My h9 Suhkoi pulls hard to canopy when knifing to left.Is this just a characteristic?

Is it possible you're a little nose heavy? If so, and you trimmed for straight, level flight, there would be a bit of up elevator trimmed in. Then when you roll to either side... there's that up elevator, trimmed in, and now it's pulling you toward the canopy.

Just a thought.
Dave Olson

Do you have a elevator to rudder mix put in. If you do, I assume the values for each direction are the same. The Sukhoi pitches harder one way vs. the other. You have to have two different amounts of elevator for each direction of the rudder. If you dont have a mix then I dont know what is causeing it. Mine pitches to the belly both directions.

it will never be mix free IMO, just mix it out and have fun

On the subject of KE chractisitics, there are one or two planes I know that just need rudder only to KE, no elev, no alieron.

Mix it out using your fingers

Balsa Nova is one....what's the other?

Some Peter Miller designs can KE with rudd only, Toot Sweet and Fire Drake.

They are sport planes though, and plan builds, but some charactaristic of them must make them KE with no problems.

The Toot Sweet is a bi plane with with a straight wing with no taper, same chord and section all the way. No dihedral too. Lots of side area, its a box fuz but does taper to the back, Im not sure.

WHAT A BORING THREAD! CLOSE IT.