| 摘要 |
FIELD: aviation; designing of helicopter rotors. SUBSTANCE: rotor includes blades and two tubes. Upper tube is provided with vertical slots in its lower part for motion relative to lower tube and slots in upper part. Upper tube is fitted on lower tube with holes in lower portion. Axles are inserted in vertical slots of upper tube and in holes of lower tube. Four blocks are secured opposite slots in upper part of upper tube. Four seats with holes used for fitting the blades on threads for turning and extending the respective blade from its seat. Seats are articulated on the outside of upper tube opposite slots of upper part of upper tube, thus ensuring slightly lowered position of blades in their static state. At one end, ropes are articulated to inner tips of blades. Ropes are passed to blacks through holes of seats and slots of upper part of upper tube. These ropes are secured on upper portion of spring which is fitted screw and are passed along this spring at some margin for tension of spring. Ropes are secured to lower end of spring and to above-mentioned axles. Stops fitted under and above seats are used for limiting the blades angle. EFFECT: improved operational characteristics of rotor. 1 dwgb
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