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 showing a modification for slow running on Phantom II twin-choke carburettors.
| Identifier | ExFiles\Box 122\1\ scan0102 | |
| Date | 15th May 1931 | |
| MODIFICATION TO SLOW RUNNING ON TWIN CHOKE P.II CARBS. ECCENTRIC DISCHARGE HOLE IN ROTATING BRASS PLUG SCREW HEAD FOR ROTATING BRASS PLUG TO ADJUST TICK OVER MIXTURE THESE PASSAGES BLANKED [Stamp Text]: RECEIVED TEST ROOM 15 MAY 31 COPY [Initials]: APL | ||