From 6 weeks of accidents, the U.S. -stop flying aircraft transport aircraft. Why are the accidents frequently in service for many years?

Cracked "Merlog" transport aircraft

Recently, a news has aroused the attention and aroused extensive discussions. According to foreign media, on August 17, the U.S. military announced that it has stopped all the CV-22 "fish eagle" transport aircraft. The reason is due to the frequent accidents of the accident. In the past few years, CV-22 "Merlon" transport aircraft have occurred as many as four accidents caused by their own mechanical failures. At the same time, two accidents occurred in the past 6 weeks of the CV-22 "Merlon" transport aircraft, but fortunately did not cause casualties. But for the sake of safety, the U.S. military decided to temporarily stop all CV-22. You must know that it is just a modification in the huge "fish eagle" family, and the CV-22 has caused so many accidents, so why is it still frequent accidents for many years?

"Merlon" transport aircraft

Before answering this question, we must first understand the relevant information of the "Merlon" transport aircraft. The V-22 "Merlog" rotor rotor is a tilt rotor machine jointly designed and manufactured by Bell and Boeing. At the same time, the aircraft has both the advantages of fixed wing propeller plane aircraft, long range, low fuel consumption, and the vertical rise and fall capacity of helicopters. V-22 is designed by Bell's XV-3 and XV-15 as a blueprint. The development of development began in the 1980s, and began to serve in the US Marine Corps in 2007 to replace CH-46 Sea Knight helicopters. Since 2009, the U.S. Air Force has also begun to be derived by the Air Force. V-22 has been deployed by the US Marine Corps and the US Air Force in Iraq, Afghanistan, Sudan and Libya to engage in combat and rescue missions. However, since the date of mass production, there have been dozens of accidents. It is another "troublemaker" after the "widow maker" F-104 fighter. But why is such a advanced and for many years of service now falling into such a situation? Please look down.

"Merlon" landed on the surface ship.

I think there are three main reasons for the frequent causes of the "Merlog" series of transport aircraft.

The first point, this transport aircraft itself has a series of design defects. First of all, the T406 engine equipped with "Merlon" provides a strong power while it is inevitable. During the take -off and landing process, under the drive of the airflow, the dust debris on the ground will enter the engine compartment, causing the failure to cause a crash. Secondly, one of the most important reasons for the reason why the take -off and landing session will become the most important scene of the "Merlon" accident is because of its unique take -off and landing method, which is different from other conventional vertical take -off and landing models. The unique structure determines that in the process of taking off and landing, it will easily fall into the "vortex" due to the switching of the flight mode. Once it is caught, there will be a great probability that it will cause the tragedy of the opportunity to destroy people.

Secondly, the precise and complex structure leads to a high failure rate. In order to reduce the space required when being loaded, the entire main wing can rotate 90 ° to become parallel to the fuselage, and the three -leaf rotor can also be overlapped in one place. In this way, we can see that the complexity and precision of its design are evident, but because the rotation and folding design is very complicated, the failure rate is very high. At the same time, the body has more than 43%of the components. Compared with the materials used by general models, the difficulty of maintaining and maintenance of the new material is much higher than that of ordinary materials. In summary, the high -area application of high repairs caused by complex structures and the large -scale application of new materials tests the skill level and experience of the maintenance personnel of the crew. Due to the inadequate maintenance, accidents that caused the plane during use and the crash also occurred from time to time.

The third point, because the "Merlon" transport aircraft have multiple different models, in the U.S. Air Force, the Army, the Navy, the Marine Corps and other troops all deployed. Diverse. And most of its deployment is to replace the original traditional helicopter. For example, before. The products under the combination of aircraft and rotating wing aircraft are very different from the operation of the operation before the installation. Then, the problem has arisen. When the driver who is accustomed to driving traditional helicopters faces emergencies in a complex combat environment, due to the lack of understanding of the characteristics of the aircraft, at the same time, the wrong judgment and operation are made. It is also very possible.

Through this grounding incident and analysis, we learned that "Merlogs" always frequently occurred in several main reasons. Although many problems and defects were exposed, it is undeniable that "fish eagle" still has still available Its excellent side, advanced and advanced design concepts well blends all kinds of advantages of associated aircraft, and at the same time provide us with more ideas, providing valuable experience for the development of rotor -class aircraft in the future.

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