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  2. Radar speed gun - Wikipedia

    en.wikipedia.org/wiki/Radar_speed_gun

    A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles while conducting traffic enforcement , and in professional sports to measure speeds such as those of baseball pitches , [ 1 ] tennis serves , and ...

  3. Muzzle velocity - Wikipedia

    en.wikipedia.org/wiki/Muzzle_velocity

    In some instances, the powder may not have even been fully burned in guns with short barrels. So, the muzzle velocity of a 2-inch (51 mm) barrel is less than that of a 4-inch (100 mm) barrel, which is less than that of a 6-inch (150 mm) barrel. Large naval guns will have high length-to-diameter ratios, ranging between 38:1 to 50:1. This length ...

  4. Speed limit enforcement - Wikipedia

    en.wikipedia.org/wiki/Speed_limit_enforcement

    Radar speed guns use a microwave signal that is directed at a vehicle; the Doppler effect is used to derive its speed. LIDAR speed guns utilize the time of flight of laser pulses to make a series of timestamped measurements of a vehicle's distance from the laser; the data is then used to calculate the vehicle's speed. [20]

  5. Talk:Radar speed gun - Wikipedia

    en.wikipedia.org/wiki/Talk:Radar_speed_gun

    The radar speed gun was invented by Bryce K. Brown of Decatur Electronics in March 1954,[2] and was first used in Chicago, Illinois in April 1954.[citation needed] Patrolman Leonard Baldy was the first officer to issue a speeding ticket using the new device.

  6. Speargun - Wikipedia

    en.wikipedia.org/wiki/Speargun

    The trigger mechanism (which is at the back of the gun) has a handle/grip below it or midway up the gun. Once at the required pressure the spear is forced down the barrel to engage the trigger mechanism and is then loaded and ready. There will usually be a strong line at least twice the length of the gun connecting the spear to the front of the ...

  7. Road speed limit enforcement in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Road_speed_limit...

    Gatso speed camera on a dual carriageway showing characteristic road markings. In March 2005 a BBC program Inside Out demonstrated how the LTI 20.20 LIDAR speed gun, of which 3,500 were in use in the UK, could create exaggerated reading. Errors came from two sources.

  8. LIDAR speed gun - Wikipedia

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

    From a page move: This is a redirect from a page that has been moved (renamed).This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.

  9. Modelguns - Wikipedia

    en.wikipedia.org/wiki/Modelguns

    Modelguns are Japanese replica or toy guns, which are usually made of zinc alloys or plastic materials. Most modelguns commonly available today are designed to highly replicate the physical appearance (some bear the authentic trademarks and markings too) and in full scale of the real gun counterpart.

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