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  2. Little David - Wikipedia

    en.wikipedia.org/wiki/Little_David

    "Little David" 36 inch (914 mm) mortar emplacement at Aberdeen Proving Ground, Maryland. After the Siegfried Line was breached with conventional forces, Little David was instead considered for use against the extremely strong fortifications during the expected invasion of Japan. The decision was made to test for this purpose, but the end of the ...

  3. History of military ballooning - Wikipedia

    en.wikipedia.org/wiki/History_of_military_ballooning

    Balloons and generators were loaded onto the USS George Washington Parke Custis, a converted coal barge. The balloons were towed down the Potomac River and were able to ascend and make observations of the battle front as it moved toward Richmond. On November 11, 1861, Lowe made the first observations from a balloon based from a ship.

  4. Lifting gas - Wikipedia

    en.wikipedia.org/wiki/Lifting_gas

    A balloon can only have buoyancy if there is a medium that has a higher average density than the balloon itself. Balloons cannot work on the Moon because it has almost no atmosphere. [14] Mars has a very thin atmosphere – the pressure is only 1 ⁄ 160 of earth atmospheric pressure – so a huge balloon would be needed even for a tiny lifting ...

  5. Balloonfest '86 - Wikipedia

    en.wikipedia.org/wiki/Balloonfest_'86

    The 1988 edition of The Guinness Book of World Records recognizes the event as a world record "largest ever mass balloon release", with 1,429,643 balloons launched. [10] [11] Guinness no longer measures balloon releases. [12] Balloonfest '86 was the subject of the 2017 short documentary film Balloonfest. [13]

  6. 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]

  7. Water balloon - Wikipedia

    en.wikipedia.org/wiki/Water_balloon

    Yo-yo balloons, also known as Yo-yo Tsuris, are a common type of water balloon found at matsuri festivals in Japan. Typically small, round, and colourful, the balloons are filled to a diameter of about 75 mm (3 in) with air and roughly 45 mL (1.6 imp fl oz; 1.5 US fl oz) of water. [ 9 ]

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