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).
Diagnosing and resolving engine vibration in a limousine, distinguishing it from axle vibration.
| Identifier | ExFiles\Box 3\1\ 01-page078 | |
| Date | 16th January 1913 | |
| Mr Wormald. 16th January 1913. X181A C.J. from F.H.R. for T.C. I hear from Mr Northey that he is having trouble with his limousine with what is thought to be axle vibration. I do not think that it is axle vibration, but much more likely to be engine vibration, why ? If the axle it would always be there from the first trials, whereas engine crankshaft vibrations will come on after the engine has worn itself free. My own impression is that all our standard engines give a vibration at about 20 miles per hour, see previous sheets from Le CanadelHenry Royce's French residence and elsewhere, but I was told that it was a wind screen, which I did not believe. I had the impression that this did not exist with the Marine Engine, possibly owing to the short and stiff crankshaft. If no progress is made with Mr Northey's Limousine try very light piston, rods and cranks but no balance weights. If it is engine crank vibration this should alter the speed at which it exists. I did not see enough of the chains sent to Le CanadelHenry Royce's French residence to say more than that I thought the engine ran remarkably well at very high engine speeds, which was expected of the very light piston and rod and light | ||