… What is the rotor diameter of the mouth meter? Zhang Lan's eyes widened in disbelief! Compared with the rotor diameter of Shenwang and juice machine, which is often more than ten meters, 4 meters? Ahem? Helicopter rotors of this length are probably not even ultralight helicopters, right? It is estimated that it can only be regarded as a model aircraft with relatively high accuracy, and it can't even be brought up by a person.

Will this rotor provide enough energy? Zhang Lan was quite skeptical. Well, now that just two paddle fan engines can do such an incredible job, this is almost a new era in the history of helicopters, and in the history of flying equipment that uses rotors to provide energy, there has never been such a design or that sentence, a layman is a layman.

No, he didn't expect that Xiao Chenxi's words were not finished, "The diameter of the rotor is not long, and if necessary in the future, two more slurry fan engines can be installed, and two larger diameter slurry fans can be replaced, and the wings can be extended and the cabin enlarged with four engines and four sets of pulp fans, and a medium-sized helicopter can be turned into a heavy helicopter by simply turning it." ”

Of course, this so-called simplicity. In Zhang Lan's view, it is just relatively simple compared to Xiao Chenxi, but with the existing technical level of countries in the world, it is still quite difficult to realize what this girl said so easily, just like the double-hair version of the J-7 fighter developed in China: the J-8 fighter. Although it was only changed from a single hair to a double one, the body was enlarged to a certain extent. But this research process has indeed been going on for more than ten years. The performance improvement is not... Astringent is such a simple thing.

In the eyes of others, even any aircraft design company, it is definitely to design a completely new aircraft, but it is not a simple enlargement and basically everything needs to be redesigned, are you joking?

In the past, a big problem that plagued the helicopter to increase the load capacity is the problem of the area brought by the huge rotor of the helicopter, although the load capacity of the medium-sized helicopter such as Mizhuo and Fierce 3 is unimaginably strong, but the huge rotor occupies a huge area when taking off and landing, it is still very headache, if it is not for the United States' deep pockets and the super huge tonnage of the aircraft carrier, "Shao really can't get on the aircraft carrier." Just look at the poor former Soviet Union and now Russia, the same heavy helicopters, Mi out can only fly on land.

"Of course, in order to provide better energy for the aircraft, so that the engine can better play its own performance, a pair of external ducts can be installed around the pulp fan, which can better play the efficiency of the pulp fan engine and suppress the noise of the engine to a certain extent." Little Dawn added a little at the end.

Retrofitting an outer duct? Oh, isn't that a fan engine a turbofan engine with an ultra-high bypass ratio? Zhang Lan muttered. As a paramilitary fan, I still understand this.

If you count it. Frowning, Zhang Lan thought about it very seriously, "This can be regarded as providing a good foundation for heavy helicopters in the future?" In addition, if the wings could be folded upwards like a strong carrier-based fighter, wouldn't it be easy to get on a large naval ship such as a warship or a large amphibious landing ship? Well, you can bring a lot more. ”

There is also a point not to mention, in the future, the country will have aircraft carriers, even if it is only a medium aircraft carrier with a displacement of 410,000 tons, such an aircraft is also very advantageous, under the same conditions I can bring more aircraft than you, what is this advantage? Even if there is no aircraft carrier, there is a large amphibious landing ship with a straight-through deck, which can be temporarily improvised, and let this large amphibious landing ship take on the work of the following small and medium-sized aircraft carriers.

What about replacing the engine with a jet engine with a very large thrust-to-weight ratio in the right case? What will it look like? As long as the aerodynamic layout is appropriate, it should at least be a high-subsonic aircraft, right? On the basis of this aircraft, what would it be like to use the design and manufacturing technology of these aircraft designs and large thrust-to-weight ratio engines that I have mastered to design the aircraft into a vertical and short take-off and landing fighter such as the Yak or the Witch? Zhang Lan couldn't help but start thinking again.

The more I think about it, the brighter my eyes shine: it's all money!

For this, Zhang Lan is looking forward to it: at least such a vertical, short-distance take-off and landing aircraft will not have such high requirements for the take-off deck of aircraft carriers or large military ships, right? At least the straight-through deck is OK, the slip jump take-off deck, steam catapult take-off, are not needed, as long as there is a relatively flat place, it is really necessary, as long as the pilot's skills are passed, the helicopter take-off and landing deck of the frigate and destroyer can even make do with it, anyway, compared with the traditional take-off and landing form of fixed-wing aircraft, the short-distance take-off distance of the vertical and short take-off and landing combat rights is quite short. Well, the tail nozzle technology of the aircraft is a much more serious problem. The vector nozzle that turns from the page is indispensable, "almost." Xiao Chenxi nodded, with a serious look on his face, "There is no big difficulty, and when the technology is mature in the future, it can also be replaced with a new-power engine."

