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  2. Rocket sled - Wikipedia

    en.wikipedia.org/wiki/Rocket_sled

    The sled was then accelerated according to the experiment's design requirements for data collection along a length of isolated, precisely level and straight test track. Testing ejection seat systems and technology prior to their use in experimental or operational aircraft was a common application of the rocket sled at Holloman Air Force Base .

  3. High-altitude military parachuting - Wikipedia

    en.wikipedia.org/wiki/High-altitude_military...

    United States Air Force Pararescuemen jump at half the height of a typical HALO/HAHO insertion 2eme REP Legionnaires HALO jump from a C-160.. High-altitude military parachuting, or military free fall (MFF), is a method of delivering military personnel, military equipment, and other military supplies from a transport aircraft at a high altitude via free-fall parachute insertion.

  4. Qamutiik - Wikipedia

    en.wikipedia.org/wiki/Qamutiik

    British and American diaries and accounts from the 1800 and early 1900s tell how their explorers, determined to use conventional sleds, found that the pounding of the sea-ice jolted the sleds so that nails were expelled, and the sled fell to pieces within several miles of their start point. They adopted Inuit-style sleds.

  5. Rocket sled launch - Wikipedia

    en.wikipedia.org/wiki/Rocket_sled_launch

    A rocket sled launch, also known as ground-based launch assist, catapult launch assist, and sky-ramp launch, is a proposed method for launching space vehicles. With this concept the launch vehicle is supported by an eastward pointing rail or maglev track that goes up the side of a mountain while an externally applied force is used to accelerate ...

  6. Contrail - Wikipedia

    en.wikipedia.org/wiki/Contrail

    In 2011, a study of British meteorological records taken during World War II identified one event where the temperature was 0.8 °C (1.4 °F) higher than the day's average near airbases used by USAAF strategic bombers after they flew in a formation. However, its authors cautioned that this was a single event, making it difficult to draw firm ...

  7. Sledding - Wikipedia

    en.wikipedia.org/wiki/Sledding

    In a majority of these serious cases, young children are riding runner sleds in a prone position, and suffer hand and finger injuries when they are caught under the runners or between the sled and another object. [3] In addition, runner sleds force the weight of the rider onto two thin runners where the pressure causes a microscopic film of ...

  8. Sled - Wikipedia

    en.wikipedia.org/wiki/Sled

    Inflatable sled or tube, a plastic membrane filled with air to make a very lightweight sled, like an inner tube; Foam slider, a flat piece of durable foam with handles and a smooth underside; Backcountry sled, a deep, steerable plastic sled to kneel on with pads and a seat belt; Airboard, a snow bodyboard, i.e. an inflatable single-person sled [15]

  9. Ice sledge racing - Wikipedia

    en.wikipedia.org/wiki/Ice_sledge_racing

    Ice sledge racing is a Paralympic sport where contestants use a lightweight sledge and propel themselves using two poles. As a modern organized sport, it was available as a Paralympic sport between 1980–1988 and 1994–1998.