Hi Sergey,

vortex generators on the top surface of the outboard wing? I have not put them on mine. If you are worried about elevator response on landing here are my suggestions based on my smaller hawk and what I have observed the best in the hobby do....

1. Avoid a nose heavy setup
2. Limit landing flap to no more than 30-40 degrees
3. Mix in some crow for full flap deployment....this improves stall resistance and will pitch the nose up so you will rely less on elevator trim
4. Don't get her too slow.