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).
Modifications to controllable dampers for 40/50 cars.
| Identifier | ExFiles\Box 16\5\ Scan191 | |
| Date | 13th June 1934 | |
| L 7520 To By: c. to R.{Sir Henry Royce} c. to Hdy.{William Hardy} c. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}/Les.2/KW.13.6.34. 40/50 Cars with Controllable Dampers. We find the riding of the above cars can be greatly improved by the following modifications to the dampers. Will you please arrange for these to be incorporated on production immediately. (1) Grooves in the tops of the pistons exactly similar to the present 25 HP. dampers. (2) .020" diametrical clearance for the valve damping disc. The larger bore pump in the governor unit .812" dia. and the larger area valves in the unit should be incorporated when ordering up new material. All these items have run 10,000 miles so there is very little risk in adopting these improvements. Hs{Lord Ernest Hives - Chair}/I.A.Leslie. | ||