Design truck for paraglider was preceded by just the fascination of paragliding, which did not come at once. First flew airplanes (and flight certificate), gliders. But one day, fly a paraglider, got into it seriously. I think it is comparable to swimming to sailing. Only even better.
First, like most parable-Aristov, used for takeoff and landing conventional three-wheeled cart. Not going to say much about all her faults (they are known to the pilots para-glider). But the most unpleasant of them tipping forward and sideways with insufficient management skills dome on takeoff and landing. But for experienced paraglider on a truck is not immune from stalling—for example, when a side gust of wind. And this is very dangerous because the rollover more likely, the higher the speed, i.e. during takeoff and especially during landing.