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In Chapter 14 of the Mojing, the traction trebuchet is described hurling hollowed out logs filled with burning charcoal at enemy troops. [2] Trebuchets mounted on wheels were said to have needed 200 men to pull each of them. [9] By the Qin and Han dynasties, traction trebuchets were a common weapon used in both attack and defense.
The Journal of Electronic Defense reported that "plasma-cloud-generation technology for stealth applications" developed in Russia reduces an aircraft's RCS by a factor of 100 (20 dB). According to this June 2002 article, the Russian plasma stealth device has been tested aboard a Sukhoi Su-27 IB fighter-bomber.
At the corner speed, the fighter can attain its maximum turn-rate, flying the craft just at the edge of buffeting (the turbulence preceding a stall). Below this speed, the aircraft will be limited to flying at lower g's, resulting in a decrease in turn rate. If the pilot attempts to "pull" more g's, the aircraft will buffet and aerodynamically ...
It is the Army component of the larger Defense Intelligence Information Enterprise (DI2E) and interoperable with other Service DCGS programs. Under the DI2E framework, USD (I) hopes to provide COCOM Joint Intelligence Operations Centers (JIOCs) capabilities interoperable with DCGS-A through a Cloud/widget approach. [ 31 ]
Contemporary radar systems can distinguish chaff from legitimate targets by measuring the Doppler effect; [4] chaff quickly loses speed after leaving an aircraft, and the resulting shift in wavelength of the radar return can be measured. To counter this, a chaff cloud can be illuminated by the defending vehicle with a doppler-corrected ...
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The tracked design and 800hp engine allows for a road speed of up to 55 km/h. The turret is made of welded steel armor that protects the crew from small arms fire and shell splinters. Over the frontal arc the armor is rated to withstand 14.5mm heavy machine gun round. The main armaments are PG-99 (Type 90) [3] twin-barrel anti-aircraft guns. [4]
The RIM-7 Sea Sparrow is a U.S. ship-borne short-range anti-aircraft and anti-missile weapon system, primarily intended for defense against anti-ship missiles.The system was developed in the early 1960s from the AIM-7 Sparrow air-to-air missile as a lightweight "point-defense" weapon that could be retrofitted to existing ships as quickly as possible, often in place of existing gun-based anti ...
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