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 modifications for slow running on Phantom II twin choke carburettors.
| Identifier | Morton\M19\ img170 | |
| 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 CWH/ ROLLS-ROYCE LIMITED LONDON 15 MAY 31 | ||