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2. Tethered Aerostat Radar System - Wikipedia

   en.wikipedia.org/wiki/Tethered_Aerostat_Radar_System

   The hull of the aerostat contains two parts separated by a gas-tight fabric partition. The upper chamber is filled with helium and provides the aerostat's lifting capability. The lower chamber of the hull is a pressurized air compartment. The hull is constructed of a lightweight polyurethane-coated Tedlar fabric. An airborne engine drives the ...

3. Balloon mail - Wikipedia

   en.wikipedia.org/wiki/Balloon_mail

   Balloon mail is often sent as part of a balloon competition. The balloon mail posts of Paris in 1870 The Louis Blanc, piloted by Eugène Farcot on 12 October 1870, was the 10th balloon mail of the 66 sent during the siege. Historically, balloons were used to transport mail from Paris during the Siege of Paris of 1870–1871. About 66 unguided ...

4. Aerostat - Wikipedia

   en.wikipedia.org/wiki/Aerostat

   A modern aerostat used by the U.S. Department of Homeland Security, the Tethered Aerostat Radar System (TARS). An aerostat (from Ancient Greek ἀήρ (aḗr) 'air' and στατός (statós) 'standing', via French) or lighter-than-air aircraft is an aircraft that relies on buoyancy to maintain flight.

5. Helium production in the United States - Wikipedia

   en.wikipedia.org/wiki/Helium_production_in_the...

   The US Army built the first helium extraction plant in 1915 at Petrolia, Texas, where a large natural gas field averaged nearly 1 percent helium. [6] The United States Navy established three experimental helium plants during World War I, to recover enough helium to supply barrage balloons with the non-flammable, lighter-than-air gas. Two of the ...

6. Tethered balloon - Wikipedia

   en.wikipedia.org/wiki/Tethered_balloon

   A balloon is a form of aerostat, along with the powered free-flying airship, although the American GAO has used the term "aerostat" to describe a tethered balloon in contrast to the powered airship. [1] Tethered balloons have been used for advertising, recreation, observation, and civil or military uses.

7. Hudson Valley Hot-Air Balloon Festival soars above Duchess ...

   www.aol.com/hudson-valley-hot-air-balloon...

   Balloon attendants showed the public how the mode of transportation works, and a few festgoers paid for the chance to soar high above Dutchess County in hot air balloons of all shapes and sizes.