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・ M39
・ M39 Armored Utility Vehicle
・ M39 cannon
・ M20 recoilless rifle
・ M200
・ M2001
・ M201 railway (Croatia)
・ M2010 Enhanced Sniper Rifle
・ M202
・ M202 FLASH
・ M202 railway (Croatia)
・ M203 grenade launcher
・ M204
・ M205 tripod
・ M21
M21 mine
・ M21 Mortar Motor Carriage
・ M21 Sniper Weapon System
・ M213
・ M22
・ M22 Locust
・ M22 motorway (Northern Ireland)
・ M224 mortar
・ M23
・ M23 chemical mine
・ M23 derby
・ M23 motorway
・ M23 rebellion
・ M23 software distribution system
・ M230 chain gun


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M21 mine : ウィキペディア英語版
M21 mine
The M21 is a circular U.S. anti-tank landmine that uses a Misznay Schardin effect warhead. The mine uses an M607 pressure fuse, which can be adapted as a tilt rod fuze. The mine is triggered either by pressure, or by the tilt rod being forced beyond 20 degrees from the vertical by a force of more than 1.7 kg, either of these actions results in pressure being transferred via a bearing cap to a Belleville spring, which inverts, driving the firing pin into the M46 detonator. The M46 charge first ignites a black powder charge, which blows off the mine's cover, and clears any earth or debris that may have been on top of the mine. A fraction of a second later the main warhead detonates, driving and compressing a steel plate upwards, with enough force to penetrate 76 mm of armour at a distance of 530 mm. Approximately 200,000 M21 mines were produced in the U.S. and a licensed copies, the K441 and K442, were produced in South Korea.
==Specifications==

* Diameter: 229 mm
* Height: 206 mm
* Height with tilt rod: 813 mm
* Weight: 7.83 kg
* Explosive content: 4.9 kg of Composition H6
* Operating pressure:
*
* pressure: 132 kg
*
* tilt: 1.7 kg

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「M21 mine」の詳細全文を読む



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