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The invention is a propulsion system for a V/STOL aircraft. In detail, the invention includes a turbo-fan engine having a fan section with a variable pitch fan, a compressor section, a combustion section, a turbine section, said turbine section having a low-pressure turbine portion coupled to and dr

The invention is a propulsion system for a V/STOL aircraft. In detail, the invention includes a turbo-fan engine having a fan section with a variable pitch fan, a compressor section, a combustion section, a turbine section, said turbine section having a low-pressure turbine portion coupled to and driving the fan section and a high-pressure turbine portion coupled to and driving the compressor section. The engine further having a selectable operating point wherein a portion of the power generatable by the low-pressure turbine at a selected operating power setting is extracted to drive the fan section. A turbine outlet duct is included for directing the turbine section exhaust gases. A first angular shaped nozzle section is co-incident with the turbine outlet duct for directing exhaust from the fan section. A second nozzle section mounted to the first angular shaped nozzle section between the fan section and the compressor section. A system is included to shift said selectable operating point of said engine to a second operating point at the selected power setting increasing the power extracted by the low-pressure turbine portion of the turbine section; such that power extracted by the low-pressure turbine portion and applied to the fan section can be increased without changing the selected power setting and the pitch of the blades of the variable pitch fan section can be increased to absorb the increased power.

대표청구항 ▼

The invention is a propulsion system for a V/STOL aircraft. In detail, the invention includes a turbo-fan engine having a fan section with a variable pitch fan, a compressor section, a combustion section, a turbine section, said turbine section having a low-pressure turbine portion coupled to and dr

The invention is a propulsion system for a V/STOL aircraft. In detail, the invention includes a turbo-fan engine having a fan section with a variable pitch fan, a compressor section, a combustion section, a turbine section, said turbine section having a low-pressure turbine portion coupled to and driving the fan section and a high-pressure turbine portion coupled to and driving the compressor section. The engine further having a selectable operating point wherein a portion of the power generatable by the low-pressure turbine at a selected operating power setting is extracted to drive the fan section. A turbine outlet duct is included for directing the turbine section exhaust gases. A first angular shaped nozzle section is co-incident with the turbine outlet duct for directing exhaust from the fan section. A second nozzle section mounted to the first angular shaped nozzle section between the fan section and the compressor section. A system is included to shift said selectable operating point of said engine to a second operating point at the selected power setting increasing the power extracted by the low-pressure turbine portion of the turbine section; such that power extracted by the low-pressure turbine portion and applied to the fan section can be increased without changing the selected power setting and the pitch of the blades of the variable pitch fan section can be increased to absorb the increased power. the web to produce a rolled product, one pair of the even set of end chucks begins winding the web to form another rolled product.6. The rewinder as set forth in claim 5, wherein the odd set of end chucks and the even set of end chucks have variable speed drives to control the position of the end chucks and rotation of the end chucks.7. The rewinder as set forth in claim 1, wherein the web transfer device is a vacuum belt.8. The rewinder as set forth in claim 1, further comprising an air blast device located proximate to the web transfer device for aiding transfer of the web from the web transfer device to the core.9. The rewinder as set forth in claim 1, further comprising a winding belt for assisting the web transfer device in surface winding the web onto the core, the core is located between the winding belt and the web transfer device while the web is wound onto the core to form a rolled product.10. The rewinder as set forth in claim 1, further comprising a cam communicating with the end chucks to move the end chucks and the core, the end chucks are urged against the cam in a vertical direction to compensate for changes in the diameter of the web wound onto the core.11. The rewinder as set forth in claim 1, wherein the speed of the core travel in the horizontal direction is varied during winding of the web onto the core in order to compensate for changes in the diameter of the web wound onto the core.12. The rewinder as set forth in claim 1, further comprising a bladder arrangement located on the end chucks to engage the core onto which the web is wound.13. A rewinder for winding a web to produce a rolled product having a core, comprising: a web transfer device for conveying a web, the web transfer device communicating with a core in order to wind the web onto the core to form a rolled product having the core; an air blast device located proximate to the web transfer device for aiding transfer of the web from the web transfer device to the core; an applicator located upstream from the air blast for applying adhesive to the web; and a tension roll located upstream from the applicator, the tension roll engages the web and applies tension to the web; wherein the web is wound onto the core by a combination of center winding and surface winding. 14. The rewinder as set forth in claim 13, wherein the web transfer device is a vacuum belt.15. The rewinder as set forth in claim 13, further comprising an odd set of a plurality of rotationally driven end chucks and an even set of a plurality of rotationally driven end chucks, the odd and even sets of end chucks staggered such that when one pair of the odd set of end chucks finishes winding the web to produce a rolled product, one pair of the even set of end chucks begins winding the web to form another rolled product.16. The rewinder as set forth in claim 13, wherein the applicator is disposed to apply adhesive to the leading edge of the web to assist in transfer of the web from the web transfer device onto the core.17. The rewinder as set forth in claim 16, wherein adhesive is further applied by the applicator to the trailing edge of the web to fix the trailing edge of the web onto the web that is wound on the core.18. A rewinder for winding a web to produce a rolled product comprising: a web transfer device for conveying a web; an odd set of a plurality of rotationally driven end chucks located proximate to the web transfer device for engaging a core onto which the web is wound; an even set of a plurality of rotationally driven end chucks located proximate to the web transfer device for engaging a core onto which the web is wound; and wherein the positioning and rotation of the odd set of end chucks is controlled independently from the positioning and rotation of the even set of end chucks. 19. The rewinder as set forth in claim 18, wherein the sets of chucks are staggered so that when one pair of the odd set of end chucks finishes winding the web to prod