This girl said that it was almost, then it was really almost.

I don't know if the helicopter made in this way should be considered a rotorcraft or a fixed-wing aircraft? Purely using a tiltrotor seems a little inappropriate, right? A little bastard whose sunglasses had slipped to the tip of his nose couldn't help but mutter: That ugly "osprey" made by the Americans. The wing of a tiltrotor is not a supercritical airfoil that is more suitable for high-subsonic flight.

There is no need to worry about the handling and reliability of the aircraft that have plagued the United States, and in terms of the technology that Xiao Chenxi has mastered, if such a simple problem cannot be solved, it will be too embarrassing.

"In that case, how long will it take for the design drawings of this helicopter to be available? Problems with the design of drawings. Zhang Lan began to care more.

"Three days, right? The main part of simulating the wind tunnel test is slightly more cumbersome. The main thing is that how to produce it under the existing conditions is what needs to be considered in the design process. Speaking of this, the little girl looked distressed, the backward production technology level on the earth has caused her a lot of trouble, and the biggest trouble is the production link, "Two helicopters, three days should be fine." ”,

Zhang Lan listened to the Great Khan: After the war, any helicopter or fixed-wing flight right in the world, just the drawing design, its design time has not been less than 4 years, and the girl completed the drawing design in three days, and she still feels very distressed? Is there still a reason for heaven?

Zhang Lan is absolutely convinced. The drawings made by this girl don't even need to be modified at all, and they can be mass-produced directly. Even if four to five prototypes are produced for technical verification in order to obtain production qualifications, it is estimated that the whole process will not exceed three years, as long as there is no human resistance.

But in other words, Xiao Zhang Lan is really not afraid of any resistance, if he is stumbling in China, it is a big deal to go abroad to do it, as long as the things he makes are good, and he has a headache when he sees them, as long as his things are really good. Even the Americans will not be stingy with their own military spending, provided that they do not produce at home. I just don't think there's something quite right.

Well? Wrong! Finally realizing what was wrong, Zhang Lan hurriedly interrupted Xiao Chenxi's words, "Isn't it one?" How did it become two? ”

"One medium, one heavy." The little girl said with a heartbeat, "Since you have been mindful, then you can simply get everything you need." Small.

Smiled bitterly: This girl is really welcome, yes, since you think it's more neat to do things well at one time, then just add a little more burden to you, "Or, sister, you can do two more helicopters, the layout of the traditional single rotor and tail rotor, or the same as just now, a medium-sized helicopter, a heavy helicopter, if there are these four helicopters, which market response is good, let's do which." ”

Anyway, we're not short of money. Now that the most important design work of an aircraft has been completed from design to finalization, so much smaller and a few prototypes are produced, it is really impossible to use them in your own group. A certain bastard thought very irresponsibly.

"Well, that's fine. Small. To Zhang Lan's surprise, Xiao Chenxi nodded without thinking, this girl obviously didn't put the price of a few prototypes of the producer into her heart, it's a big deal to let her people come over and participate in the production of prototypes, anyway, it won't cost a few dollars: make four at the same time, and there will be modern ones and modern ones. Be classic.

"That's what happened. The solution of the materials required for the production of aircraft, the mass production of electronic systems, the layout and adjustment of small production lines, the layout of industrial robots, ultra-high-precision engine processing equipment, and so on are all in charge of you and Sister Alice. Zhang Lan, who finally succeeded in shirking his responsibility, said triumphantly, after so many years. The corresponding technical details don't need to be said by Zhang Lan for a long time, this guy firmly believes that what he thinks in his heart, the girl must know very well.

It's very depressing. Although it is now known as advanced technology, no matter whether the domestic aviation industry is small or a world-class aviation manufacturing power such as Europe, America and Russia, the manufacture of wool machines is still based on manual work, although the processing of parts represents the most cutting-edge technology level on the planet. The so-called aircraft manufacturing line, in fact, should be said to be a manual production line, although the equipment used is definitely not a hammer pipe wrench or something.