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Exeter
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Dervish
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01.02.2008 20:51:51
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Рубрики
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Флот; Артиллерия;
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Американцы давно уже ведут работы в этом направлении
И прикидки относительно размещения рейлганов на том же DD(X)/DDG-1000 у них есть, уважаемый Dervish. Вот из статейки по этой проблеме:
"A workshop held by the USN in November 2001 at the Institute for Advanced Technology (IAT) to examine the feasibility of a long-range naval railgun concluded that no current scientific or technological obstacles would preclude the development of a naval railgun. Supporting parametric studies and modelling activities produced the principal characteristics of a notional EM naval gun weapon system, able to fit in the shipboard space and weight footprint of the 155 mm AGS, firing a 20 kg launch package at a velocity of 2,500 m/s (Mach 7.5) and providing 63 MJ of muzzle energy. Its hypervelocity projectile would take just six minutes to reach its maximum range of 200 n miles, impacting at Mach 5 to achieve a kinetic kill. Studies estimated that a 200 MJ PFN would deliver the required muzzle velocity and energy.
With DD(X) eyed as the enabling platform for EM gun technology, what was United Defense (now BAE Systems Arm¡ament Systems Division) was in 2003 awarded a six-month study under Technical Instruction 13 to examine the feasibility of integrating a railgun aboard the new destroyer. Its conclusions "showed there would be sufficient power available to integrate two 63 MJ guns aboard an IPS ship with 81 MW power available, operate at 10-12 rds/min and maintain ship speed at 10-18 kt", says Amir Chaboki, BAE Systems' EM gun programme manager. "It also concluded that the weight and size est¡imates for the notional railguns are within practical limits. Thermal management was determined to be the most challenging engineering task in integration."
И еще:
"The amount of power required for a railgun depends on the rate of fire. With an expected 80 MW of installed electrical power, electric warships will have ample power to supply a railgun with the 15-30 MW necessary for sustained fires at 6-12 rds/min. It is also worth noting the railgun would eliminate the need for both gun powder and explosives from the magazine. This improves ship safety and lowers logistics costs." (Roger Ellis, Railgun Technical Director within ONR's Air Warfare and Weapons Department).
Состояние программы с его слов:
"We need to develop a launcher with a multi-shot barrel life, a barrel design constructed to retain the rail repulsive forces, resolve thermal management issues and scale up current state-of-the-art 8 MJ systems to 32 MJ and ultimately 64 MJ muzzle energy systems. As regards the projectile, we have work to do on gun-launch survivability [where projectiles may experience accelerations of 45,000 g and encounter potential electromagnetic interference effects], hypersonic guided flight and lethality mechanics." An Electromagnetic Launcher Facility (EMLF) at NSWCDD is the key tech¡nical facility supporting the INP programme. Outfitted with a 100 MJ capacitor bank (developed by General Atomics) and a refurbished 90 mm Single Shot Gun taken from the Green Farm facility, the EMLF began test and commissioning activities in October 2006. A first low-energy shot was fired on 2 October, with a 2.4 kg projectile fired at 830 m/s, yielding an energy of 0.8 MJ.
By early December 2006, the launcher had fired at energies in excess of 2 MJ. The EMLF was formally dedicated at NSWCDD during a ceremony hosted by the ONR on 16 January this year (a ceremonial ribbon was pierced by a projectile fired with a muzzle energy of 7.4 MJ to achieve a velocity of 2,146 m/s).
To support the INP, the stored energy, launcher and terminal area at NSWCDD will be increased in size to accommodate a 32 MJ muzzle energy gun by the end of Fiscal Year (FY) 2008. BAE Systems Armament Systems Division, in collaboration with IAP Research and SAIC, is working under a USD5.4 million contract to design and fabricate the uprated 32 MJ lab¡oratory launcher. According to BAE Systems' Amir Chaboki, this is scheduled for installation and commissioning at NSWCDD in mid-2007. He observes that this "will be a fixed, lab-based launcher, using laminated steel-plate containment, serving as a workhorse for bore life development.
A broad consortium, drawing on repre¡¡¡sen¡tation from government laboratories, industry and academia, is supporting those activities".
ONR's Phase 1 programme schedules demonstration of an initial 32 MJ test capability by the end of the third quarter of FY08. "Our critical go/no go decision point to proceed into Phase 2 occurs in August 2009," says Ellis. "Assuming we get the green light, we plan to run a 32 MJ launcher 100-shot bore life demonstration and a 32 MJ advanced containment demonstration by the end of FY10."
С уважением, Exeter