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).
Troubleshooting an engine vibration issue by testing engine belts and front suspension components.
| Identifier | ExFiles\Box 3\1\ 01-page085 | |
| Date | ||
| -4- While we were running, we slacked off the rear engine belts and this cured the vibrations. We tightened them up again & it was still not there, we had lost it. This puzzled us for a bit until we found it was due to the engine being pulled over at the back by the belt & twisting the joints in our front engine suspension. When we made these free again, the vibration came back. We then went a step further by supporting the engine under the bottom of the wheelcase on a kn{D. G. McKechnie - Sales} edge so as to take the load off the pins. This made the vibration worse and was not nearly as bad as the car. With this result, we went back again to the car with the idea that it was a torsional vibration of the crankchamber, so we tightened up our front engine suspension but it made no difference, we put the front pedestal off the test engine & bolted to the outside of the frame & supported the car on this this simply put the speed up the same as putting jacks under. We are now continuing our investigations on the test plate, we put on these by bolting the engine up solid all round, make it excellent for vibration, we intend to gradually build it up as near, first with the standard rear engine foot, then supported in a bare frame and so on, until we find the bit that causes the peddod. We should welcome any suggestions. | ||