| 摘要 |
A propeller device is provided with a propeller which can rotate about an axle and a substantially stationary vane- like element which is arranged behind the propeller and forms an angle which decreases in the direction towards the rear with the drive direction, in order to at least partially convert the rotational energy of the propeller jet from the propeller into a propulsive force. The vane- like element is made from a thin plate of at least approximately constant thickness. Furthermore, it is arranged in a jet pipe and is attached to the inside of this pipe. The vane-like element considerably improves the propeller efficiency. Scale tests have already achieved an improvement in efficiency of 24%.
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