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).
Elusive engine knock which is more pronounced when shorting a cylinder.
| Identifier | ExFiles\Box 48\1\ Scan114 | |
| Date | 9th December 1919 | |
| E.H. note & return X4190 EP{G. Eric Platford - Chief Quality Engineer} LE22/W9.12.19. Re. 19LW. (P.N. open trials) Mr. Holgate arrived at Conduit Street yesterday and found that when running this engine light there was a very elusive knock which cannot be shorted out, but it is noticed when shorting any cylinder it makes a knock much more pronounced. Under load the knock is not audible at all. Furthermore, the knock seems to be just the same when cold as when the engine is nice and hot. J.L.B. [STAMPED: TEST DEPT 13 DEC. 19 RECEIVED] | ||