| 摘要 |
PURPOSE:To make it possible to change the diameter of a propeller and thereby alter propeller pitch by transferring propeller wings of a high skewed shape along guide grooves. CONSTITUTION:High skewed-shaped propeller wings 1 are installed in such a way that their root part is movable along guide grooves 2, so that the propeller wings can be transferred along the guide grooves by means of a driving equipment. Through the transfer of the propeller wings by means of the driving equipment, it is possible to alter the diameter and pitch of the propeller.
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