| 摘要 |
A thrust vectorable fan variable area nozzle (FVAN) (28) includes a synchronizing ring (40), a static ring (42), and a flap assembly (44) mounted within a fan nacelle (32). An actuator assembly (48) selectively rotates synchronizing ring segments (40A ... 40D) relative the static ring (42) to adjust segments (44A ... 44D) of the flap assembly to vary the annular fan exit area and vector the thrust through asymmetrical movement of the thrust vectorable FVAN segments (28A ... 28D). In operation, adjustment of the entire periphery of the thrust vectorable FVAN (28) in which all segments (28A ... 28D) are moved simultaneously to maximize engine thrust and fuel economy during each flight regime. By separately adjusting the segments (28A ... 28D) of the thrust vectorable FVAN, engine trust is selectively vectored to provide, for example only, trim balance or thrust controlled maneuvering. |
