No, thats what I meant to say. That in a nutshell is why a smaller MAB discourages fuel flow to the nozzle, and a larger MAB encourages fuel flow to the nozzle.
That’s what emulsion is all about. More emulsion adds more fuel to the main well which makes the fuel light and encourages flow to the nozzle.
The concept is the same with the MAB. More air (bigger MAB) the fuel is lighter and starts flow to the booster with less pressure drop across the booster. Less air (smaller MAB) the fuel is heavier and starts flow to the booster with more pressure drop across the booster.
There is ALWAYS a pressure drop across the booster when the engine is running. It’s easy to see how a good annular booster can use a much smaller MAB because the booster itself will encourage fuel flow from the main well sooner because at the same pressure drop pressure drop across the annular booster verses a down leg. Or a lesser annular booster.
And obviously it will require a smaller main jet with the annular booster because the signal loss across the annular booster is less with the smaller MAB.