Thrust force in the type of velocity
1. 
2. Error
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Direction of applied Thrust force
1. The thrust force is applied at the position of vehicle body
2. The direction of thrust force can be determined the piloting system.
- The piloting system has a dummy body on the position.
- The dummy body is connected to the vehicle body with the revolute joint.
- The z-axis of joint is defined as the rotational axis.
- The x-axis of joint is defined as the thrusting axis.
- The motion of joint is defined as piloting motion with the position level.
- The direction of thrust force is determined as the x-axis of joint.
