What happened to those VG's on the 737
No longer on the Max. From Flight International June 13-19...
"The new circular tailcone eliminates a set of four drag inducing vortex generators on the aft fuselage. These were added to correct a design problem discovered in flight test in the late-1960's. 'The airplane had a vertical bounce to it back in the day, and vortex generators were the aerodynamic fix that smooths that airflow, which stopped the bounce but was additional drag.'"