The movie should begin playing as soon as download is complete. It will not play completely until download is complete. Click and drag thumb button on control bar to study movie. They were prototype point-defense interceptors intended for the Navy, and their sole virtue was that they didn't need a runway.
Helicopters do much the same thing.
Unlike helicopters, however, the Tail Sitters eschewed the complications and performance limitations of rotor blades, which must hinge, twist, and flex to simultaneously act as lifting and thrusting surfaces in forward flight. The Tail Sitters transitioned from helicopter to airplane by simply pushing over from the vertical ascent to conventional horizontal flight. This Sighting, digitized from a Convair promotional film, shows the Convair XFY-1 Pogo taking off from Brown Field, San Diego.