You should bind the “T” key. Make sure its a button you can reach and hold easily, I use the pinky button. The ka50 uses a flight control/autopilot system that helps keep the ac stable. If you look at the right knee panel you will see 4 blue buttons, with a 5th slightly right of them. 3 of those button should be “on” pitch, roll and yaw. Then you hold down the trim button, move the ac to the desired attitude and release it. I use another button for the alt control, and another for turn to tgt, which is on the left knee panel. There are also flight director, track, heading and ingress settings.
There are several different modes of fcs. Thats a too short and simple way of saying you should watch some youtube videos on trim.
The reason for all that is to reduce pilot workload. But if you don’t 100% understand the fcs and what its doing, you will think the ac is trying to kill you.