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  2. 4-6-2 - Wikipedia

    en.wikipedia.org/wiki/4-6-2

    The introduction of the 4-6-2 design in 1901 has been described as "a veritable milestone in locomotive progress". [3] On many railways worldwide, Pacific steam locomotives provided the motive power for express passenger trains throughout much of the early to mid-20th century, before either being superseded by larger types in the late 1940s and 1950s, or replaced by electric or diesel-electric ...

  3. List of pitch intervals - Wikipedia

    en.wikipedia.org/wiki/List_of_pitch_intervals

    The extremes of the meantone systems encountered in historical practice are the Pythagorean tuning, where the whole tone corresponds to 9:8, i.e. ⁠ (3:2) 2 / 2 ⁠, the mean of the major third ⁠ (3:2) 4 / 4 ⁠, and the fifth (3:2) is not tempered; and the 1 ⁄ 3-comma meantone, where the fifth is tempered to the extent that three ...

  4. League (unit) - Wikipedia

    en.wikipedia.org/wiki/League_(unit)

    However, the accepted number of Spanish nautical leagues to a degree varied between 14 1/6 to 16 2/3, so in actual practice the length of a Spanish nautical league was 25,733 feet (4.235 modern nautical miles) to 21,874 feet (3.600 modern nautical miles) respectively. [7]

  5. Hull speed - Wikipedia

    en.wikipedia.org/wiki/Hull_speed

    If the length of waterline is given in metres and desired hull speed in knots, the coefficient is 2.43 kn·m −½. The constant may be given as 1.34 to 1.51 knot·ft −½ in imperial units (depending on the source), or 4.50 to 5.07 km·h −1 ·m −½ in metric units, or 1.25 to 1.41 m·s −1 ·m −½ in SI units.

  6. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    19 cm = 1.9 dm – length of a banana; 26.3 cm = 2.6 dm – length of average male human foot; 29.98 cm = 2.998 dm – distance light in vacuum travels in one nanosecond; 30 cm = 3.0 dm – maximum leg length of a Goliath birdeater; 31 cm = 3.1 dm – wingspan of largest butterfly species Ornithoptera alexandrae

  7. Span (unit) - Wikipedia

    en.wikipedia.org/wiki/Span_(unit)

    Ancient Greek texts show that the span was used as a fixed measure in ancient Greece since at least archaic period.The word spithame (Greek: "σπιθαμή"), "span", [4] is attested in the work of Herodotus [5] in the 5th century BC; however, the span was used in Greece long before that, since the word trispithamos (Greek: "τρισπίθαμος"), "three spans long", [6] occurs as early as ...

  8. 16:9 aspect ratio - Wikipedia

    en.wikipedia.org/wiki/16:9_aspect_ratio

    The Community fund for the 16:9 Action Plan amounted to €228,000,000. Over a long period in the late 2000s and early 2010s, the computer industry switched from 4:3 to 16:10 (1.60:1) and then to 16:9 as the most common aspect ratio for monitors and laptops.

  9. Length overall - Wikipedia

    en.wikipedia.org/wiki/Length_overall

    Length overall (LOA, o/a, o.a. or oa) is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also used for calculating the cost of a marina berth [1] (for example, £2.50 per metre LOA).