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).
And blueprint concerning a sticking shock-damper ball valve causing noisy hydraulics.
| Identifier | ExFiles\Box 68\2\ scan0240 | |
| Date | 12th December 1928 guessed | |
| contd :- -2- We think this may be the cause of some complaints of noisy hydraulics. We should like the point to be watched on production and test. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} STICKING SHOCK-DAMPER BALL VALVE | ||