U.S. Military Weapons Systems, Part II
In this part, we’ll be looking at various aircraft used by the U.S. armed forces, including fighters and attack aircraft. Much of what is written here is
not my work, but is quoted from the various web sites I used and linked to. Here and there I edited some of the text to clear up grammatic errors or correct some awkward phrasing.
Fighters
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F-15 Eagle
The F-15 is a twin engined, all-weather air superiority tactical fighter. With a mixture of superior maneuverability, range, speed, weapons, and avionics, the F-15 is the premier fighter of the U.S. Air Force. It achieves its aerial superiority through a combination of a high thrust-to-weight ratio and low wing loading. The high thrust-to-weight ratio allows the F-15 to 'go ballistic', i.e. to climb straight up using nothing but the thrust of its engines. The low wing loading (the ratio between aircraft weight to its wing area) gives the F-15 its high maneuverability.
The F-15 can carry a variety of air-to-air missiles for engaging enemy aircraft, including the AIM-9 Sidewinder, AIM-7 Sparrow, or AIM-120 AMRAAM. The F-15 also has an internally mounted 20 mm Gatling gun with 940 rounds of ammo located in the right wing root.
The F-15 also mounts a number of Electronic Counter Measures (ECM) systems designed to help protect the F-15 from enemy weapons systems. “The F-15's electronic warfare system provides both threat warning and automatic countermeasures against selected threats. The "identification friend or foe" system informs the pilot if an aircraft seen visually or on radar is friendly. It also informs U.S. or allied ground stations and other suitably equipped aircraft that the F-15 is a friendly aircraft.”
The Fiber Optic Towed Decoy (FOTD) provides aircraft protection against modern radar-guided missiles to supplement traditional radar jamming equipment. The device is towed at varying distances behind the aircraft while transmitting a signal like that of a threat radar. The missile will detect and lock onto the decoy rather than on the aircraft. This is achieved by making the decoy’s radiated signal stronger than that of the aircraft.
Ground attack capability was added in the form of the F-15 Strike Eagle. A second seat was added for a Weapons Systems Operator (WSO), or 'wizzo' in Air Force parlance. The F-15E is configured to carry Mark 82 iron bombs, Mk 20 'Rockeye' dispensers, as well as other cluster munitions dispensers. It can also carry 'smart weapons', including the CBU-10 laser guided bomb as well as the AGM-65
Maverick air-to-ground missile. The F-15E incorporates a
LANTIRN pod, used to improve night delivery of precision guided weapons.
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F-16 Falcon
The F-16 Fighting Falcon is a compact, single engine, multi-role fighter aircraft. It is highly maneuverable and has proven itself in air-to-air combat and air-to-surface attack. It provides a relatively low-cost, high-performance weapon system for the United States Air Force and allied nations.
In an air combat role, the F-16's maneuverability and combat radius (distance it can fly to enter air combat, stay, fight and return) exceed that of all potential threat fighter aircraft. It can locate targets in all weather conditions and detect low flying aircraft in radar ground clutter. In an air-to-surface role, the F-16 can fly more than 500 miles (860 kilometers), deliver its weapons with superior accuracy, defend itself against enemy aircraft, and return to its starting point. An all-weather capability allows it to accurately deliver ordnance during non-visual bombing conditions.
In designing the F-16, advanced aerospace science and reliably proven systems from other aircraft such as the F-15 and F-111 were selected. These were combined to simplify the airplane and reduce its size, purchase price, maintenance costs and weight. The light weight of the fuselage is achieved without reducing its strength. With a full load of internal fuel, the F-16 can withstand up to nine G's -- nine times the force of gravity -- which exceeds the capability of other current fighter aircraft.
The cockpit and its bubble canopy give the pilot unobstructed forward and upward vision, and greatly improved vision over the side and to the rear. The seat-back angle was expanded from the usual 13 degrees to 30 degrees, increasing pilot comfort and gravity force tolerance. The pilot has excellent flight control of the F-16 through its "fly-by-wire" system. Electrical wires relay commands, replacing the usual cables and linkage controls. For easy and accurate control of the aircraft during high G-force combat maneuvers, a side stick controller is used instead of the conventional center-mounted stick. Hand pressure on the side stick controller sends electrical signals to actuators of flight control surfaces such as ailerons and rudder.
