Main Metering System

Main metering cutaways: main metering jet and rod, power piston and spring, vacuum channel, main well and air bleeds, main discharge nozzle, boost and main venturi, and throttle valve. The later pages add pull-over enrichment fuel feeds, the primary and secondary power pistons with their springs, secondary metering rods and orifice plates, and the air valve and accelerator well tube.

What this section covers

• Main metering jet and rod
• Power piston and spring
• Main well air bleeds
• Main discharge nozzle and venturi
• Pull-over enrichment fuel feeds
• Secondary metering rods and orifice plates