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).
Letter detailing technical issues and proposed solutions for dampers, valves, and glands.
| Identifier | ExFiles\Box 152\2\ scan0036 | |
| Date | 4th October 1937 guessed | |
| 2. Rm{William Robotham - Chief Engineer}/Les8/R.{Sir Henry Royce} and there has been one case where the ball and spring change places. It would be better if the spring was longer, and the ball was guided to its seat on a taper. We have had one damper which had a curious knock on the reversal of a long stroke. We changed every part of the damper separately and found the trouble was due to over-sizebore of the cylinders. We changed the casings and cured the trouble. It, therefore, appears that the replenishing valves are scarcely large enough. As our own replenishing valve is very simple and perfectly reliable we do not want to be let down by such as small part. We would like to try some pistons having replenishing valves exactly similar to our dampers. When putting washers under the valves to produce a leak for low speed riding, we find that the radius on the valve sleeve, (486 - Z ) prevents the valve having a consistent leak. An undercut in flange would overcome the trouble. We have had a case where the main gland has come out of the damper casing. This we presume was due to the effect of oil expanding the rubber. It will be interesting to try the glands which are not effective by oil. I am looking forward to seeing you at the show. Yours sincerley, for ROLLS-ROYCE LTD. Attach. FB.3164. FB.3121. FB.3122. FB.3095. FB.3096. FB.3111. FB.3112. FB.3093. FB.3094. | ||