In modern warfare, the fight for air superiority is of paramount importance, and the front-line airport is the top priority of the enemy. The conventional practice is to use anti-runway bombs/missiles, ground-bombs, and ballistic missiles to destroy the airport runway, so that it can not take off and land the aircraft, and win the opportunity to seize the air superiority. Generally, the runway is bombed out of the big pit. The emergency repair method is to quickly lay a layer of steel plate (or glass steel plate) on it to realize emergency maintenance of the airport runway and ensure that the fighter can take off and land normally. The steel plate has a high weight and a large area, and it is inconvenient to lay and use. To this end, a domestic private enterprise - Ningbo Dacheng Advanced Materials Co., Ltd. has developed a new panel equipment using lightweight composite materials, which can perfectly replace the steel plate to solve the problem of airport runway bombing.

Composite panel features

First, the domestic composite panel equipment is light and sturdy, and its mechanical properties exceed that of traditional steel plates. The new lightweight composite panel is made of high-performance ultra-high molecular polyethylene fiber material (which is also the main material of the current active body armor), carbon fiber material and glass fiber material, which are combined according to reasonable scientific components and structure. A new lightweight composite material based on resin. Its biggest feature is light weight. According to field technicians, it is at least twice as light as the FRP panel of one of the traditional battlefield emergency laying materials, which is much lighter than traditional steel plates. Followed by a strong and solid, domestic composite panel, tensile strength of 196.02 MPa, bending strength of 283 MPa, impact toughness of 247.73 kJ / m2, Barcol hardness also reached 44. These parameters are superior to the existing glass steel plate materials (tensile strength of 120 MPa or more, bending strength of 200 MPa or more, impact toughness of 200 MPa or more, and Brinell hardness of 40 or more). The emergency runway paved with composite panels, the tough anti-fighter landing gear wheel impact, while being strong and not afraid of deformation, is absolutely no problem to use.

Secondly, it is easy to use. The domestic composite emergency repair panel has a thickness of 8 mm, a width of 9 meters, and a board length of 1.8 meters. The entire set of panels is composed of a plurality of 1.8-meter-long panel splicings. The shape is like a screen, which can be folded and Expanded, a set of panels typically consists of 9.5 panel panels with an area of approximately 155 square meters. When not in use, it can be folded up. The outline of 9×1.8 meters is small, it is easy to store in the warehouse, and it is easy to carry (use a small forklift and other tools to transport it flexibly). In the event of a war, it is light and small in size and can be deployed very quickly. According to the introduction, only about 10 sets of foldable panels can be used to lay the complete runway required for a fighter to take off and land.

Thirdly, the performance of the composite panel details is also outstanding. In the war, the weather is changeable, and sometimes it is likely to rain. As long as the water falls on the general emergency repair panel, a water film will be formed. This water film will seriously reduce the friction of the panel. For the fighter. This will seriously affect the friction between the fighter wheel and the panel, thus affecting the smooth running and landing of the fighter, and even cause serious take-off and landing accidents. According to the national military standard, the reasonable coefficient of friction of the captain's emergency repair panel under the condition of water film formation under rainfall conditions should be reasonable between 0.45 and 0.6. The coefficient of friction under the water film condition of the domestic new composite panel is 0.58, which fully meets the requirements of the national military standard.

Conclusion

According to reports, this lightweight composite material wartime airport emergency repair panel equipment, there is no similar products in China. If it can be applied in the future, it will certainly have a good effect on improving the air force's emergency response capability for wartime airports.

From Ordnance Industry Science Technology Journal  （Wechat ID：binggongkeji）