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).
Cross-section diagram showing the modification of passage sizes from a float-chamber to variable valves.
| Identifier | ExFiles\Box 13\3\ 03-page291 | |
| Date | 28th July 1934 guessed | |
| V1005 2 HOLES DRILL .213 DIA TAP 26 TPI RH{R. Hollingworth} FOR OTHER DIMENSIONS SEE (ER1436) SECTION EE MODIFICATION OF SIZE OF PASSAGES FROM FLOAT-CHAMBER TO VARIABLE VALVES | ||