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  2. MIM-23 Hawk - Wikipedia

    en.wikipedia.org/wiki/MIM-23_Hawk

    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 ...

  3. Catalytic heater - Wikipedia

    en.wikipedia.org/wiki/Catalytic_heater

    The following substances are able to help oxidize a fuel for a catalytic heater at a useful rate: Platinum can be used with natural gas, propane and butane. It generates a surface temperature of 300–550 °C, lower than the 760 °C ignition point. [6] Pt heaters are the most common type. [7] Palladium can be used with hydrogen gas.

  4. Jess (falconry) - Wikipedia

    en.wikipedia.org/wiki/Jess_(falconry)

    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.

  5. National Helium Reserve - Wikipedia

    en.wikipedia.org/wiki/National_Helium_Reserve

    The Crude Helium Enrichment Unit in the Cliffside Gas Field. Remnants of the Amarillo Helium Plant in 2015. The National Helium Reserve, also known as the Federal Helium Reserve, is a strategic reserve of the United States, which once held over 1 billion cubic meters (about 170,000,000 kg) [a] of helium gas.

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  7. Helium - Wikipedia

    en.wikipedia.org/wiki/Helium

    For this helium conservation program, the Bureau built a 425-mile (684 km) pipeline from Bushton, Kansas, to connect those plants with the government's partially depleted Cliffside gas field near Amarillo, Texas. This helium-nitrogen mixture was injected and stored in the Cliffside gas field until needed, at which time it was further purified. [75]

  8. Lawnchair Larry flight - Wikipedia

    en.wikipedia.org/wiki/Lawnchair_Larry_flight

    Cluster ballooning was inspired by Larry Walters's experience, although his was not the first. [1]On July 2, 1982, Larry Walters (April 19, 1949 – October 6, 1993) made a 45-minute flight in a homemade aerostat made of an ordinary lawn chair and 42 helium-filled weather balloons. [2]

  9. Helium storage and conservation - Wikipedia

    en.wikipedia.org/wiki/Helium_storage_and...

    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.

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