The invention relates to a flap wing
underwater and water surface
propeller, a navigator and a propelling method. The flap wing
underwater and water surface
propeller comprises a round base and four flap wings, wherein the four flap wings are arranged on the base and have the same size, each flap wing is sequentially and movably connected onto the base through horizontally installed
attack angle shafts and vertically installed swinging and
flapping shafts, in addition, each flap wing can singly and respectively rotate around the located
attack angle shafts and swinging and
flapping shafts for forming a two-freedom rotating mechanism, and the four swinging and
flapping shafts are set into the X-shaped
layout in an
axial symmetry way by using the center line of the base as the symmetry axis. Compared with the conventional
propeller propelling mode, the flap wing propelling mode provided by the invention has the advantages that the fluid performance is more complete, and the propelling efficiency is improved. Because the special turning maneuvering action, the
turning radius much smaller than that of the propeller propelling can be realized, and the maneuverability performance of the
underwater navigator is obviously improved. The flap wing propelling mode applied to the underwater navigator has smaller modification on the structure of the underwater navigator, in addition, the propelling efficiency and the maneuverability are better, and better application prospects are realized.