A new type of liquid propeller named half-rotating biological propeller is based on principle of Weis-Fogh effect realized by half-rotating mechanism

and it’s different from ordinary propeller. A model experiment was essential to study thoroughly the ways of operation

how much force it can bring out and propulsive efficiency etc. A reasonable model experiment was planned. The experiment data

which were acquired through data acquisition card NI DAQPad-6020E

were processed and analyzed by Matlab Software. The conclusion shows that the highest propulsive efficiency adds up to 70.5%

the mean propulsive efficiency is about 51% when the space between the blade and fixed flat is 11cm

the depth of blade under the water is 30cm

and the input frequency of motor is 50Hz.