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).
Schematic diagram of a Zenith carburettor's slow running system.
| Identifier | ExFiles\Box 122\1\ scan0103 | |
| Date | 14th May 1931 | |
| ZENITH SLOW RUNNING SCH THROTTLE EDGE TOP DISCHARGE HOLE FOUR AIR HOLES DRILLED DOWN TO INTAKE SMALL DISCHARGE HOLE ABOVE THROTTLE. DISCHARGE HOLE WITH MOVEABLE RESTRICTIONS UNCOVERED WHEN THROTTLE IS SLIGHTLY OPENED. AIR BLEED ADJ. SCREW IDLING JET JET TUBE [Stamp Text] VIST ROOM 14 MAY 31 col | ||