| 摘要 |
The rotor has four rows of blade mounts on its surface, the rows spaced 90 DEG apart. Each blade mount is a U-shaped metal strip welded to the rotor surface. The blade has a shank and is single side arm, the latter terminating in a laterally disposed cutting edge. The free end of the shank is screw threaded, the shank extending through the blade mount and being confined therein by a lock nut on the screw threaded end. Paddles are also mounted on the rotor in the same fashion and create windage. A link may be interposed between the blade and the blade mount where additional blade movement is desired.
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