The F-16 carries a number of air-to-air missiles in its role as a tactical fighter. These include the AIM-9
Sidewinder, AIM-7
Sparrow, and the AIM-120
AMRAAM. The F-16 also carries an internally mounted 20mm Gatling with 500 rounds of ammo. It is located in the left wing root.
In its ground attack role, the F-16 can carry a wide array of weapons. These include Mk82 and Mk 94 'dumb' iron bombs, cluster munitions dispensers, precision guided bombs (smart bombs), as well as air-to-ground missiles like the AGM-65 Maverick. The Wild Weasel version of the F-16 also carries the AGM-88
HARM, used to destroy enemy air defense radar systems.
The F-16 also carries LANTIRN when configured for ground attack.
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F-14 Tomcat
The U.S. Navy’s F-14 Tomcat is a supersonic, twin-engine, variable sweep wing, two-place fighter designed to attack and destroy enemy aircraft at night and in all weather conditions. The F-14 can track up to 24 targets simultaneously with its advanced weapons control system and attack six with Phoenix AIM-54A missiles while continuing to scan the airspace. Armament also includes a mix of other air intercept missiles, rockets and bombs.
The Tomcat is a 2-seat, twin-engine fighter with twin tails and variable-geometry wings. Its general arrangement consists of a long nacelle containing the large nose radar and 2 crew positions extending well forward and above the widely spaced engines. The engines are parallel to a central structure that flattens towards the tail; butterfly-shaped airbrakes are located between the fins on the upper and lower surfaces. Altogether, the fuselage forms more than half of the total aerodynamic lifting surface.
The wings are shoulder-mounted and are programmed for automatic sweep during flight, with a manual override provided. The twin, swept fin-and-rudder vertical surfaces are mounted on the engine housings and canted outward. The wing pivot carry- through structure crosses the central structure; the carry through is 22 ft (6.7 m) long and constructed from 33 electron welded parts machined from titanium; the pivots are located outboard of the engines. Normal sweep range is 20 to 68 deg with a 75-deg "oversweep" position provided for shipboard hangar stowage; sweep speed is 7.5 deg per second.
The F-14 weapons complement includes the
AIM-54 Phoenix, AIM-9 Sidewinder, AIM-7 Sparrow and an internally mounted 20 mm Gatling gun for air defense fitted on the left side of the fuselage. The F-14 can also carry the AGM-88 HARM and
AGM-84 Harpoon anti-ship/land attack missile for anti-shipping and ground attack missions.
In ground attack configuration the F-14 is also capable of using ‘dumb’ iron bombs or precision guided weapons, such as laser guided bombs.
The F-14 is slated to be removed from service by 2008.
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F/A-18 Hornet
The F/A-18 "Hornet" is a single- and two-seat, twin engine, multi-mission fighter/attack aircraft that can operate from either aircraft carriers or land bases. The F/A-18 fills a variety of roles: air superiority, fighter escort, suppression of enemy air defenses, reconnaissance, forward air control, close and deep air support, and day and night strike missions. The F/A-18 Hornet replaced the F-4 Phantom II fighter and A-7 Corsair II light attack jet, and also replaced the A-6 Intruder as these aircraft were retired during the 1990s. The F/A18 is flown by both the U.S. Navy and Marines.
The F/A-18 has a digital control-by-wire flight control system, which provides excellent handling qualities and allows pilots to learn to fly the airplane with relative ease. At the same time, this system provides exceptional maneuverability and allows the pilot to concentrate on operating the weapons system. A solid thrust-to-weight ratio and superior turn characteristics combined with energy sustainability enable the F/A-18 to hold its own against any adversary. The power to maintain evasive action is what many pilots consider the Hornet's finest trait. In addition, the F/A-18 was also the Navy's first tactical jet aircraft to incorporate a digital, MUX bus architecture for the entire system's avionics suite. The benefit of this design feature is that the F/A-18 has been relatively easy to upgrade on a regular, affordable basis.
