For the MD-11, Yang Hui is actually a little hairy in his heart, after all, the accident rate of this 1 aircraft is simply high and terrible, and when it comes to MD-11, it must not be missing its predecessor DC-10 passenger aircraft, because in fact, the target of AVIC Southwest is more similar to DC-10 in positioning, rather than MD-11 design. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

As early as the sixties, in order to meet the new requirements put forward by civil aviation companies, Lockheed and the then Douglas Corporation respectively launched the Type 0 design to fill the market gap between the wide-body passenger aircraft represented by the Boeing 747 and the narrow-body civil aircraft represented by the Boeing 707.

In the 11th era, due to the existence of the "60-minute rule", American Airlines asked Douglas to change the design for economic interests, and reasonably circumvented the minute rule by adding one more engine, and it was also reasonable to think that the take-off and landing performance of the three engines would be better, so the DC-10 scheme became the three-engine design that people saw later.

However, McDonnell Douglas designers also seem to have simply added another engine to the root of the DC-10's vertical tail, and the biggest advantage of such a three-engine design change is that the entire rear fuselage does not need to make too much design modifications, and compared with the traditional three-engine aircraft design that the tail engine is "buried" in the rear fuselage, the exposed vertical tail engine is somewhat "convenient" for engine maintenance.

However, it is this "one more engine" design change that will be pointed out as the root cause of the problem of poor control stability and unstable center of gravity of the DC-10 and its successor MD-11 series aircraft, and it is even considered a major design hazard, plus the DC-10 has indeed exposed many design flaws in its service career, such as the design of the tail cargo door of the DC-10. Then came the General Motors CF-6 engine fan blades that fell off, leading to the crash in Sioux City.

From this time on, this DC-10 seemed to be cursed, and began its experience as a plane crash king, throughout 1979, DC-10 had three major accidents in a row during the year, and these three accidents caused a total of 605 deaths! Of course, it was later found out that the cause of these accidents was not actually directly related to the design of the aircraft itself, but the FAA still demanded that all DC-10s around the world be grounded on safety grounds.

Therefore, whether it is the DC-10 passenger aircraft of the Douglas era, or the MD-11 series newly designed by McDonald Company, these are two civil aircraft that have fallen into evil, so this also makes Yang Hui a little bit empty in his heart, although he himself knows that there are many details in this story that are to be discussed, and even the whole story has some Internet jokes behind it.

In fact, you have to be fair to say that many of the DC-10 "air crashes" were not caused by flaws in the aircraft's design, but a large part of the crashes were caused by human error by pilots, or due to bad weather conditions, or even command errors by air traffic control, or even terrorist attacks such as bomb explosions.

The high incidence of accidents in the entire 1 series, the frequent occurrence of major air accidents is a fact, relatively speaking, Boeing and Airbus aircraft are also a lot in the number of air accidents, but they are not like DC-10 can break out three air crashes in a year, and at most more than 600 people died in a row, probably this can only be regarded as McDonnell Douglas's idea is too back, but this so-called "evil" must also have something to do with Boeing and Airbus's various mercenary armies fanning the flames.

As a serious practitioner in the aviation industry, if he is really confused by the jokes made by Airbus and Boeing to deceive the people who do not know the truth and eat melons, this will definitely be the biggest joke of the year.

Anyway, 1 is already a fairly mature wide-body passenger aircraft platform, for the first time in the field of wide-body passenger aircraft of AVIC Southwest, to ensure that the aircraft will not have a big problem is the top priority, with McDonnell Douglas "evil" mature design model to improve, this is far more reliable than the new development or Antonov to do what An-218 to do.

Generally speaking, AVIC Southwest chose to improve a twin-engine wide-body civil airliner on the basis of McDonnell Douglas legacy MD-11 is certainly no problem, after all, at this time, AVIC Southwest has obtained almost all the design and production materials, and it is most appropriate to choose to develop a wide-body passenger aircraft on the basis of MD-11, but McDonnell Douglas was relatively simple to change from double engine to triple engine when designing, which also led to the fact that there will not be too much trouble when AVIC Southwest wants to change three engines back to double engines.

Now don't talk about the An-218 which is still in the drawings, even if you take the aircraft of the Il-96 to cooperate with AVIC Southwest, it will not cause much turmoil, Yang Hui actually has no other strengths, anyway, he just identifies a road and then plunges to the end, and in the end it is the same thing, but at least he will not make a joke like picking up sesame seeds and losing watermelons because he can't stand the temptation halfway.

At this time, Kinchenko also roughly understood: "A wide-body airliner that has all the design data, that should be the MD-11 brought by McDonnell Douglas before, speaking of which this aircraft is also quite potential, we can still continue to bring it to the market after a change, many design flaws of this aircraft have been exposed and overcome, the only engine problem that has not been solved can also be solved by canceling the tail engine and changing to a conventional twin-engine layout. In this way, the heading control of the aircraft will be well improved. ”

As a professional aircraft chief designer, when he knew that there was no hope for An-218 cooperation and that the future was the world of MD-11 magic modification, he also decisively chose to seek his own role in his position, quickly changed his role, and did a good job as the chief designer of the aircraft, and began to plan the improvement plan for MD-11.

I also have to admit that Kinchenko is a very good chief designer, who can keenly feel the shortcomings of MD-11 in design, and gives improvement measures, and the most important thing is that this improvement actually coincides with the conclusion reached after the previous United Passenger Aircraft Company has investigated the needs of domestic civil aviation companies for many times, so it seems that it is really a talent!

But then again, the MD-11 uses three 28-ton thrust 000 series engines, and the combined thrust of a single 28-ton thrust is a total thrust of 74 tons, and it is really planned to use two engines to achieve the thrust of the previous three combined, which requires at least a single 35-ton thrust.

For such an engine, now AVIC Southwest can only cry without tears, and now it can only provide the use of three engines supporting the Boeing 777: GE-90 and Ruida 000 series, these engines should be said to be provided to the wide-body passenger aircraft developed by the Republic, anyway, Yang Hui feels that it is quite hanging. (To be continued.) )