Let's go," Zhang Lan nodded very unrighteously, and secretly worked on the paddle fan engine in his heart, so I would like to ask Brother Zhu Zi and Brother Tiepi to the two of you. ”

"No problem!" The heroic voices of Brother Zhu and Brother Iron Skin sounded in the room at the same time, "I promise to come up with a suitable design for you in about two months, but to explain one thing, whether it can be produced or not is none of our business." ”

Fainted, hearing the words of Brother Zhu Zi and Brother Tiepin, Zhang Lan almost fainted, you are lightweight, the engine design is completed, and the rest of the things are none of your business, what about the design of the entire aircraft? Zhang Lan remembers very well that in China's aviation design circles, there is a saying that "it's not that we can't design it, but that you can't do our design." "When the time comes, Brother Zhu Zi and Brother Tiepi will throw the things they designed in front of them, but in the end, they can't produce them because their production accuracy can't be achieved, wouldn't that make people depressed to death?

The most difficult thing about this damn tiltrotor is that its design structure is complex, especially in the development of wing rotation structure and rotating nacelle structure, which is the most difficult of the difficulties - of course, except for the higher performance of the propeller fan engine, this thing is more difficult, if the development of the tiltrotor Americans are still more or less confident, then the development of the propeller fan engine Americans almost do not have much confidence, even the United States has long been difficult to make breakthroughs in the paddle fan engine - Because the design problems of these two structures have not been well solved, they will appear in the process of the V-22 "Osprey" tiltrotor flying down one after another. Even in 2C00, when the technology of the V-tiltrotor was relatively mature, two MVs of the U.S. Marine Corps fell.

Of course, although V-has such and such problems, no one denies that the tiltrotor represented by V-is indeed a very excellent aircraft, which combines the dual characteristics of fixed-wing aircraft and rotorcraft, to a certain extent, can be regarded as representing a development direction of rotorcraft aircraft in the future. If the technical conditions are ripe, it is not impossible to replace the existing geogyro for a period of time in the future.

Not for anything else, but because in addition to being able to take off and land vertically like a gyroplane, in terms of speed, it can be twice as fast as a traditional rotorcraft, and the range is several times that of a traditional helicopter!

Still take the V-"Osprey" tiltrotor as an example, under the conditions of short-distance taxiing and take-off, the combat range of this aircraft can reach 1850 kilometers, and the range of adding two auxiliary fuel tanks has reached an astonishing more than 3892 kilometers, which is almost kilometers! And if you refuel in the air? Oh, and it can take off from the continental United States and reach any region of the world, i.e. such an aircraft has the "global self-deployment capability" demanded by the Americans.

And ordinary helicopters, there are almost a few that can reach more than 1 kilometer, even if it is a heavy auxiliary fuel tank, the range does not exceed 1850 kilometers, want to have a "global self-deployment capability"? Don't even think about it, even the United States needs its own powerful naval and air force to carry out transportation.

Flying faster and farther, and being able to take off and land vertically like a helicopter, what is not satisfying about this new way of flying aircraft that seems to have a bright future? If there must be one, it's technology. The current manufacturing technology of ground tiltrotor is really not mature. And, it seems, this technology has so far only been in the hands of the Americans.

Obviously, Zhang Lan is going to snatch meat from the bowl of the Americans and eat it, although this is not the first time.

"Who will carry out the design of the fuselage?" Zhang Lan asked a few people present, "Especially the linkage design between the two engines?" This needs to ensure that the rotors can still rotate normally even if an engine is shut down in an unexpected situation. ”

V - the huge engine nacelle of this deflector rotorcraft is not a good target for local anti-aircraft missiles or even anti-aircraft artillery - although no matter what kind of aircraft it is, as long as it is hit by anti-aircraft artillery or missiles, the fate is the same - in order to solve the problem that the aircraft will not be unable to fly because of the loss of torque when one engine is damaged and stopped, the linkage mechanism designed by the Americans between the two engines, when any one of the two engines breaks down and stops, The engine on the other side will transmit the power on its side through the linkage mechanism to maintain the tension balance of the whole aircraft, so that the two sets of rotors can still rotate normally, so that the aircraft will not crash due to the imbalance of the tension of the whole aircraft.

