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The original Mirage 4000 fighter, both engines stopped at the same time, this was a serious accident, Omar piloted the unpowered fighter plane, successfully flew back to the airport, so he made a second-class merit. Pen & Fun & Pavilion www.biquge.info≦≧ (Full, all in May Day oh I. want

At the same time, the cause of the accident has also begun an intensive investigation, this accident, aroused the close attention of His Excellency Qusay, you know, this kind of fighter, but he has dominated the Middle East in recent years, he will definitely not tolerate this fighter has major defects, especially the engine!

In dealing with this issue, there was a clash between Iraqi personnel and the technical staff of the French company Dassault.

The French side firmly believed that there was no problem with its engine, and that the cause of the problem must have been caused by improper maintenance by the ground crew on the Iraqi side.

At this time, Iraq is no longer the Iraq that it used to be, without any industrial base, Iraq has poached many experts from the developed countries of the West, and in the process of assembling F-20 fighters and F404 engines that began in Iraq, the Iraqi side has been secretly figuring out the various technical means of these fighters and engines, and Iraq has almost had a research team in the aviation industry. ≦≧

After they came into contact with the advanced twin-rotor turbofan engine of the F404 engine, they asked a lot of questions about the M53 engine of the Mirage 4000, and this time, the Mirage 4000 twin engine stopped in the air, verifying some of their judgments, and they firmly believed that the problem was the cause of the engine itself.

In the dispute between the two sides, the Mirage 4000 was also disassembled from the rear fuselage, the engine was removed, and it was completely dissected.

Generally speaking. There are several situations when the engine is stopped: first, the lubricating oil leakage or the failure of the lubricating oil pump, the failure of the lubrication system, and the engine holding the shaft is stopped, in which case there is no possibility of starting again; The second. Broken compressor or turbine blades, or bursting of internal bearings, housings and other important load-bearing parts; third, the engine surges or sucks into the wake of other aircraft or missiles, resulting in insufficient oxygen supply; Fourth. Engine overtemperature, fire jing, etc.

If in the past, French technical experts would have asked for the engine to be shipped back to France for dismantling and inspection, then the cause of the accident was completely stated by themselves, but now. ≦≧ the production line of the Mirage 4000 in Iraq is being commissioned, and the production line of the F404 engine has already begun normal production, and at the insistence of the Iraqi side, the M53 engine has been dismantled in Iraq.

The final analysis is in. The compressor blades of the single-rotor M53 engine showed early fatigue, not because of poor maintenance, but because the M53 engine was not suited to the humid, salty and hot climate of the Middle East. When they were experimenting, they didn't take into account the weather conditions in the Middle East, so. Inhaled air that had not been considered, and there was a lack of adaptation.

However, the blades of the compressor did not break, which indicates that this time the engine stopped in the air for this reason. The end result, the eyes of Iraqi experts. It refers to the common problem of stall and surge of compressor blades.

In fact, the French technicians have already thought of this, they know that their engine, because it is a single-rotor engine, has this congenital defect, but it has been limited by the fly-by-wire system, and this time, the plane did not enter a complex aerial dogfight, but in the process of level flight, how could this phenomenon occur?

The engine is the heart of the fighter, and because the engine problem has not yet been concluded, the Mirage 4000 fighter plane equipped by Iraq has been temporarily grounded. ≦≧

After repeated discussions, Iraqi experts argued on the basis of reason, and finally formed a result: this accident is due to the fact that the engine of the Mirage 4000 has not been adjusted to adapt to the climate in the Middle East, resulting in the early fatigue of the compressor blades of the engine, although it does not look very powerful from the outside, but it has led to the instability of the engine's work, and at the time of the accident, the Mirage 4000 fighter just encountered a vertical air flow in the process of cruising, although the fly-by-wire system spontaneously adjusted, but, Due to the noticeable reduction in the flow into the air intake, however, it led to a terrible surge of the engine, and finally, a stop in the air.

The second mid-air start was successful, but it stopped again, again because of a problem with the compressor blades.

The solution is either to replace the engine blades and improve the adaptation at the same time, or to change the engine!

Improving the engine blades and adapting to the improvement of Xing will make this fighter grounded for at least half a year to a year, because after the engine is improved, it will have to be re-tested and other work, which is a long work. ≦≧

However, this solution was accepted by Dassault, which had no candidate engines.

