rudder control
3.Prospects for “Engine-Propulsion Device-Rudder” (EPR) Omnidirectional Steering and Control System for Naval Crafts
7.When pilot directly control rudder, the load force relate not only displacement of control stick but also movement state of airplane and control stick, the pilot taste’s load force comprises aerodynamic force, inertia force, coulomb friction force, stickiness friction force and spring force, thereinto aerodynamic force is the most load force.

