• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.45 no.6
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• pp.473-480
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• 2017

Military helicopters are equipped with OBIGGS System to prevent an explosion caused by the projectile. OBIGGS warning lights up should only operate when sensing fault, but it frequently worked without malfunction in the initial production process and the design improvements were required. In this paper, the cause of OBIGGS abnormal warning lights up was reviewed, the improvements were established and proven.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.1
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• pp.76-81
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• 2014

Military helicopter is exposed to the enemy gun firing due to the low altitude flight of contour flight, hovering & nap of the Earth flight, therefore it has the high possibility to be exploded by the gun firing. Recently the Anti-ballistic requirement is required to get the high level of safety from gun firing in required operational capability. The first military utility helicopter of SURION has the Anti-ballistic requirement and explosion proof. In order to meet the requirement, OBIGGS is adopted for the first time in KUH. It is proven that Anti-Explosion capability is satisfied to requirement for improving vent system which was insufficiently designed in development period and related to Anti-explosion.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.7
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• pp.662-669
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• 2017

Military rotary aircraft are heavily exposed to projectile environments due to their mission characteristics, and fires caused by fuel leaks after shooting are linked directly to the loss of human life. To improve the survivability of pilots and crews, the fuel tank in rotary aircraft must have gunfire resistance and anti-explosion characteristics. Gunfire resistance can be satisfied by applying a self-sealing cell to a fuel tank. Anti-explosion can be satisfied by reducing the oxygen concentration in an explosive area and suppressing the generation of combustible fuel vapor by minimizing the evaporation rate of the fuel by heat. A Korean utility helicopter applies anon-board inert gas generation system to meet the anti-explosion requirements for ballistic impact. The generator fills the fuel tank with an inert gas and reduces the oxygen concentration. This paper describes the overall development process of the OBIGGS developed in accordance with the localization process of weapon components. OBIGGS was developed/manufactured through domestic technology, and the performance was found to be equal to or better than that of the existing products through single performance tests and aircraft mounting tests.