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).
Proposal to test two types of experimental sparking plugs during a 50-hour fuel economy test.
| Identifier | ExFiles\Box 58\2\ Scan233 | |
| Date | 2nd September 1935 | |
| x6.000. Mr. Underwood, A.I.D. Hs{Lord Ernest Hives - Chair}/Wst.3/MA.2.9.35. K.2635 50 HOUR FUEL ECONOMY TEST. We wish to try out on this test two types of experimental sparking plugs, 12 type 893B (K.L.G.) and 12 type X471B (Lodge). We believe these will perform more satisfactorily than the K.L.G.769B used on the 100 hour test. Will you please say if you agree to this procedure. Hs{Lord Ernest Hives - Chair}/Wst. | ||