When testing with NASA in 1980, we mounted 8 smoke generators on our #1 Tristar. The test was for wake turbulence, a result of vortices... Here's a typical image.. We found that a Tweet couldn't get closer than 5 miles behind the L-1011 in this configuration, before it would be thrown out of the smoke trail.
Howsomever, by cycling the control wheel, which raised and lowered the spoilers on the wings, the Tweet could get as close as a mile behind the Tristar.
Passengers of course would probably object to the rolling of the plane on approach
From inside it looked this....