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The PT-91 Twardy ( Polish pronunciation: [ˈtfar.dɨ], English: Hard) is a Polish main battle tank. A development of the T-72M1, it entered service in 1995. The PT-91 was designed at the OBRUM ( Ośrodek Badawczo-Rozwojowy Urządzeń Mechanicznych, or Research and Development Centre for Mechanical Appliances) and is produced by the Bumar ...
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 ...
The Royal Canadian Air Force Exercise Plans are two exercise plans developed for the Royal Canadian Air Force (RCAF) by Dr. Bill Orban in the late 1950s, first published in 1961. [1] The 5BX plan (Five Basic Exercises) was developed for men; a corresponding program was developed for women under the name XBX (Ten Basic Exercises) and the two ...
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Physical training uniform. A physical training uniform is a military or organizational uniform used during exercise, calisthenics, drills, and in some cases, very casual periods of time (off-duty time during Initial Entry Training in the U.S. Army, for example). Most militaries, especially the United States Armed Forces and their auxiliaries (e ...
An Air Force Instruction ( AFI) is a documented instruction for members of the United States Air Force intended for use by active duty, guard, and reserve members and associated civilians. It is one of many forms of directives published by the Air Force Departmental Publishing Office (AFDPO). [1] In almost all cases, an Air Force Instruction is ...
The Stearman (Boeing) Model 75 is an American biplane formerly used as a military trainer aircraft, of which at least 10,626 were built in the United States during the 1930s and 1940s. [2] Stearman Aircraft became a subsidiary of Boeing in 1934. Widely known as the Stearman, Boeing Stearman, or Kaydet, it served as a primary trainer for the ...
For example, a 1990 U.S. Army technical manual stipulated that Class IV composition C-4 consists of 89.9±1% RDX, 10±1% polyisobutylene, and 0.2±0.02% dye that is itself made up of 90% lead chromate and 10% lamp black. [7] RDX classes A, B, E, and H are all suitable for use in C-4. Classes are measured by granulation. [10]