FIELD: water transport; oar propulsion of vessels. SUBSTANCE: oar has shank with oarlock and blade made in form of semibalanced rudder from rigid plate secured on vertical axle connected with shank by means of lever and spring and located in bush at end of shank. Plate is provided with float made in form of baffle to avoid suction of air from surface. EFFECT: enhanced efficiency. 3 dwg
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|---|---|---|---|
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