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  2. Flight length - Wikipedia

    en.wikipedia.org/wiki/Flight_length

    The apparent curve of the route is a result of distortion when plotted onto a conventional map projection and makes the route appear to be longer than it really is. Stretching a string between North America and Japan on a globe will demonstrate why this really is the shortest route despite appearances.

  3. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound is how fast vibrations travel. At 20 °C (68 °F), the speed of sound in air, is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2.91 s or one mile in 4.69 s.

  4. Longest flights - Wikipedia

    en.wikipedia.org/wiki/Longest_flights

    These exceptionally long routes reduce the travel time between distant city pairs as well as the number of stops needed for passengers' travels, thereby increasing passenger convenience. [1] For an airline, choosing to operate long flights can also build brand image as well as loyalty among a set of flyers. [2]

  5. Atmospheric refraction - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_refraction

    Diagram showing displacement of the Sun's image at sunrise and sunset Comparison of inferior and superior mirages due to differing air refractive indices, n. Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. [1]

  6. Flight endurance record - Wikipedia

    en.wikipedia.org/wiki/Flight_endurance_record

    The current record for the longest non-stop, non-refueled airplane flight in history (9 days and 3 minutes) was achieved in the Rutan Voyager. The flight endurance record is the longest amount of time an aircraft of a particular category spent in flight without landing.

  7. 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.

  8. 2011 OPERA faster-than-light neutrino anomaly - Wikipedia

    en.wikipedia.org/wiki/2011_OPERA_faster-than...

    The travel time of the neutrinos had to be measured by tracking the time they were created, and the time they were detected, and using a common clock to ensure the times were in sync. As Fig. 1 shows, the time measuring system included the neutrino source at CERN, the detector at LNGS (Gran Sasso), and a satellite element common to both. The ...

  9. Wind triangle - Wikipedia

    en.wikipedia.org/wiki/Wind_triangle

    The wind triangle graphically represents the relationships among velocity vectors used for air navigation. In air navigation, the wind triangle is a graphical representation of the relationship between aircraft motion and wind. It is used extensively in dead reckoning navigation. The wind triangle is a vector diagram, with three vectors.

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