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  2. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    A fire hydrant marked as 3-inch. The inch (symbol: in or ″) is a unit of length in the British Imperial and the United States customary systems of measurement.It is equal to ⁠ 1 / 36 ⁠ yard or ⁠ 1 / 12 ⁠ of a foot.

  3. 38.1 cm /45 Model 1926 naval gun - Wikipedia

    en.wikipedia.org/wiki/38.1_cm_/45_Model_1926...

    The 38.1 cm/45 Model 1926 naval gun, also known as the Vickers-Armstrong 38.1 centimetres (15.0 in) Mark B, was originally intended to form the armament of the Brazilian battleship Riachuelo. Eighteen of the guns were subsequently purchased by Spain for use as coastal artillery.

  4. Medieval weights and measures - Wikipedia

    en.wikipedia.org/wiki/Medieval_weights_and_measures

    palme – Palm, for circumference, 8.86 cm; kvarter – Quarter, 1 ⁄ 4 alen; fod – Defined as a Rheinfuss 31.407 cm from 1683, before that 31.41 cm with variations. alen – Forearm, 2 fod; mil – Danish mile. Towards the end of the 17th century, Ole Rømer connected the mile to the circumference of the earth, and defined it as 12000 alen.

  5. QF 4-inch naval gun Mk IV, XII, XXII - Wikipedia

    en.wikipedia.org/wiki/QF_4-inch_naval_gun_Mk_IV...

    The QF 4-inch gun Mk IV [note 1] was the main gun on most Royal Navy and British Empire destroyers in World War I.It was introduced in 1911 as a faster-loading light gun successor to the BL 4 inch Mk VIII gun.

  6. 5-inch/54-caliber Mark 42 gun - Wikipedia

    en.wikipedia.org/wiki/5-inch/54-caliber_Mark_42_gun

    18.75 inches (476.2 mm) Elevation • -15°/+85° Maximum elevation rate: 25°/sec: Traverse • 150° from either side of centerline Maximum traversing rate: 40°/sec: Rate of fire: As built/designed: 40 rounds per minute automatic Down-rated to 28 rounds per minute in 1968: Muzzle velocity: 2,650 ft/s (807.7 m/s) Maximum firing range

  7. QF 4.5-inch howitzer - Wikipedia

    en.wikipedia.org/wiki/QF_4.5-inch_howitzer

    The Germans designated captured British guns as 11.4 cm leFH 361(e) and Russian guns as 11.5 cm leFH 362(r). [ 16 ] [ page needed ] 4.5-inch howitzers equipped British and Australian batteries in the Western Desert in 1940 and 1941 , and Australian units in Syria . [ 17 ]

  8. RML 10-inch 18-ton gun - Wikipedia

    en.wikipedia.org/wiki/RML_10-inch_18-ton_gun

    The 10 in (25 cm) gun was a standard "Woolwich" design (characterised by having a steel A tube with relatively few broad, rounded and shallow rifling grooves) developed in 1868, based on the successful Mk III 9 in (23 cm) gun, itself based on the "Fraser" system.

  9. QF 3.7-inch mountain howitzer - Wikipedia

    en.wikipedia.org/wiki/QF_3.7-inch_mountain_howitzer

    The 22nd (Derajat) Indian Frontier Force mountain battery arrived in the East Africa campaign on 18 December 1916, when they relieved the 28th Battery which returned to India. [4] They appear to have re-equipped from the 10-pounder mountain gun to the 3.7-inch howitzer while in East Africa, and first used the new weapon in action in an attack ...