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Arjun

The first prototype of the Arjun main battle tank was built in 1984. It was first publicly revealed in 1985. This main battle tank was intended to replace the ageing Vijayanta and Soviet T-72M MBTs in service with the Indian Army. Development process was plagued with delays and to date only 12 prototypes and 32 pre-production vehicles have been built. In 2008 it was announced that there will be no further orders for Arjun tanks. Furthermore India acquired significant number of T-90 MBTs from Russia and plans to manufacture this main battle tank locally. It was reported that a new Arjun Mk.2 MBT is under development.

The Arjun MBT has some design similarities with German Leopard 2. It utilizes Kanchan heavy composite armor, which is broadly similar to British Chobham armor. If necessary explosive reactive armor blocks can be added for improved protection. Arjun MBT also incorporates significant crew protection measures, including ammunition compartment separated from the crew with a blow-off panels in the turret bustle.

Vehicle is armed with a 120-mm rifled gun. It is worth mentioning that a rifled gun of such caliber is used only on Challenger 2 MBT. This gun is very accurate at long range and ensures high hit probability. Gun is loaded manually and has a rate of fire of 6 rounds per minute. It is compatible ... კითხვის გაგრძელება »

Collins class

Needing a successor to its obsolescent Oberon class diesel-electric submarines, the Royal Australian Navy decided in the first part of the 1980s to consider the full range of foreign-designed submarines that would meet the RAN's operational requirement and also be suitable for construction in an Australian yard. The decision eventually went to a Swedish design, the Type 471 designed by Kockums, and in June 1987 the Australian Submarine Corporation contracted with Kockums for six such submarines, to be built in Adelaide, South Australia, and known in Australian service as the Collins class. The contract included an option for another two boats, but this option was not exercised.

Fabrication of the boats initial assemblies began in June 1989, and the bows and midships sections of the first submarines were produced in Sweden and shipped to Adelaide to be mated with locally built sections. The boats were laid down between February 1990 and May 1995, launched between August 1993 and November 2001, and completed between July 1996 and a time in 2003, and are named HMAS Collins, HMAS Farncomb, HMAS Waller, HMAS Dechaineux, HMAS Sheean and HMAS Rankin.

The armament and fire control/combat system, the latter proving very troublesome during development and initial service, are along American lines, while the sonar is basically of F ... კითხვის გაგრძელება »

Nimitz class

The first three Nimitz class carriers were originally designed as replacements for the elderly Midway class. The largest and most powerful warships ever built, they differ from the earlier nuclear-powered USS Enterprise in having two reactors rather than eight, with ordnance magazines between and forward of them. This increases the internal space available to allow some 2 570 tons of aviation weapons and 10.6 million litres (2.8 million US gal) of aircraft fuel to be carried. These totals are sufficient for 16 days of continuous flight operations before stocks have to be replenished. The class is also fitted with the same torpedo protection arrangement as carried by the USS John F. Kennedy, and is laid out with the same general arrangement and electronic fit as the JFK.

Four deck-edge aircraft elevators are available: two forward and one aft of the island on the starboard side and one aft on the port side. The hangar is 7.80 m (25 ft 7 in) high, and like those of other US carriers can accommodate, at most, only half of the aircraft embarked at any one time; the remainder is spotted on the flight deck in aircraft parks. The flight deck measures 333 x 77 m (1 093 x 253 ft), the angled section being 237.70 m (780 ft) long. It is fitted with four arrester wires and an arrester net for recovering aircraft. Four steam catapults a ... კითხვის გაგრძელება »

Boeing/Sikorsky RAH-66 Comanche

he US Army's ambitious LHX (Light Helicopter Experimental) programme called for a new armed reconnaissance/scout helicopter to replace the service's force of 3 000 AH-1s, OH-6s and OH-58s. A request for proposals was issued in June 1988, and 23-month demonstration and validation contracts were placed with two industrial teamings: the 'Super Team' (Bell and McDonnell Douglas) and the 'First Team' (Boeing and Sikorsky). In April 1991 the designation and name RAH-66 Comanche were selected and the First Team was announced as winner. The Comanche is designed for minimum observability and is based on a stealthy airframe built largely of composite materials. Its advanced avionics are designed for maximum commonality with the F-22 Raptor, and include dual triplex fly-by-wire control systems with sidestick cyclic pitch controllers, a 'glass' cockpit with two large liquid-crystal displays in each cockpit, advanced crew helmet displays and sights, a comprehensive self-protection suite, and provision for Longbow radar.

