. c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to Chat. X.4425 BY2/P20.7.22. 40/50 PLUGS. X.4295 X.4425. In view of the fact that we have run out of Mercury plugs and are absolutely unable to obtain them at the moment the following procedure should be adopted:- (a) No more Mercury plugs should be sent away as spares. Six Lodge plugs should be used for this purpose. (b) We should continue to use six Lodge and six Mercury on the engine whilst Mercury plugs hold out. When these fail we must fit all Lodge. BY.{R.W. Bailey - Chief Engineer} | ||