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In January 1939 a specification was issued for a gun no heavier than 5.5 tons to replace the 6 inch 26 cwt howitzers in use with most medium batteries. For the desired range of 16,000 yards (15 km) ballistic studies recommended making a new calibre of 5.5 inches.
This can be confusing because it refers to two distinct measurements as if they were measured with the same unit. Normally one would think a 3 by 6 advertisement would be 3 inches wide by 6 inches high — but in reality it's actually about 5.5 inches wide by 6 inches high. In writing, an "×" is usually used to separate the two figures ...
The French scale, French gauge or Charrière system is commonly used to measure the size of a catheter.It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, FR or F.
There are many other sources of modelling aids for 5.5 mm scale. Siku's Super Series of vehicles are to 1/55 scale, while in the military modelling and wargaming world, 28mm scale (the height of a 6' tall figure) is a close match.
Point Metric size American system Continental system Chinese system American [4] British [1] French [5] German [6] Dutch Character Pinyin Meaning 1 ≈ 0.353 mm: American [a] ...
Since before World War II, 5 inches (127 mm) has been the standard gun caliber for U.S. Naval ships. Its rate of fire is lower than the British 4.5 in (114 mm) gun, but it fires a heavier 5-inch (127 mm) shell which carries a larger burst charge that increases its effectiveness against aircraft.
GMC's own V8 was the 637-cubic-inch (10.4 L) unit, which was essentially a 478 V6 with two cylinders added. It shared the 5.125 in × 3.86 in (130.2 mm × 98.0 mm) bore and stroke and used a single camshaft.
The Reagan administration made Letter-size paper the norm for US federal forms in the early 1980s; previously, the smaller "official" Government Letter size, 8 by 10.5 inches (203.2 by 266.7 mm) (aspect ratio: 1.3125), was used in government, while 8.5-by-11-inch (215.9 by 279.4 mm) paper was standard in most other offices. [2]