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4 février 2015 3 04 /02 /février /2015 12:20
Air Weapons: The V-22 Gunship

 

January 17, 2015: Strategy Page

 

U.S. SOCOM (Special Operations Command) is arming its V-22 tilt-rotor transports with more weapons, all of them forward firing and, along with temporary armor panels, meant to temporarily turn a V-22 into a gunship as needed. Tests are being performed to see if the V-22 can carry and launch guided missiles. SOCOM has already obtained a GAU-2B machine-gun fitted to the bottom of a V-22 as part of the Universal Turret System (UTS) for Helicopters. Plans for arming the V-22 have always been an option and since 2007 the marines and SOCOM have been developing weapons for use on their V-22s. The main purpose for this is to give V-22s just enough firepower to clear the landing zone long enough to land, unload and get away.

 

The original proposal was for a UTS equipped with a 12.7mm machine-gun, which has a longer range (about 2,000 meters). However, the 7.62mm GAU-17 can lay down more bullets more quickly and usually does so at low speed (1,500 rounds a minute). Experience in Iraq and Afghanistan indicated this would be a more useful defensive measure. Like the similar turret the Marine Corps developed, the SOCOM one is mounted on CV-22s as needed. The armed SOCOM CV-22 provides an option that the other V-22 users can easily adopt. The machine-gun turret was mainly there for protection from local threats, not for turning the V-22 into an assault aircraft. That attitude has now changed.

 

All this began back in 2011 when the U.S. Marine Corps ordered a dozen DWS (Interim Defensive Weapons System) turret gun kits for its hundred MV-22 tilt-rotor transports. Each kit cost about a million dollars. MV-22 crews were trained to use these new weapons which are quickly installed underneath the V-22. The remote control turret used a three-barrel 7.62mm GAU-17 machine-gun. This system has a rate of fire of up to 1,500-3,000 rounds per minute (25-50 per second) and max range of 1,500 meters. The system weighs under 100 kg (220 pounds) and includes 4,000 rounds of ammo. A member of the crew uses a video game like interface to operate the gun. Before the DWS arrived there was some experimentation mounting a heavy machine-gun on the rear ramp. But this did not prove nearly as effective as the turret.

 

The DSW is only mounted on a V-22 if a mission might be in need of some firepower. The DWS can swivel completely (360 degrees) around (useful when mounted underneath). It was apparently this weapon that was carried by an MV-22 sent to pick up the pilot and weapons operator who had to bail out of a disabled F-15E in Libya in 2011. The DWS was tested in Afghanistan in 2010 and by 2012 production models were being delivered. All MV-22 squadrons were given the opportunity to mount a turret on some of their aircraft and try out the weapon using live ammo.

 

The V-22s often have to fly into hostile territory to land their cargo. The V-22 can carry 24 troops 700 kilometers (vertical take-off on a ship, level flight, landing, and return) at 400 kilometers an hour and sometimes has to land in areas where the locals are firing at them. The marine MV-22 is replacing the CH-46E helicopter, which can carry 12 troops 350 kilometers at a speed of 200 kilometers an hour. The MV-22 can carry a 10,000-pound external sling load 135 kilometers, while the CH-46E can carry 3,000 pounds only 90 kilometers.

 

The U.S. Air Force component of SOCOM uses the CV-22 to replace the current MH-53J special operations helicopters. Unlike the U.S. Marine Corps version, the SOCOM CV-22B has a lot more expensive electronics on board. This will help the CV-22 when traveling into hostile territory, especially at night or in bad weather. The CV-22 carries a terrain avoidance radar, an additional 3,600 liters (900 gallons) of fuel, and more gadgets in general. The 25 ton CV-22 is a major improvement on the MH-53J, with three times the range, and a higher cruising speed (at 410 kilometers an hour, twice that of the helicopter). The CV-22 can travel about a thousand kilometers, in any weather, and land or pick up 18 fully equipped commandoes. The SOCOM CV-22s have been in action since 2008 but SOCOM will never have more than fifty of them.

 

The V-22 is the first application of the tilt-rotor technology in active service. The air force is already working on improvements (to make the V-22 more reliable and easier to maintain). The MV-22 gives the marines and SOCOM a lot more capability but, as it often the case, this is a lot more expensive. The initial production models of the CV-22 cost over $60 million each. SOCOM insists on a high degree of reliability for its aircraft. Commando operations cannot tolerate too many mistakes without getting fatally derailed.

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