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 of a slow running scheme for a twin choke carburettor.
| Identifier | Morton\M19\ img232 | |
| Date | 16th February 1931 | |
| V.1058 ADJUSTING SCREW TO BE FIXED TIGHT WITH GUIDE & SPRING IN POSITION. SLOW RUNNING SCHEME. (TWIN CHOKE CARB.) PI L.H. 16-2-31 | ||