This design is a very bullish design, and of course, Zhang Lan has to take it: this situation is very common, the engine suddenly stops in the air, and the engine is hit by a sniper rifle with a heavy anti-materiel sniper rifle, which may cause the engine to be empty

Or have to be forced to stop, in order to ensure the balance of the tension of the whole machine, the brake allows the rotor of the engine that was stopped because of damage to continue to rotate has become a problem that has to be considered.

"Leave it to us," Xiao Chenxi and Alice glanced at each other, "Since Brother Zhuzi you designed the required paddle fan engine, then the fuselage and the most critical linkage mechanism will be left to us." When designing, we can also design online at the same time as Brother Zhuzi, to ensure that all functions can be completely matched at the beginning of the design. ”

"Well," Brother Zhu and Brother Ironskin's voices rang out again, "It's best this way, with Princess Dawn and Alice involved, then there will be almost no problems with the design of this plane." There's never going to be a series of things like that damn rotten osprey. ”

"That's right." Zhang Lan nodded, if there was still a problem with the things jointly designed by Brother Zhuzi, Brother Tiepin, Xiao Chenxi and Alice, it would really make people laugh out of their big teeth.

After thinking about it, Zhang Lan was a little late, "But, sister, and Sister Alice, you still have to carry out the transformation of the production line, are you busy?" ”

"When we are renovating the production line, we can design this tiltrotor while renovating it," Xiao Chenxi said, "Have you forgotten?" These design work, in fact, is just a simulation in our system, and the design of this thing only occupies a very small part of our system resources, which has no impact on us, and is a little pastime when transforming the production line. ”,

I sweat! Zhang Lan patted her head in admiration: All the computer simulation designs are very good! I just don't know when the company's self-proclaimed elites - of course, even if the real aviation designer elites see Xiao Chenxi, Alice, Brother Zhu and Brother Tian's design, it is estimated that the only result can only be ashamed of themselves, although there has been an avionics design department led by Varoga before is ashamed and sincerely calls Xiao Chenxi a teacher - Zhang Lan smacked his tongue: It seems that until now, Xiao Chenxi and their little girls' systems have not been running at full speed, It seems that according to Xiao Chenxi's words, so far, the use of their system resources has not exceeded five percent.

"Let me ask," since there is no need to worry about this problem, Zhang Lan asked a little greedily, "according to your predictions, how fast can this plane fly?" ”

"Then I would like to ask, how big do you want this plane to be?" Xiao Chenxi asked, "We can't be sure how big it is, so we can't preliminarily calculate the speed of this plane." ”

"It's the size of an American V-Osprey tiltrotor." Zhang Lan thought about it, and it seemed that there was only such a good reference object at present, "By the way, it is best to be able to distinguish our aircraft from the American V-at a glance when designing, so as not to damn Americans say that we infringe." As she spoke, Zhang Lan muttered softly, "When the time comes, there will be another lawsuit that cannot be fought, and this is the favorite trick of damn Americans." ”

Forgive Zhang Lan for this, now Zhang Lan can think of replacing the propeller engine used on the Yankee's V-22 with a double-row counter-propeller fan engine similar to that used on the An-70 wide-body short-take-off and landing medium-sized military transport aircraft jointly developed by Russia and Ukraine.

Of course, Zhang Lan, this kid, didn't think about replacing the paddle fan engine with a turbojet engine or turbofan engine with a relatively small output, but this always has to go step by step, right? Don't be in such a hurry, this can be left for later development, and sometimes it may not be a good thing to do it in one step.

It is not impossible to switch to a turbofan engine, and from a technical point of view, there is no problem at all, but the safety issue is a big problem. It's just that Zhang Lan hasn't thought about it yet, how to ensure that the pull of the plane can be balanced after the engine on one side fails and stops in the air, instead of turning in circles there - the working mode of the turbofan engine is not the same as the working mode of the turboprop engine/propeller engine, that guy needs to spray out high-temperature and high-speed airflow to direct the airflow of the other engine to this side? This seems to be a bit difficult.

"Is it as big as V-22," Xiao Chenxi frowned and thought for a while, "V-used two T-ADD turboprop engines from Allison with a single power of 6,150 horsepower," he turned his head and asked Brother Zhuzi, "Brother Zhu, what is the performance of this propeller fan engine you designed?" Also, pay attention to fuel consumption, not too high, otherwise it will be meaningless.