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A jess (plural "jesses") is a thin strap, traditionally made from leather, used to tether a hawk, falcon, or owl in falconry. [1] Jesses allow a falconer to keep control of a bird while it is on the glove or in training, and allow a bird to be secured on a perch outside its aviary.
Hawk XXI (Hawk 21) The Hawk XXI or Hawk-21 is a more advanced, and more compact version of Hawk PIP-3 upgrade. Hawk-XXI basically eliminates the PAR and CWAR radars with the introduction of 3D MPQ-64 Sentinel radars. Norway's Kongsberg Company provides an FDC (Fire Distribution Center) as it is used in NASAMS system in Norway. The missiles are ...
Like Walters, Couch had a BB gun on hand to shoot the balloons in order to initiate descent. After the flight, he developed a way to release helium from the balloons, allowing for a more controlled descent. [10] [23] During a second flight on July 5, 2008, Couch realized his goal of interstate travel when he landed safely in western Idaho. The ...
The DHL Balloon was the world's largest tethered helium balloon. A tethered, moored or captive balloon is a balloon that is restrained by one or more tethers attached to the ground so it cannot float freely. The base of the tether is wound around the drum of a winch, which may be fixed or mounted on a vehicle, and is used to raise and lower the ...
In addition, German U-boats operating in the North Atlantic Ocean were a constant menace to shipping routes in the North Atlantic making it very hazardous for merchant shipping between Newfoundland and Great Britain. [8] Larger aircraft could be flown to the UK and the Atlantic Ferry Organization was set up to manage this using civilian pilots.
The platen then drops and the hot knife is removed. After the hot knife is completely clear of the straps the platen comes back up and compresses the joint so that the melted portions of the strap mix and harden. For thicker plastic strap, usually 0.73 mm (0.029 in) and thicker, friction is used to create heat within the joint.
Helium storage and conservation is a process of maintaining supplies of helium and preventing wasteful loss. Helium is commercially produced as a byproduct of natural gas extraction. Until the mid-1990s, the United States Bureau of Mines operated a large scale helium storage facility to support government requirements for helium.
The purpose of a HAWK beacon is to allow protected pedestrian crossings, stopping vehicular traffic only as needed. The HAWK beacon is a type of traffic control alternative to traffic control signals and/or where an intersection does not meet traffic signal warrants. [1]: 509 A HAWK beacon is used only for marked crosswalks.
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