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Apparatus particularly useful in aircraft for moving a container from a supporting surface on a lower level, e.g., cargo hold, to a higher level, e.g., passenger compartment, via a vertical lift shaft, includes: a lift member in the vertical lift shaft, a displaceable suspension member suspended fro

Apparatus particularly useful in aircraft for moving a container from a supporting surface on a lower level, e.g., cargo hold, to a higher level, e.g., passenger compartment, via a vertical lift shaft, includes: a lift member in the vertical lift shaft, a displaceable suspension member suspended from and below the lift member and displaceable in a horizontal direction from a normal position in precise alignment with the vertical lift shaft; and a spring urging the displaceable suspension member to its normal position. A guiding element having an inclined guiding surface is carried by the displaceable suspension member and is effective, when engaged by a container during the downward movement of the lift member, to displace the displaceable suspension member and thereby to load the spring, such that when the container is lifted off the supporting surface during the upward movement of the lift member, the spring moves the displaceable suspension member, and the container engaged thereby, into precise alignment with the vertical lift shaft.

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Apparatus particularly useful in aircraft for moving a container from a supporting surface on a lower level, e.g., cargo hold, to a higher level, e.g., passenger compartment, via a vertical lift shaft, includes: a lift member in the vertical lift shaft, a displaceable suspension member suspended fro

Apparatus particularly useful in aircraft for moving a container from a supporting surface on a lower level, e.g., cargo hold, to a higher level, e.g., passenger compartment, via a vertical lift shaft, includes: a lift member in the vertical lift shaft, a displaceable suspension member suspended from and below the lift member and displaceable in a horizontal direction from a normal position in precise alignment with the vertical lift shaft; and a spring urging the displaceable suspension member to its normal position. A guiding element having an inclined guiding surface is carried by the displaceable suspension member and is effective, when engaged by a container during the downward movement of the lift member, to displace the displaceable suspension member and thereby to load the spring, such that when the container is lifted off the supporting surface during the upward movement of the lift member, the spring moves the displaceable suspension member, and the container engaged thereby, into precise alignment with the vertical lift shaft. n when the redirecting structure is in the inoperative disposition. 2. A unit according to claim 1, wherein the control slot is so dimensioned as to optimize back pressure generated by the cavity in the flow redirecting zone. 3. A unit according to claim 1, wherein the fan duct includes a fan duct well which supports fluid flow in the first flow path and the redirecting structure includes a duct wall portion which in the inoperative disposition of the redirecting structure forms part of the fan duct wall and supports flow in the first flow path whilst preventing flow in the second flow path and in the operative disposition of the redirecting structure occupies a position in which it presents a duct opening in the fan duct wall to allow flow in the second flow path. 4. The unit according to claim 3 wherein the cascade assembly extends across the second flow path in the region thereof between the duct opening and the cowl opening to control fluid flow in the second flow path. 5. A unit according to claim 3 wherein the duct wall portion in the operative disposition of the redirecting structure occupies an obstructing position in which it obstructs flow in the fan duct in the first flow path. 6. A unit according to claim 1 wherein the leading edge of the duct wall portion is so dimensioned and structured as to provide for choking of flow when it passes through the leakage slot and a consequent reduction in leakage flow through the slot. the duct wall portion in the obstructing position has its leading edge so positioned as to form a leakage slot providing controlled leakage flow in the first flow path. 7. A unit according to claim 6 wherein the redirecting wall portion extends from the leading edge of the duct wall portion to a forward end of a shelf portion of the redirecting structure. 8. A unit according to claim 7 wherein the inner and outer side boundaries of the cavity are formed by the shelf portion and the displaceable cowl portion. 9. A unit according to claim 8 wherein the cavity extends rearwardly to an end boundary formed by the duct wall portion. 10. A unit according to claim 8 wherein the shelf portion extends from the redirecting wall portion rearwardly to the duct wall portion to form with the redirecting wall portion and the duct wall portion a box structure. 11. A unit according to claim 10, wherein the cowl structure, the redirecting structure and the fan duct extend circumferentially around the turbofan unit, the fan duct comprises an inner duct wall which extends circumferentially around the unit and a radially outwardly spaced outer duct wall and the duct wall portion of the redirecting structure forms part of the outer duct wall. 12. A unit according to claim 10 wherein the redirecting structure includes sealing means to seal off the redirecting wall portion from fluid flow in the fan duct when the redirecting structure is in the inoperative disposition, and provision is made to allow fluid under static pressure from the fan duct to flow into the box structure when the redirecting structure is in the inoperative disposition to load the redirecting structure in the direction of the inoperative position. 13. An aircraft propulsive power unit comprising an efflux duct in which gaseous fluid is conducted in a predetermined first flow path for discharge from an exit end of the duct in the production of forward thrust, and a thrust reversing arrangement which in an operative disposition redirects gaseous fluid flowing in the first flow path into a second flow path to produce reverse thrust, wherein the reversing arrangement has a flow redirecting structure which is displaceable between an operative disposition and an inoperative disposition and which comprises a flow redirecting zone which intercepts fluid flow in the first flow path and redirects it into the second flow path when the redirecting structure moves to the operative disposition, the f low redirecting zone includes a redirecting wall portion which supports redirection of flow, the propulsive power unit is a turbofan power unit including a fan duct, the efflux duct is the fan duct of the turbofan unit, the redirecting wall portion forms part of a box structure, the redirecting structure includes sealing means to seal off the redirecting wall portion from fluid flow in the fan duct when the redirecting structure is in the inoperative disposition, and communication of fluid under static pressure from the fan duct to flow into the box structure when the redirecting structure is in the inoperative disposition, the communication loading the redirecting structure in the direction of the inoperative position. 14. A unit according to claim 13 wherein the cowl structure, the redirecting structure and the fan duct together form a first displaceable sub-assembly which extends round one half of the turbofan unit and a second displaceable sub-assembly which extends round the other half of the turbofan unit and the box structure comprises a first box portion which extends round the first displaceable sub-assembly and a second box portion which extends round the second displaceable sub-assembly. 15. A unit according to claim 14 wherein the first and second box portions are open ended to provide for the communication of fluid under static pressure from the fan duct to flow into the box portions to load the redirecting structure in the direction of the inoperative disposition.