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).
Design schematics for a mechanical gauge and control valve assembly.
| Identifier | ExFiles\Box 147\1\ scan0160 | |
| Date | 1st May 1936 guessed | |
| N. 340111 Fig. 5 Fig. 6 Fig. 7 Fig. 8 Fig. 9 | ||