im thinking of building one and was qurious about flight characteristics ,flatspin knife edge,the best power for the plane.if anyone has plese post pictures.tx

The HB is a good sport flyer that will do all basic maneuvers, but is not an advanced aerobatic design. For all-out stunt flying look elsewhere (Pitts, Ultimate, Eagle, etc). Anything from a 60 2-stroke to 100 4-stroke will power it fine.

I no its not a ultimate but can it flat spin ,inside and outside loop