| 摘要 |
In known contrarotating propellers, the transmission of power by two contrarotating shafts is expensive and susceptible to faults. In the contrarotating propeller according to the invention, the gearing that provides for speed reduction and contrarotation is located in one of the propeller bosses. In this way, a high propulsive efficiency is achieved at a low price, weight, and degree of susceptibility. <IMAGE>
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