| 摘要 |
<p>A cascade/clamshell thrust reverser combination for jet engines wherein the clamshell door in the full-forward thrust mode position, covers a cascade arrangement of vane members provided in the annular engine casing. For obtaining the thrust reverser mode, a track and pivot mechanism is employed. Initially, the door moves backwards on the track while simultaneously slightly rotating so that the total movement of the door follows a predetermined arc. During this initial movement the first portion of the vanes are gradually exposed. Upon continuation towards the full reverser mode, the door will move into a rotating movement thereby fully exposing all vanes and closing the forward thrust nozzle opening. The successive combined track/pivot movement to a pivot rotating movement allows for the maneuvering of a maximum large structural sized clamshell door within the multiple contoured confines of the exit casing, thereby providing the most optimum thrust reverser effect. The invention further resides in tailoring or varying the discharge angles of the vane members of the cascade from front to rear to maintain the effective discharge area for the engine essentially constant during inflight partial deployment of the clamshell door.</p> |
