Winding – tensioning – or guiding – Reeling device – With particular drive
Patent
1992-11-24
1998-09-22
Nguyen, John Q.
Winding, tensioning, or guiding
Reeling device
With particular drive
244 1TD, B65H 7548, B64C 0000
Patent
active
058102760
ABSTRACT:
A turbine head assembly is provided for use with an aerial tow reel assembly. The turbine head includes permanently open aft exhaust ports and a turbine assembly upstream of the exhaust port. The turbine head assembly features a housing with an open inlet. A split balanced butterfly valve assembly is provided at the open inlet of the housing. An actuation assembly drives a pair of baffle doors about a vertical axis with the baffle doors being arranged so as to automatically rotate inward into a closed position whenever there is a power outage in flight. This fail-safe feature avoids turbine overspeeding. The actuation assembly is positioned closer to the inlet and the butterfly valve assembly than to the turbine assembly. This placement of the actuation assembly closer to the inlet allows for the use of a gear assembly with a complimentary torque arrangement which is quick to respond to sensed changes in cable speed by a control system which signals the motor to vary the degree to which the baffle doors allow air to enter the air passageway leading to the turbine blades. The actuation assembly is also placed external to the guiding wall of the air passageway as well as the outer skin of the nacelle housing. A streamlined housing covers the portion of the actuation assembly extending outward from the nacelle's outer skin. The cover and actuation assembly are positioned above the top of the baffle doors. Also, an additional fail-safe feature is provided in the control system to sense levelwind operation failure.
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AGTS-36 Alternative Powerhead Prototype Demonstration Test Report, TMC Document No. 35-1, Nov. 15, 1985.
Fiske Erik A.
Presson Earl W.
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