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).
Methods to dampen axle and radiator movement, including frame stiffening and the use of Sorbo rubber.
| Identifier | ExFiles\Box 42\5\ Scan054 | |
| Date | 13th February 1930 | |
| Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}7/MJ.13.2.30.Contd. the radiator dither being exactly in step with the criss-cross axle period as we have always expected. Since we can find no means of preventing the axle having a criss-cross period the problem resolves itself into what part of the car we can use to damp the axle and the only portion having adequate moment of inertia is the body. We are therefore making the front of the frame as rigid in torsion as possible so that the pounding of the axle on the shock absorbers is carried back to the body where at the moment we are getting the best results by pulling the scuttle and dash solidly up to the strip of Sorbo rubber between them and getting as near single point body mounting at the back as possible. We also find spare wheels carried at the side materially reduce the amount of radiator movement as they add a bit of moment of inertia to the front of the frame. We will let you know when we have a more complete solution. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||