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).
Continuation page of a document condemning a permanent restriction in a piston valve due to its inefficiency in the vacuum system.
| Identifier | ExFiles\Box 40\3\ Scan074 | |
| Date | 8th June 1928 guessed | |
| Contd :- -3- piston valve. We condemn the permanent restriction owing to the very great drop it necessitates in the efficiency of the vacuum system. Hs{Lord Ernest Hives - Chair}/A.J.Lidsey. | ||