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).
Report page discussing damper levers, patent situations, road tests, and piston dampers.
| Identifier | WestWitteringFiles\V\December1930-February1931\ Scan196 | |
| Date | 30th January 1931 guessed | |
| - 4 - blocking up the leaks being shewn on Sheet 3 where double the maximum pressure is reached in the same time with no more damping. SHORT DAMPER LEVERS. There appears to be little doubt that these high loads are used on the rebound to prevent the axle-leaving the frame to anything approaching the free camber of the spring, though we have yet to confirm the extent on the road. This enables short damper arms to be used and appears to be a practical means of overcoming the difficulty. An alternative would be to cut off the valve port when the piston approaches the cylinder end. The extra weight of the damper is perhaps justified if a sling with its attachments can be avoided. PATENT SITUATION. R.R. have a patent for spring loaded connections between the shock damper and axle. The piston is the last link in the chain of connections. It is therefore very doubtful if 'Delco's' can get a patent for their spring loaded split piston in this country. ROAD TESTS. The dampers used for this investigation are exactly as tried by Hs.{Lord Ernest Hives - Chair} on an American P.I. car and reported to have given good results. We have a complete set from America of the same type, incorporating an adjustable leak. These we are fitting to a P.II. and also obtaining diagrams and will report on the results in due course. R.R. DOUBLE PISTON DAMPER. This is going forward well and should be on test in about three weeks' time. | ||