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).
Blueprint detailing a modification to a sleeve for a variable valve on a twin choke carburettor.
| Identifier | ExFiles\Box 13\3\ 03-page281 | |
| Date | 26th February 1931 | |
| V1059 .100 CRS 3 HOLES EQUALLY SPACED DRILL .066 DIA. FOR ALL OTHER DIMENSIONS SEE E 81748. MODn. TO SLEEVE (VARIABLE VALVE) TWIN CHOKE CARB. P.O L4.C 26.2.31 | ||