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A system and method of using a variable geometry ejector for a bleed air system using integral bleed pressure feedback which utilizes a minimal amount of high-pressure air, thus improving the overall engine cycle performance and is easily adaptable to a multitude of different engine types. This is a

A system and method of using a variable geometry ejector for a bleed air system using integral bleed pressure feedback which utilizes a minimal amount of high-pressure air, thus improving the overall engine cycle performance and is easily adaptable to a multitude of different engine types. This is accomplished through the use of a variable ejector using downstream pressure feedback to control the flow and pressure.

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A system and method of using a variable geometry ejector for a bleed air system using integral bleed pressure feedback which utilizes a minimal amount of high-pressure air, thus improving the overall engine cycle performance and is easily adaptable to a multitude of different engine types. This is a

A system and method of using a variable geometry ejector for a bleed air system using integral bleed pressure feedback which utilizes a minimal amount of high-pressure air, thus improving the overall engine cycle performance and is easily adaptable to a multitude of different engine types. This is accomplished through the use of a variable ejector using downstream pressure feedback to control the flow and pressure. d structure defines a transition zone for propelled crop directing the crop rearwardly from the outlet portions towards the receptacle opening, the transition zone including cleaning grate structure extending the preselected operating width. 7. The harvester as set forth in claim 1 wherein the receptacle opening extends generally across the operating width and provides unrestricted crop flow between the upper end portions and the receptacle opening through a cross-sectional area greater than a combined cross-sectional area of the upper end portions. 8. The harvester as set forth in claim 1 wherein the hood structure comprises debris separating structure extending continuously between the sides generally the entire operating width. 9. A harvester having a frame and including row units supported by the frame for removing crop from plants, a receptacle having a harvest position for receiving the crop and a raised dump position for unloading the crop, an air duct system including a plurality of upright ducts extending upwardly from the row units and receiving the removed crop, an air system for propelling the removed crop upwardly through the air ducts towards the receptacle, the upright ducts including outlet portions opening upwardly, and wherein the receptacle includes a forward receptacle opening, hood structure connected to the receptacle adjacent the receptacle opening, the hood structure opening rearwardly into the receptacle opening and extending over and opening downwardly over the outlet portions in crop receiving relationship thereto when the receptacle harvest position, the hood structure generally freely movable away from the outlet portions when the receptacle is moved from the harvest position toward the dump position; duct lift structure supporting the upright ducts for movement between an uppermost harvest position and a lowered transport position, the duct structure freely movable downwardly relative to the hood structure from a raised operating position to a retracted transport position; wherein the duct structure includes upper duct portions telescopingly received by lower duct portions, and the duct lift structure comprises an elongated connecting member supporting the upper duct portions and positively moving the upper duct portions vertically between raised field working and lowered transport positions; wherein the duct lift structure defines a substantially linear path of travel for elongated connecting member thereby facilitating telescoping of the upper duct portions relative to the lower duct portions free of binding; and wherein the duct lift structure comprises a lift frame extending vertically from the harvester frame, a sliding support slidably supported by the lift frame and carrying the connecting member, and first and second hydraulic cylinders connected to the sliding support and moving the support vertically along the lift frame. 10. A harvester having a frame and including row units supported by the frame for removing crop from plants, a receptacle with spaced side walls defining a receptacle width having a harvest position for receiving the crop and a raised dump position for unloading the crop, an air duct system including a plurality of upright ducts extending upwardly from the row units and receiving the removed crop, an air system for propelling the removed crop upwardly through the air ducts towards the receptacle, the upright ducts including outlet portions opening upwardly, and hood structure extending continuously between the walls generally the entire receptacle width, the hood structure opening into the receptacle and extending forwardly from the receptacle over the outlet portions in crop receiving relationship thereto when the receptacle is in the harvest position, a movable duct support connected to the upright ducts and moving the outlet portions between a raised operating position wherein, when the receptacle is in the harvest position, the outlet portions open into the hood in cotton conveying relationship thereto, and a transport position wherein the outlet portions are lowered from the operating position to thereby reduce transport height of the upright ducts. 11. The harvester as set forth in claim 10 wherein the upright ducts comprise telescoping sections including upper sections defining the outlet portions, the movable duct support includes an elongated support member extending between and connected to the upper sections, and cylinder structure connected to the elongated support and moving the upper sections generally in unison between the raised position and the transport position. 12. The harvester as set forth in claim 11 wherein the cylinder structure moves the upper sections along a generally upright linear path. 13. The harvester as set forth in claim 10 wherein the hood structure is freely movable away from the outlet portions with movement of the receptacle to the dump position. 14. The harvester as set forth in claim 10 wherein the hood structure includes a debris separating portion located above the outlet openings and extending generally uninterrupted over the receptacle width between the walls. 15. A harvester having a frame and including row units supported by the frame for removing crop from plants, a receptacle having a harvest position for receiving the crop and a raised dump position for unloading the crop, an air duct system including a plurality of upright ducts extending upwardly from the row units and receiving the removed crop, an air system for propelling the removed crop upwardly through the air ducts towards the receptacle, the upright ducts including outlet portions opening upwardly, and hood structure opening into the receptacle and extending forwardly from the receptacle over the outlet portions in crop receiving relationship thereto when the receptacle is in the harvest position, a movable duct support connected to the upright ducts and moving the outlet portions between a raised operating position wherein, when the receptacle is in the harvest position, the outlet portions open into the hood in cotton conveying relationship thereto, and a transport position wherein the outlet portions are located lowered from the operating position to thereby reduce transport height of the upright ducts; wherein the hood structure includes a debris separating portion located above the outlet openings; and wherein the debris separating portion includes panel structure and grate structure located above the outlet portions. 16. A harvester having a frame and including row units supported by the frame for removing crop from plants, a receptacle having a harvest position for receiving the crop and a raised dump position for unloading the crop, an air duct system including a plurality of upright ducts extending upwardly from the row units and receiving the removed crop, an air system for propelling the removed crop upwardly through the air ducts towards the receptacle, the upright ducts including outlet portions opening upwardly, and hood structure opening into the receptacle and extending forwardly from the receptacle over the outlet portions in crop receiving relationship thereto when the receptacle is in the harvest position, a movable duct support connected to the upright ducts and moving the outlet portions between a raised operating position wherein, when the receptacle is in the harvest position, the outlet portions open into the hood in cotton conveying relationship thereto, and a transport position wherein the outlet portions are located lowered from the operating position to thereby reduce transport height of the upright ducts; wherein the hood structure includes a debris separating portion located above the outlet openings; and wherein the debris separating portion extends generally uninterrupted between the outlet portions and has a total debris separating width substantially greater than a combined width of the upright ducts. 17. A harvester having a frame and including har