Way back in 2010 the CrazyBall RC plane was born.  Here is the original video for its reference. The original material was foamboard but EPP made for a much lighter , more durable and repairable airframe.  Standard 6mm Depron was also an option. The motor of choice was a popular lower KV Blue Wonder  swinging a 10″ pro The XPS Prop shroud/annular p.wing was needed to keep the EPP from deforming as  well as give extra thrust and lift.  One problem with the design was in a hard crash the prop would sometimes scoop the XPS foam and dig it out in grooves limiting the life of the shroud. Due to the light weight and multiple lifting areas, the 90 watt motor could easily power the CrazyBall at only half throttle never getting outside its amp limit as full throttle was only needed for radical maneuvers.

   One of the  unique features of the CrazyBall was at half throttle, the plane actually flew like a free flight and with the battery in the lower novice position, it would fly as if it had a lot of dihedral and was quite stable. This uniqueness allowed one to not only launch it easily at half throttle but when in trouble, just release the controls at half throttle and the plane would simply right itself and continue flying  level rather than a crash.

   For the ‘pros’, the battery could be reinserted horizontal in the top of the battery slot making the craft not only symmetrical but balanced symmetrically as well. What aircraft can preform maneuvers in any direction with impunity? The CrazyBall was easily capable of most any 3D maneuver as well as a 4D candidate using variable pitch prop system for reverse pitch. There was also an inline twin motor version (sk’Eyeball) which did some excellent FPV work at slow hovering speeds when quads were in their infancy. You can see a video