you could technicly do 1, but this is somewhat pointless, as gps accuracy is at best +- 10 m. you should set the loiter radus dependant on the plane, and wp radus dependant on your groundspeed and max bank angle. so you get nice curved turns between your 90 degree wp's
I am flying a 3dr quad. I had to change the speed of flight because it took off yesterday and overshot the target by a long ways. Thanks for the answer I was just wondering if it had reached the radius of the way point if it would think that it was there and then continue on to the next way point. With the limited amount of space I had I was trying to get it as close as possible.