Development of the RAH-66 Comanche has been slowed by technical considerations as well as political antipathy and budgetary delays. The definitive programme emerged in 1995, and called for two YRAH-66 flying prototypes (the first flying on 4 January 1996) plus six 'early operational capability' helicopters with reconnaissance equipmen ... კითხვის გაგრძელება »

PZL Swidnik W-3 Sokol

In 1979, with nearly 20 years experience of building Mil-designed helicopters behind it, Poland's PZL Swidnik flew the first prototype of a new design designated W-3 and named Sokol (Flacon). There was a long series of tethered tests and extensive design changes before the second prototype flew in May 1982, and it was another three years before production began. Since then, PZL has developed several specialized variants for military and civil applications.

By 1996 PZL had completed more than 80 production W-3s, including 12 for Myanmar. Others were built for the Polish armed forces and government agencies, and included naval, fire-fighting and search and rescue (SAR) models.

Known as the Anakonda, the W-3RM is a rescue variant with flotation bags, a watertight cabin and a winch. The W-3U-1 Alligator was proposed for the anti-submarine role, but the planned W-3 Sokol-Long, with a stretch fuselage seating up to 14 fully armed troops, was discontinued in 1993.

W-3s have been fitted with several different weapons, including AT-6 Spiral anti-tank and SA-7 Grail anti-aircraft missiles, 20-mm and 23-mm cannon, and rocket launchers. At one stage, the manufacturer teamed with Kentron of South Africa to offer an export version with weapons systems similar to those of the Denel AH-2 Rooivalk, but the partnership failed in 1994.

In its ba ... კითხვის გაგრძელება »

Westland Lynx

The Lynx is arguably the most capable and versatile helicopter in its class. Launched as part of the Anglo-French helicopter agreement of 1967, the Lynx design is wholly of Westland origin, but production of the type is shared in the ratio of 70:30 between GKN Westland in the UK and Eurocopter France.

All versions of the Lynx have advanced digital flight controls plus all-weather avionics. The four-bladed semi-rigid main rotor confers a level of agility matched by no other helicopter of its generation. The first Lynx prototype flew in 1971 and production has been predominantly for use by UK armed forces. The type entered service in 1977 as the Lynx AH.Mk 1 battlefield helicopter for the British Army and Royal Marines. Some 103 examples were upgraded to the Lynx AH.Mk 7 standard and these remain the Army Air Corps primary anti-armor type, equipping 11 operational squadrons.

The upgraded Lynx AH.Mk 9 includes a nosewheel undercarriage and advanced British experimental rotor programme main rotor blades. Procurement comprises eight converted AH.Mk 7s and 16 new-builds.

The other major operator is the Royal Navy; the Lynx is its primary ship based helicopter and fulfils anti-submarine and anti-ship warfare, search and rescue, over the horizon targeting for nuclear attack submarines and communications duties.

From 1994 the R ... კითხვის გაგრძელება »

Boeing Helicopters CH-47 Chinook

Though the US Army was initially interested in the Vertol 107 (which became the H-46 Sea Knight), in 1959 it finally picked a much bigger project, under development since 1956. The prototype Boeing Vertol Model 114 Chinook flew on 21 September 1961, and since then over 1 160 have been built, including 136 from Agusta (Meridionali) in Italy and 54 by Kawasaki in Japan (CH-47J).

The original CH-47A reached the US Army in December 1962, and Vertol built 349 before delivering 108 CH-47Bs with more powerful engines, followed by 233 CH-47Cs with 3 750-shp (2798-ekW) engines, increased fuel and, as a retrofit, glass fibre blades and blade-inspection systems.

Boeing and Meridionali have sold Chinooks all over the world, export models including the Canadian CH-147 and RAF Chinook HC.Mk 1. The HC.Mk 1 was delivered with two cargo hooks, one rated at 9 000 kg and the other at 11 300 kg, and comprehensive nav/com avionics.

