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  2. Amateur rocketry - Wikipedia

    en.wikipedia.org/wiki/Amateur_rocketry

    An appalling accident rate [5] led individuals such as G. Harry Stine and Vernon Estes to make model rocketry a safe and widespread hobby by developing and publishing the National Association of Rocketry Model Rocket Safety Code, and by commercially producing safe, professionally designed and manufactured model rocket motors. Model rocketry by ...

  3. Hybrid-propellant rocket - Wikipedia

    en.wikipedia.org/wiki/Hybrid-propellant_rocket

    The first work on hybrid rockets was performed in the early 1930s at the Soviet Group for the Study of Reactive Motion. Mikhail Klavdievich Tikhonravov, who would later supervise the design of Sputnik I and the Luna programme, was responsible for the first hybrid propelled rocket launch, the GIRD-9, on 17 August 1933, which reached an altitude of 400 metres (1,300 ft).

  4. Homebuilt machines - Wikipedia

    en.wikipedia.org/wiki/Homebuilt_machines

    Amateur rocketeers have been responsible for significant research into hybrid rocket motors, and have built and flown a variety of solid, liquid, and hybrid propellant motors. On May 17, 2004 Civilian Space eXploration Team (CSXT) successfully launched the first amateur high-power rocket into space, achieving an altitude of 72 miles (115 km). [3]

  5. RocketMotorTwo - Wikipedia

    en.wikipedia.org/wiki/RocketMotorTwo

    RocketMotorTwo is a hybrid rocket engine utilizing solid hydroxyl-terminated polybutadiene (HTPB) fuel and liquid nitrous oxide oxidizer – sometimes referred to as an N 2 O/HTPB motor [8] [9] – providing 70,000 pounds-force (310 kN) of thrust. [10] The design makes use of lessons learned during the development of the SpaceShipOne hybrid ...

  6. TM65 - Wikipedia

    en.wikipedia.org/wiki/TM65

    Construction of the prototype rocket engine Tordenskjold 65 (TM65) was started in the fall of 2010 [5] after a range of successful tests with its predecessor XLR-3A. [1] The project was run parallel to Copenhagen Suborbitals hybrid rocket engine project that was used to power the HEAT-1X rocket and its payload Tycho Brahe.

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  8. Hybrid rocket fuel regression - Wikipedia

    en.wikipedia.org/wiki/Hybrid_Rocket_Fuel_Regression

    Hybrid rocket fuel regression refers to the process by which the fuel grain of a hybrid-propellant rocket is converted from a solid to a gas that is combusted. It encompasses the regression rate, the distance that the fuel surface recedes over a given time, as well as the burn area, the surface area that is being eroded at a given moment.

  9. Today's Wordle Hint, Answer for #1273 on Friday, December 13 ...

    www.aol.com/todays-wordle-hint-answer-1273...

    If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1273 ahead. Let's start with a few hints.

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