Torque is a force. Einstein's 'equal and opposite reaction' tells all. The torque from an aircraft propeller is substantial. An aeroplane however has substantial surfaces: main wings, tailplane and a fin all producing a reaction acting against the torque effect from a propeller and therefore it is not so noticeable. The torque is always there, as any tail wheel pilot knows. It is especially noticeable throughout the take-off phase when the pilot raises the tail. A helicopter has little surface area to oppose the torque and the tail rotor is very effective. The tail rotor also adds control to the pilot who often exploits the torque effect and the tail rotor to a benefit. You can change heading by simply rotating (yawing) in the hover.
A good experiment is to adapt a bicycle wheel (a handle on the axel) to use as a gyro. Spin it and attempt to change its plane of rotation, you will not find it easy but will learn a lot very simply.
Last edited by Fl1ingfrog; 1st Jun 2021 at 15:07.