FIELD: aircraft engineering.
SUBSTANCE: invention relates to aircraft engineering and can be used for helicopters with jet control system. Control mechanism of flaps of tricuspid nozzle with controlled thrust vector consists of toothed sector of middle flap position control, side flaps control levers, central rocker, engaged by rods with levers of side flaps. Central rocker is engaged with toothed sector of middle flap, wherein gear ratio from middle flap to central rocker is 0.70–0.78. Arms of central rocker have length of 0.3–0.4 width of nozzle inlet section and opening angle of arms 140–150°. Levers of side flaps have arms of length of 0.3–0.35 and 0.4–0.45 of nozzle inlet cross-section width and angle of inclination 50°–55° and 55°–60° respectively, and thrusts of levers of side flaps are 0.5–0.55 and 0.4–0.45 of nozzle inlet cross-section width.
EFFECT: reduced pressure losses in nozzle and improved its efficiency, providing required for each flight mode ratio of side and propulsion forces.
1 cl, 7 dwg
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