Induced drag
When an aircraft is flying faster than M 1.0, do the wingtip vortices still develop add to induced drag? Does induced drag exist at all at supersonic speeds?
Also; in ground effect, is upwash increased or decreased? Please explain, as different books state differently!
Does anyone know if I can get hold of a wind tunnel video that shows streamlines / smoke pulses at different speeds and AoA?
Thanks a bunch!