However, the Iraqi side will certainly not be satisfied with having their powerful fighters on the ground for so long, and, on their land, an excellent aero engine is being produced: F404, the maximum thrust of this engine is only a few hundred kN smaller than that of M53, but, in terms of weight, F404 is lighter, and it should be very suitable to install it on the Mirage 4000, compared to M53, F404 has very low fuel consumption, although M53 is called a turbofan engine, however, the channel is not very high than the dagger, The fuel consumption rate is even higher than that of the advanced turbojet engines of later generations. What's more, the use of the F404 engine on Iraq's F20 fighters has confirmed that this engine can fully meet the climatic conditions of the Middle East.

Moreover, in this way, on Iraq's main fighters, the Mirage 4000 and F20, which are light and heavy, use the same engine, which is very advantageous for logistics support. ≦≧

Therefore, the Iraqi side proposed to use the F404 engine to replace the M53 engine, which is not very reliable, and the Mirage 4000 produced on the Iraqi production line all adopts this configuration.

This plan was strongly opposed by Dassault.

Originally, the production line for the export of the Mirage 4000 did not include the production line of engines, and of the 80 Mirage 4000s ordered by Iraq, the first 10 were produced in France, the middle 20 were assembled in pieces, and the last 50 were only supplied by Dassault with engines and electronic equipment, and the rest were produced in Iraq. The price provided by Dassault for each set of engines and radars is 15 million, and if Iraq does not import engines, then Dassault will lose at least 2 million profits per aircraft, and those 50 will be 100 million dollars in profits!

Therefore, Dassault resolutely disagrees that the arms sales project to Iraq is the largest contract since the establishment of their company, and they will definitely not give up this opportunity to make money.

The two sides couldn't hold out and were eventually reported to Qusay.

Looking at the report, it coincides with Cusay's original idea, the introduction of the F404 engine production line, he made great efforts, he had this idea at the beginning, and now, the Gauls did have problems with the fighter engine, but they did not want to give up this opportunity, and would never agree to change the American engine, it seems that they still have to put some pressure on them!

Qusay immediately asked the secretary to contact the French side, and he needed to personally communicate with Mr. Marcel Dassault about the Mirage 4000, which could have been left to the project leader, but by doing so, Qusay could show that he attached importance to the project.

After two hours, Mr. Marcel Dassault finally came to the telephone, and the long-distance call from the Iraqi side gave him a very ominous feeling, he already knew that this time the engine of the Mirage 4000 had problems in the Middle East.

Dassault also attaches great importance to the Mirage 4000 project in the Middle East, because the Mirage 4000 has received funding from the Middle East, so that the project can continue and reach the point where it can equip the troops.

Although the first to be equipped with the French Air Force, but Iraq in the Middle East, this is more indicative of the vigorous vitality of this fighter, Dassault actively lobbied the French Air Force to equip this fighter, and at the same time, among other potential countries in the world, to sell Marcel's proudest powerful heavy air superiority fighter.

Marcel remembered the last time Qusay came to sign the contract, and at that time he thought that this person was a military commander, an outstanding politician, and at the same time, a bright businessman, Cusay knew what he needed, and the suggestions he put forward made the combat effectiveness of the Mirage 4000 to a higher level, such a person is now dissatisfied with the engine of the Mirage 4000, and the weakness of the Mirage 4000 is the engine!

"Mr. Marcel, the results of the investigation into the engine shutdown accident of your country's Mirage 4000 in our country have come out." Cusai spoke to Marcel in English.

"Yes, we are actively improving our engines and providing solutions to use the environment in the Middle East." Marcel also replied in English.

"This will take a long time, so we hope that we can use the F404 engine that can be assembled and produced in our country for modification and production, and all the Mirage 4000 fighters produced on the Iraqi production line use this engine." Qusay brought it up directly.

"I'm sorry, we have not been in contact with this kind of engine at Dassault, there is no technical data, we can't modify it, whether the engine matches the air intake, whether the fly-by-wire control system matches the engine, whether the flight envelope has been modified, if this is really the case, I am afraid it will take longer." Marcel said that although he was old, he still had a good brain, and casually made these very reasonable excuses. To be continued