The F/A-18 has proven to be an ideal component of the carrier based tactical aviation equation over its 15 years of operational experience. The only F/A-18 characteristic found to be marginally adequate by battle group commanders, outside experts, and even the men who fly the Hornet, is its range when flown on certain strike mission profiles. However, the inadequacy is managed well with organic and joint tanking assets.
The F/A-18’s weapon complement for air defense include the AIM-9 Sidewinder, AIM-7 Sparrow, AIM-120 AMRAAM, and an internally mounted 20 mm Gatling gun with 520 rounds of ammo fitted in the nose. The ground attack weapon complement includes the AGM-65 Maverick, AGM-84 Harpoon, AGM-88 HARM, various precision guided munitions including
JDAM, and nuclear ordinance such as the B-57 or B-61 gravity bombs.
Ground Attack
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A-10 Thunderbolt II (Warthog)
The A-10 and OA-10 Thunderbolt IIs are the first Air Force aircraft specially designed for close air support of ground forces. They are simple, effective and survivable twin-engine jet aircraft that can be used against all ground targets, including tanks and other armored vehicles. Because of its ungainly appearance, it is known affectionately as the Warthog.
The primary mission of the A-10 is to provide day and night close air combat support for friendly land forces and to act as forward air controller (FAC) to coordinate and direct friendly air forces in support of land forces. The A-10 has a secondary mission of supporting search and rescue and Special Forces operations. It also possesses a limited capability to perform certain types of interdiction. All of these missions may take place in a high or low threat environment.
The A/OA-10 aircraft was specifically developed as a close air support aircraft with reliability and maintainability as major design considerations. The Air Force requirements documents emphasized payload, low altitude flying capability, range and loiter capability, low speed maneuverability and weapons delivery accuracy. The aircraft is capable of worldwide deployment and operation from austere bases with minimal support equipment.
Specific survivability features include titanium armor plated cockpit, redundant flight control system separated by fuel tanks, manual reversion mode for flight controls, foam filled fuel tanks, ballistic foam void fillers, and a redundant primary structure providing “get home” capability after being hit. Design simplicity, ease of access and left to right interchangeable components make the A/OA-10 aircraft readily maintainable and suitable for deployment at advanced bases.
The A-10/OA-10 has excellent maneuverability at low air speeds and altitude, and is a highly accurate weapons-delivery platform. They can loiter near battle areas for extended periods of time and operate under 1,000-foot ceilings (303.3 meters) with 1.5-mile (2.4 kilometers) visibility. Their wide combat radius and short takeoff and landing capability permit operations in and out of locations near front lines. Using night vision goggles, A-10/ OA-10 pilots can conduct their missions during darkness.
The Warthog has an impressive weapons payload capability, with 11 external hardpoints to mount its weapons. These include Mk 82 and Mk84 iron bombs, MK77 incendiaries, Mk 20 Rockeye dispenser, various cluster munitions dispensers, GBU-10 and GBU-12 laser guided bombs, and AGM-65 Maverick missiles. The A-10 can also mount 2 AIM-9 Sidewinder missiles for self defense against air-to air threats.
But the most impressive weapon in the A-10’s arsenal is the
GAU-8/A 30 mm Gatling gun. Carrying 1000 rounds of armor piercing depleted uranium shells, the A-10 is an impressive tank killer. To all intents and purposes the Warthog was built around its cannon, giving the cannon an airborne platform to do its job.
Originally scheduled to be removed from Air Force service by 2005, its service life has been extended well in to 2028. Some feel that decision was made because of its exceptional performance during Desert Storm in 1991. During Desert Storm it had a mission capable rate of over 95 percent, flew 8,100 sorties, and launched 90 percent of the AGM-65 Maverick missiles used.
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Part III will look at bombers, support aircraft, and helicopters.
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“Don’t try to have the last word. You might get it.” – Lazarus Long