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).
Test report on using V stay tubes to address an occasional radiator dither on a bumper chassis.
| Identifier | ExFiles\Box 119\2\ scan0347 | |
| Date | 6th June 1930 guessed | |
| managing on the cars so far fitted with diamond mounting engine mounting without it. V Test I The V stay tubes Fig III. There in France were found responsible for an occasional dither of the radiator, which was more pronounced without the bonnet. As this fault was not found with a single stay tube, the latter was adopted. No further tests being carried out with the V stay tubes. On the bumper chassis we have tried to reproduce this fault. The radiator movement in a vertical plane was quite good relative to the dash, but the bumper chassis having no body, the dash is not held by the inertia of the body, and in consequence is not nearly so steady as the dash of a complete car. From the front of the chassis there was a continual fidget of the radiator which had not previously been noticed. The bonnet at the rear took up the .125" clearance and without rubbers on the dash to Sd1517 bonnet tenons were audible. With these V Stay Tubes we tried various radiator control systems namely:- Sch 1529 with and without springs, spring without horizontal or sideways location to radiator cross-member and no control as fig II. We also bolted a 12 S.W.G triangular plate to the V stay tubes. From these test we soon realized that a complete car was necessary in order to obtain any reliable results. With the bumps stationary by pushing the radiator we found that the dash deflected just above where the L shaped brackets that carry the floor boards are bolted to it. | ||