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).
Note discussing modifications to shock dampers, replacing taper needles with ball valves for a Dubonnet system.
| Identifier | ExFiles\Box 154\1\ scan0225 | |
| Date | 13th December 1934 guessed | |
| Hs. {Lord Ernest Hives - Chair} 19 R IV Rm {William Robotham - Chief Engineer} At last Dubonnet has got tired of his taper needles and is just drawing out and making parts for fitting valves in the shock dampers. He is going to use ball valves, which I should be very surprised if they are quiet. Luvax people have designed a damper for use with the Dubonnet system on Standard Cars, which has a ball valve for the rebound stroke. Dubonnet is going to copy this. I wanted him to fit some Delco valves which I have taken out of the inertia control dampers which were on the front of 19 R IV when | ||