I've found another shockwave shadow on the other side
Nah, it isn't what you think it is
, ' cos this one is on the sunny side of the aircraft, and its evidence of a different shockwave I think
It is linear, and in high speed cruise appears to run just 2.5m from centre wingroot adjacent to the rearmost 737NG wing emergency exit, diagonally forward to where the engine pod and leading edge meet.
I reckon that means there are actually two roughly parallel shockwaves about 1.5m apart on the broad part of the wing inboard of the engine - can anyone confirm?