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).
Outlining and comparing several different control schemes for dampers.
| Identifier | ExFiles\Box 16\5\ Scan056 | |
| Date | 8th March 1932 guessed | |
| (2) This however will probably be thought too impractical so we come down to earth unless strongly encouraged to stay aloft. * (b) A simpler and less ambitious scheme is the one we were working on where the control is by a quite small 1/8th. inch pipe to all the damper, where upon pressure being created extra loading is given to the single double-way relief valve by a close fitting (leather) piston pressing on the quick rated spring of the relief valve. (This scheme is the simplest progressive one and would be very easy to handle.) (c) Still simpler (as regards controlling apparatus) is to have this as a two or three stage scheme, by two oil pressures. (d) And the simplest of all is to have a two way cock on each damper operated by small steel wire rope (2 stage only). This requires two relief valves of our double way pattern on each damper. This is the only cable control that I can believe there is hope for - i.e. pull hard or let loose. It has just occurred to me that we might only need controls to the rear dampers - ' somewhat of a forlorn hope'. * I am sending to DA{Bernard Day - Chassis Design}/HDY.{William Hardy} some detail suggestions for sch. (c) which I favour (and recommend). R.{Sir Henry Royce} | ||