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).
Mitigating wheel wobble and tramping speed through design and testing.
| Identifier | WestWitteringFiles\N\2July1925-September1925\ Scan81 | |
| Date | 11th August 1920 | |
| R.R. 235A (100 T) (S.H. 159, 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 (2) I am nearly certain that whatever we do in the way of proportioning the weights and positions of the relative parts of the wheels and axles, we shall get a tendency to wobble when the tramping speed synchronises with the road wheel speed, but we want to be sure of this. As you know we can lower the tramping speed by lower pressure in the tyres, and in a less degree by weak road springs, but do we know that with the lightest axle without brakes we can pass the tramping speed without wobbles, because if so, there are possi-bilities in design. We do not now think changes in the position and angles of the pivots within practical ranges will help us, but you should repeat the tests with vertical pivots, these being almost exactly within the tread. R.{Sir Henry Royce} | ||