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).
Tests to eliminate engine pulsations on a 4-Goshawk-11 car.
| Identifier | WestWitteringFiles\I\September1922\ Scan80 | |
| Date | 1st September 1922 | |
| To H.{Arthur M. Hanbury - Head Complaints} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to HY.{Tom Haldenby - Plant Engineer} ORIGINAL Hs{Lord Ernest Hives - Chair}2/LGR1.9.22. 4-GOSHAWK-11 - ENGINE PULSATIONS. X4264 X634 We have been carrying out tests in connection with the pulsation period which occurs at 20 m.p.h. on this car. We find that if we support the engine on pads of soft rubber ½" thick under the rear feet and we also disconnect the steering support tube from the frame, we can entirely eliminate the vibration at that speed. We appear to bring up a slight vibration at 10 to 11 m.p.h. but this is not very noticeable. If we have the rubber under the engine feet and have the steering support tube bolted to the frame, the vibrations are still very noticeable. We also find with the engine bolted solid in the frame, that if we disconnect the connection of the steering tube, we noticeably reduce the vibration at 20 m.p.h. although we do not cure it. This would appear another reason why it would be desirable to adopt the new type of steering mounting as soon as possible. Hs.{Lord Ernest Hives - Chair} | ||