Variable Vector Propeller (VVP) is a new type thruster, which can be used to provide forces in any directions by adjusting pitch angle periodically.

• 全方向推进器是一种新型的推进装置，它最大特点是通过叶片螺距角在桨叶旋转的过程中周期性的改变可以产生任意方向的力。