Vtol
I'm in the processs of building a saucer like on your right hand drawing, I'm using four OS.25 FPs in a 3" thick 42" diameter foam disk. I'm looking at 7-7.5lbs with fuel. I have the programing in my radio for both a "X" and "+" motor configuration and will probably try it in "+" first. The "+" configuration was much easier to program. I have seperate throttle on each enginr for fore/aft and left/right control as well as lift and sink(collective). I have vanes in each engine area for twist or for a helo what would be rudder control. I won't have it done for at least a month so it'll be a while before I can say if it'll fly or not....