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  2. Quarter midget racing - Wikipedia

    en.wikipedia.org/wiki/Quarter_Midget_racing

    Quarter midget racing is a form of automobile racing. The cars are approximately one-quarter (1 ⁄ 4) the size of a full-size midget car. The adult-size midget being raced during the start of quarter midget racing used an oval track of one-fifth of a mile in length. The child's quarter midget track is one quarter that length, or 1 ⁄ 20 mile ...

  3. SpaceX Raptor - Wikipedia

    en.wikipedia.org/wiki/SpaceX_Raptor

    The concept evolved from a family of Raptor-designated rocket engines (2012) [45] to focus on the full-size Raptor engine (2014). [ 46 ] In January 2016, the US Air Force awarded a US$33.6 million development contract to SpaceX to develop a prototype Raptor for use on the upper stage of Falcon 9 and Falcon Heavy .

  4. Pratt & Whitney F119 - Wikipedia

    en.wikipedia.org/wiki/Pratt_&_Whitney_F119

    The Pratt & Whitney F119, company designation PW5000, is an afterburning turbofan engine developed by Pratt & Whitney for the Advanced Tactical Fighter (ATF) program, which resulted in the Lockheed Martin F-22 Raptor.

  5. Quarter midget - Wikipedia

    en.wikipedia.org/?title=Quarter_midget&redirect=no

    This page was last edited on 22 September 2021, at 23:32 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  6. Midget car racing - Wikipedia

    en.wikipedia.org/wiki/Midget_car_racing

    Midget cars racing at Angell Park Speedway in Sun Prairie, Wisconsin. Midget cars, also Speedcars in Australia, is a class of racing cars. The cars are very small with a very high power-to-weight ratio and typically use four cylinder engines. They originated in the United States in the 1930s and are raced on most continents.

  7. SpaceX Starship design history - Wikipedia

    en.wikipedia.org/wiki/SpaceX_Starship_design_history

    Over the years of design, the proportion of sea-level engines to vacuum engines on the second stage varied drastically. By 2019, the second stage design had settled on six Raptor engines—three optimized for sea-level and three optimized for vacuum. [21] [22] To decrease weight, aft flaps on the second stage were reduced from three to two. [23]

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