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Also referred to as air attack. The use of aircraft in support of ground resources to combat wildfires, often most effective in initial attack in light fuels. air drop The delivery of supplies or fire retardant from the air. Supplies can be dropped by parachute, while retardant is generally released in a single drop of one or more trails, the size of which is determined by the wind and the ...
An early naval cannon, which is allowed to roll backwards slightly when fired, and therefore must be tethered with strong ropes. Recoil (often called knockback, kickback or simply kick) is the rearward thrust generated when a gun is being discharged.
3D zone control: The strategy of 3D zone control intended to improve the safety of firefighters operating inside a burning structure.It attempts to safeguard the immediate locality of any space occupied by firefighters in resorting to various defensive actions that (a) confine the fire; (b) remove combustion products safely and effectively; or (c) mitigate dangers in the hot-gas layers.
Ready to fire position. Bolt is locked to barrel, both are fully forward. Upon firing, bolt and barrel recoil backwards a short distance while locked together. Near the end of the barrel travel, the bolt and barrel unlock. The barrel stops, but the unlocked bolt continues to move to the rear, ejecting the empty shell and compressing the recoil ...
The notion of fire as a tool had somewhat evolved by the late 1970s as the National Park Service authorized and administered controlled burns. [67] Following prescribed fire reintroduction, the Yellowstone fires of 1988 occurred, which significantly politicized fire management. The ensuing media coverage was a spectacle that was vulnerable to ...
An M40 recoilless rifle on its M79 "wheelbarrow" tripod Diagram of the operation of a recoilless rifle using a vented case. A recoilless rifle (), recoilless launcher (), or simply recoilless gun, sometimes abbreviated to "RR" or "RCL" (for ReCoilLess) [1] is a type of lightweight artillery system or man-portable launcher that is designed to eject some form of countermass such as propellant ...
Enfilade: a unit (or position) is "enfiladed" when enemy fire can be directed along the long axis of the unit. For instance, a trench is enfiladed if the enemy can fire down the length of the trench. May also refer to placing a unit in a position to enfilade, or the position so enfiladed. Envelope
Diagram of recoil mechanism, British 60-pounder gun Mk.I, 1916 The idea of using a water brake to counteract the recoil of naval cannons was first suggested to the British Admiralty by Carl Wilhelm Siemens in early 1870s, but it took about a decade for other people (primarily Josiah Vavasseur) to commercialize the idea.