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  2. Human-powered aircraft - Wikipedia

    en.wikipedia.org/wiki/Human-powered_aircraft

    A human-powered aircraft (HPA) is an aircraft belonging to the class of vehicles known as human-powered transport.. As its name suggests, HPAs have the pilot not only steer, but power the aircraft (usually propeller-driven) by means of a system similar to a bicycle or tricycle: a pair of pedals, moved by the pilot's feet that turns a gear, which then moves a bicycle chain, which then rotates a ...

  3. Airsoft gun - Wikipedia

    en.wikipedia.org/wiki/Airsoft_gun

    Airsoft is safe when played with proper protective gear. Most airsoft guns on the market are usually below 350 ft/s (110 m/s), but projectiles expelled from any type of airsoft gun can travel as slow as 65 ft/s (20 m/s) to more than 700 ft/s (210 m/s) and are capable of breaking skin at 350–400 ft/s (110–120 m/s).

  4. Airsoft - Wikipedia

    en.wikipedia.org/wiki/Airsoft

    These HPA replicas are most often referred to as "PolarStars", although this refers to a popular brand of HPA engines and accessories. A typical airsoft gun is noticeably lighter than its "real steel" counterpart due to the use of aluminum alloy and plastic materials, though some have added weights in them for a more realistic feel.

  5. List of human-powered aircraft - Wikipedia

    en.wikipedia.org/wiki/List_of_human-powered_aircraft

    The 27th Japan International Birdman Rally (JIBR) HPA section won, 34.654 km. Pilot was not exhausted but took water by organizer direction because the HPA reached end of flyable area (southwest side of Lake Biwa) (Jul. 2003) – straight-distance record in JIBR. Japanese record set under the FAI rules. 11.874 km / 46 min 40 s (Aug. 2004).

  6. List of aircraft engine manufacturers - Wikipedia

    en.wikipedia.org/wiki/List_of_aircraft_engine...

    This is a list of aircraft engine manufacturers both past and present. 0–9. 2si ...

  7. de Havilland Gipsy - Wikipedia

    en.wikipedia.org/wiki/De_Havilland_Gipsy

    In 1925 Geoffrey de Havilland was looking for a reliable cheap engine for use in a light sports aircraft. More particularly, he was looking for something like his favourite First World War aircraft engine: the 240 hp (180 kW) Renault 8G air-cooled V8, but with half the weight and half the power. Halford gave it to him by building a four ...

  8. Air gun - Wikipedia

    en.wikipedia.org/wiki/Air_gun

    A para-athlete competing with a match air rifle A collection of lever-action, spring-piston air rifles. An air gun or airgun is a gun that uses energy from compressed air or other gases that are mechanically pressurized and then released to propel and accelerate projectiles, similar to the principle of the primitive blowgun.

  9. Thielert Centurion - Wikipedia

    en.wikipedia.org/wiki/Thielert_Centurion

    Centurion 1.7 installation in a Diamond DA42 Centurion 1.7 (TAE 125-01) The first product introduced by Thielert, a 1689 cm³ (103 in³) engine producing 135 PS (99 kW) is an inline-four engine based on the Mercedes-Benz OM668 from Mercedes-Benz A-Class A 170 CDI (W168) with 80 mm bore and 84 mm stroke.