Annular boosters on a Tunnel Ram
If you don’t have the book…a third grader can grasp this concept.
A bigger MAB starts the mains SOONER and leans the fuel curve at HIGH AIR FLOWS.
A smaller MAB starts the mains LATER and richens the fuel curve at HIGH AIR FLOWS.
Taylor explains it and Bewy argues it. Who to believe? I chose Taylor because it matches my testing.