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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. Lidar traffic enforcement - Wikipedia

    en.wikipedia.org/wiki/LIDAR_traffic_enforcement

    A typical NHTSA approved [7] device weighs less than 2 kilograms, is battery powered, has speed detection accuracy +2 km/h and -3 km/h, distance accuracy +- 0.3 metres at 90 metres, and minimum long-range measurement capability of 300 metres. Devices must be capable of meeting these accuracy standards while exposed to ambient temperatures ...

  4. Speed limit enforcement - Wikipedia

    en.wikipedia.org/wiki/Speed_limit_enforcement

    [54] [55] An alternative view is that police devices are accurate to 1 km/h, and that a 2–3 km/h tolerance is the minimum margin that police require to defeat any challenge in court regarding the accuracy of their speed measurement equipment. [56]

  5. 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 ...

  6. 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.

  7. Traffic enforcement camera - Wikipedia

    en.wikipedia.org/wiki/Traffic_enforcement_camera

    Rather than simply testing speed accuracy, the systems are all tested in real traffic situations some of which are created specifically to test a perceived weakness in the systems. Track and real road testing is always conducted so that all kinds of vehicles and traffic situations are used to stimulate the systems. Roadside equipment such as ...

  8. The Best Cordless Nail Guns to Speed Up Your Projects - AOL

    www.aol.com/best-cordless-nail-guns-speeding...

    With that in mind, we tested cordless nail guns to find the best. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Mail. Sign in ...

  9. 16-inch/50-caliber Mark 7 gun - Wikipedia

    en.wikipedia.org/wiki/16-inch/50-caliber_Mark_7_gun

    Complementing the 16-in/50 caliber Mark 7 gun was a fire control computer, the Ford Instrument Company Mark 8 Range Keeper. This analog computer was used to direct the fire from the battleship's big guns, taking into account factors including the speed of the targeted ship, the projectile's travel time, and air resistance.