| 摘要 |
In various embodiments, a cowl actuation system (371) may comprise a cowl (247,270;370;447,470), an actuator (372), a bell crank (374), and a guide arm (375). The cowl (247,270;370;447,470) may be configured to modulate at least a portion of the exhaust flow of a gas turbine engine (100;320;420). The bell crank (374) may have a first end (381) and a second end (383). The first end (381) may be operatively coupled to the actuator (372). The second end (383) may be operatively coupled to the cowl (247,270;370;447,470). The bell crank (374) may be configured to pivot about a first point located between the first end (381) and the second end (383). The first point may also be located along a diameter. The guide arm (375) may have a third end (385) and a fourth end (387). The third end (385) may be mounted to a second point. The fourth end (387) may be operatively coupled to the cowl (247,270;370;447,470). The second point may be located along the diameter. |
