[wrench]

If it were a contrail, that shape is only possible from a center line thrust aircraft. Problem with that theory is there are no centerline thrust aircraft used in the flight profile being touted as the “answer”. Only acft like 747, 757, 767, airbus 3XX, etc.

[SeeSac]

If it were a contrail, that shape is only possible from a center line thrust aircraft. Problem with that theory is there are no centerline thrust aircraft used in the flight profile being touted as the “answer”. Only acft like 747, 757, 767, airbus 3XX, etc.

How about this one?