Between 1982 and 1998 over 480 of the US Army's Chinooks were remanufactured to CH-47D standard with greatly enhanced capability; the RAF has also upgraded 32 of its surviving Chinooks to this standard as Chinook HC.Mk 2s and also received a further eight new-build HC.Mk 2s, as well as nine HC.Mk 3s, which are similar to the US Army's MH-47E special missions helicopter. Other nations operatin ... კითხვის გაგრძელება »

Lockheed F-117 Nighthawk

From experience with two XST technology demonstrators, Lockheed's Skunk Works developed the world's first operational tactical warplane to use low observable, or stealth, technology to reduce vulnerability to radar detection.

Developed in great secrecy, the first of five FSD prototypes flew in 1981, and in 1983 the first USAF unit was declared operational. The F-117A was officially acknowledged by the Pentagon in 1988, and in 1989 the type finally went into action during the US invasion of Panama.

The F-117 made a significant contribution to Operation Desert Storm; 42 aircraft flew from Saudi Arabia on nightly missions against high priority targets in Iraq and occupied Kuwait. The F-117A struck Serbian targets during Operation Allied Force in 1999 and suffered its first operational loss.

In USAF planning the F-117 is used for attacks against highly leveraged targets such as C³l centers, air defense sector centers, key bridges and airfields. The F-117A uses a highly accurate internal navigation system to put it in the right position to begin the attack. A forward-looking infra-red and downward-looking infra-red are used to acquire the target. Precision guided munitions are guided to a direct hit on the target by a laser boresighted with the downward-looking infra-red.

After the Gulf War, the F-117 c ... კითხვის გაგრძელება »

Tupolev Tu-22M Backfire

The Tu-22M was developed from the earlier Tu-22 design, incorporating variable-geometry outer wing panels. The first Tu-22M-0 prototype flew in 1969. Powered by a military derivative of the engine originally designed for the Tu-144 supersonic airliner, the Backfire is extremely fast, even at low level. The Tu-22M lacks sufficient range for truly strategic missions and is classified as a medium bomber.

The first series production model was the Tu-22M-2 Backfire-B (211 built) for the Soviet Air Forces and the Naval Aviation Forces. Normally armed with a single Kh-22 stand-off missile, this variant became operational with 185 Guard Heavy Bomber Aviation Regiment at Poltava in 1978, and also served in Afghanistan.

The ultimate bomber/missile carrying variant is the Tu-22M-3 Backfire-C, (268 built). The M-3 features strengthened wings, raked rectangular intakes serving more powerful engines. It also had a greatly increased weapons load (see specification). The Tu-22M3 remains numerically the most important bomber in the Russian air force's Long-Range Air Army inventory, and serves with seven regiments (one of which also operates Tu-22M-2s). The Naval Aviation Forces have about 80 Tu-22Ms, mostly M-3 models, split equally between divisions subordinated to the Northern and Pacific Fleets. The Naval Aviation Forces also have 12 M-3s conver ... კითხვის გაგრძელება »

Saab 37 Viggen

Designed to meet exacting Swedish requirements, the innovative Saab 37 Viggen (thunderbolt) multi-role fighter was for many years the backbone of Sweden's air defence, and today five of the Flygvapnet's front-line Flottiljer continue to fly the type. The first Viggen prototype made its maiden flight in 1967, and the initial production AJ 37 attack fighter (108 built) flew in 1971. The other major variants comprised 27 SF 37s for all-weather overland reconnaissance, 28 SH 37s for maritime reconnaissance and 17 Sk 37 operational conversion trainers.

Between 1979 and 1990 the Flygvapnet received 149 second-generation JA 37s for the interceptioin role. During 1993-1997 Saab converted 48 AJ 37, 25 SF 37 and 25 SH 37s to AJS 37 standard to provide integrated attack, fighter and reconnaissance capabilities. Funding problems restricted the upgrade and a common standard was not achieved. Despite this programme, the attack/recce Viggens were rapidly replaced by JAS 39 Gripens and only one wing (F21) operated these AJS 37s in 2001.

Meanwhile the JA 37 has been kept continually up-to-date, with the most recent programme referred to as the Mod D standard. This adds an updated PS46A radar and a new weapons interface and stores management computer that enables the use of AIM-120 AMRAAMs. The first upgraded JA 37 was re-delivered in 1998. The JA 37 ... კითხვის გაგრძელება »

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