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).
20 HP car with underframe body suspension, comparing its performance in reducing chassis vibration.
| Identifier | ExFiles\Box 3\1\ 01-page115 | |
| Date | 14th July 1924 | |
| Extract from DA{Bernard Day - Chassis Design}/EV{Ivan Evernden - coachwork}4/14.7.24. +181 RE. VISIT TO SALES ON 10TH INST. X.3730 X.181. (1) 20 HP. UNDERFRAME BODY SUSPENSION, LANDAULET GF.68. EV.{Ivan Evernden - coachwork} went out in this car after having ridden in one of Barker's best examples of a closed 20 HP. R-R.{Sir Henry Royce} The difference between these two cars was very marked. The underframe suspension seemed to entirely prevent any of the high speed chassis vibrations from reaching the body, which at all speeds was perfectly quiet, and free from any suspicion of booming. By resting one foot on the chassis frame and the other on the body it was possible to appreciate how the forward rubber suspension isolated the body from the engine and transmission vibrations. We are working to perfect the details of this scheme and on their completion the car will be handed over to Hs.{Lord Ernest Hives - Chair} to be thoroughly tested, and EV.{Ivan Evernden - coachwork} hopes to find an opportunity shortly to shew the car to R.{Sir Henry Royce} One is inclined to believe that the underframe suspension as used by Daimlers has enabled them to build a town carriage which has given considerable satisfaction on what must be a rougher chassis than ours. DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} | ||