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  2. Indicated airspeed - Wikipedia

    en.wikipedia.org/wiki/Indicated_airspeed

    Some airspeed indicators in aircraft prior to the mid-1970s indicate in miles per hour plus knots (1 knot = 1.15 mph) or kilometers per hour (1 knot = 1.85 km/h). A primary flight display with the indicated airspeed (IAS) displayed in the form of a vertical "tape" on the left.

  3. Muzzle velocity - Wikipedia

    en.wikipedia.org/wiki/Muzzle_velocity

    For projectiles in unpowered flight, its velocity is highest at leaving the muzzle and drops off steadily because of air resistance.Projectiles traveling less than the speed of sound (about 340 m/s (1,100 ft/s) in dry air at sea level) are subsonic, while those traveling faster are supersonic and thus can travel a substantial distance and even hit a target before a nearby observer hears the ...

  4. Airspeed - Wikipedia

    en.wikipedia.org/wiki/Airspeed

    Airspeed is commonly given in knots (kn). Since 2010, the International Civil Aviation Organization (ICAO) recommends using kilometers per hour (km/h) for airspeed (and meters per second for wind speed on runways), but allows using the de facto standard of knots, and has no set date on when to stop.

  5. Ballistics - Wikipedia

    en.wikipedia.org/wiki/Ballistics

    A photo of a Smith & Wesson revolver firing, taken with an ultra high speed air-gap flash. Using this sub-microsecond flash, the bullet can be imaged without motion blur. Ballistics is often broken down into the following four categories: [23] Internal ballistics the study of the processes originally accelerating projectiles

  6. Miles per hour - Wikipedia

    en.wikipedia.org/wiki/Miles_per_hour

    Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.

  7. Aviation call signs - Wikipedia

    en.wikipedia.org/wiki/Aviation_call_signs

    Aviation call signs or aircraft call signs are communication call signs assigned as unique identifiers referring to an aircraft. Call signs in aviation are derived from several different policies, depending upon the type of flight operation and whether or not the caller is in an aircraft or at a ground facility.

  8. These are the pedophile symbols you need to know to protect ...

    www.aol.com/news/2016-04-26-these-are-the...

    SEE ALSO: Mother horrified after learning what heart symbol on daughter's stuffed toy really meant A FBI document obtained by Wikileaks details the symbols and logos used by pedophiles to identify ...

  9. NATO Joint Military Symbology - Wikipedia

    en.wikipedia.org/wiki/NATO_Joint_Military_Symbology

    The first basic military map symbols began to be used by western armies in the decades following the end of the Napoleonic Wars.During World War I, there was a degree of harmonisation between the British and French systems, including the adoption of the colour red for enemy forces and blue for allies; the British had previously used red for friendly troops because of the traditional red coats ...