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).
Extract concerning sourcing insulators to manufacture sparking plugs for the 'Eagle' 'B' engine.
| Identifier | ExFiles\Box 34\3\ Scan002 | |
| Date | 15th September 1916 | |
| R.R. 489 a (100 T) (S C. 836 15-9-16) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1516. EHL/D8916. EXTRACT FROM "EAGLE" "B" ENGINE X. NO X.2635 We have taken the insulator out of the Bosch plug and have sent it away to see if we can get anything like it If it is possible to get the insulator then I think we might consider making the sparking plug because we shall soon be using 24 plugs to each engine and two dozen spares which cost 6/- each so that each engine costs £14,8, 0 for plugs. Attached herewith is chart giving H.P. and .consumption during run. | ||