BASE jumping into a plane mid-air - GIF

[Duke_of_URL]

Matching airspeed would be vitally important in order to avoid serious bodily injury, or a 'big red splat,' inside the plane.

Notice on the video at 0:56 how the Pilatus PC-6 "Porter" aircraft appears to be in a fairly aggressive descent so as to achieve and maintain the prearranged "target" airspeed. The speed range of the PC-6 is from a Stall Speed @ 60mph, a Cruise Speed of 132mph, and a Maximum* Speed of 144mph (*the Pilatus "Do Not Exceed" Speed is 170mph). The Wingsuit Jumpers' velocities will range between 120mph in a "belly flat to the earth" position, and up to 180mph in a "head to earth/feet to sky" attitude. It would therefore seem the "target speed" for all participants is between 135-140mph. That answer would be interesting to know.

Dealing with the wing vortices when approaching the aircraft from behind would be harrowing enough, but making it though that tiny door opening would really be crazy, since all it would take is to bang ones head on the door frame hard enough to go unconscious then fall back out of the aircraft, tumbling out of control, until the parachute's automatic deployment mechanism activated around 250 feet. What amazes me even more than the daredevil stunt itself is that Red Bull convinced EASA (the EU's version of the "FAA") to allow it to occur in commercial airspace.