"32 tons? If only 32 tons of load are required, then the fuselage structure of the An-70 is a little too heavy, and it is very unnecessary for you to use the fuselage design of the An-70. Pen ~ fun ~ Pavilion www.biquge.info this way, if you just require the load of the aircraft to be 32 tons, the cargo hold should be 4x4 size. Among the technicians who came with me from the Antonov Design Bureau, several of them specialized in the design of fuselage frame structures, and they had participated in the design of the fuselages of almost all the large and small aircraft of the Antonov Design Bureau, and this task could be entrusted to them when the time came. ”

Yang Hui said, it would never be useless to recall a large number of technicians from Ukraine at that time, and now it will be of great use! This is the designers who participated in the design of the An-70 fuselage, and when the time comes, let these people properly simplify the fuselage bearing structure according to the design indicators of the new Zhongyun, then the weight of the aircraft will definitely be reduced.

"I didn't expect that among the technicians brought by Chief Engineer Jinchenko before, there are still such precious talents, so I think it should be done like this, as long as the empty weight of the aircraft can be reduced to between 50-55 tons, then we can have a lot of margin in terms of power, which is a rare thing!"

Think at the beginning, the YC-15 transport aircraft 48 tons of empty weight is indeed enviably tight, but now the size of the fuselage of the new transport is naturally larger than the YC-15 upper circle, under the same technical level conditions, the empty weight of the new transport can be controlled between 50-55 is already very good, if there is no Antonov Design Bureau to do this design, the current technical strength of the republic, probably can only control the empty weight at about 60 tons.

And knowing that the empty weight of the aircraft can be controlled to such a frenzied mind, the German side can only silently kneel down to the gods, these years, there is enough technology accumulation is coquettish.

At this time, the Germans even had red eyes, when Nima collapsed in the Soviet Union, why didn't we think of going to the Antonov Design Bureau to raid the house, if we were smarter at that time, it would be possible to move the entire An-70 design team back to MBB!

Grandma's, why do you have to make a report to the company after returning to Germany this time, and you have to go to the major design bureaus after the collapse of the Soviet Union, maybe you can make any new discoveries.

The heart is envious, but at this time, the question about the new Zhongyun can not be sloppy at all: "If the empty weight of the aircraft can be controlled to less than 55 tons, and the maximum load of our aircraft is 32 tons, which adds up to a total of 87 tons, and what we can provide is four turbofan engines with a thrust of 7.8 tons, according to the thrust-to-weight ratio of 0.3 for full load take-off in the plan, the maximum take-off weight of the aircraft is 105 tons, which means that we can carry 17 tons of fuel..."

Before he even finished speaking, the Germans were confused, and the plane could only carry 17 tons of fuel under the condition of extreme load.... It can only carry 17 tons of oil ....

This Nima is really a bit too cheating, just this fuel capacity to supply four turbofan engines, although the CG-2000 engine has a high bypass ratio and low fuel consumption, but 17 tons of oil can ensure that it flies more far?

Now, according to the needs of foreign operations in the new era of Germany or the whole of Europe, the new tactical transport aircraft with a load of 30 tons is directly used as a strategic transport aircraft on the flight range, what can this 17-ton oil do? It definitely can't fly 3000km, and now it seems that this fuel is not enough.

Therefore, the German's face darkened suddenly, and Yang Hui could still see this clearly, but fortunately, Yang Hui had already had a solution at this time.

"This is indeed a problem that we found after calculation, mainly because the new Zhongyun requirements for flight range are different from the YC-15 of the year, YC-15 is a typical front-line tactical transport aircraft, and our new Zhongyun is closer to the category of strategic transport aircraft in terms of range, so the fuel load of the aircraft must be increased, otherwise even if there is an air tanker, it is impossible to achieve long-distance flight with a refueling. So, now I have two solutions to choose from. ”

The YC-15 transport plane that Yang Hui inadvertently revealed during his speech was heard by Chief Engineer Jinchenko, but the old gentleman was speechless, sitting quietly on the side and studying something, feeling as if he was thinking about something.

However, Yang Hui's two plans aroused everyone's interest, and immediately some anxious people jumped out: "Then Mr. Yang, you can talk about it, it would be good if we could have a way to solve the problem in our current situation, please say it's okay." ”

In this way, the first plan surfaced: "Plan 1: We reduce the thrust-to-weight ratio requirements for the aircraft, which can be referred to as the American C-17 transport aircraft, which also requires short take-off and landing on the front line. However, its thrust-to-weight ratio is only 0.27 according to the current public information, as long as we can accept the C-17 take-off and landing indicators, then the thrust-to-weight ratio of 0.27 will make our new Zhongyun maximum take-off weight reach 115 tons, at this time the data of 27 tons of oil is acceptable for our new Zhongyun. ”

Sure enough, the plan proposed by Yang Hui this time is indeed very feasible, although the field take-off and landing capability of the C-17 is not as different as that of the YC-15. state, but it can definitely meet the basic needs of use, and it can also achieve rapid take-off and landing on the front line in some harsh battlefield environments, and can only reach the level of C-17, so the maximum take-off weight of 115 tons obtained by the new Zhongyun with a thrust-to-weight ratio of 0.27 is not excessive.

At this time, there are obviously people among the Germans who are already excited, and it is very good to be able to have C-17 level field take-off and landing capabilities this year, and what other bicycles do you need! At this time, many people have even silently figured out the calculator in their pockets, calculating whether the data given by Yang Hui this time is reliable.

Soon some people began to come up with results, and there were also exchanges in private: "That's right, relax the requirements a little, and then optimize the aerodynamic design of the aircraft, and naturally you can meet the requirements." ”

"The C-17 field take-off and landing index is also very good, and the United States can accept the global deployment of the military, and I think most countries can also accept such indicators."

.....

Listening to these words in the team, only the one who led the team to discuss with Yang Hui before is still a little unwilling, first of all, the short-distance take-off and landing ability of YC-15 is really drooling, and C-17 can indeed take off at 670 meters from a field dirt airport, but that can only be done when the aircraft is empty, and what really wants to make YC-15 or C-17 reach 670 meters of field take-off is that these aircraft have a thrust-to-weight ratio of up to 0.44 when they take off in the field.

Therefore, if the current new Zhongyun learns from the C-17 and can take off empty-loaded after unloading at the airport, the aircraft will only weigh less than 70 tons, and the thrust of four CG-2000 engines up to 31 tons can ensure that the thrust-to-weight ratio of the aircraft is 0.44, so the field take-off of 670 meters can also be done.

It's just that the question now is that how can the transport plane, which is operated by the new China as a front-line handyman, take off empty-load after just transporting things in place like the C-17, as a medium-sized tactical transport aircraft, it is normal to carry some cargo, wounded and the like on the return trip, so it is certainly impossible for the transport to be unloaded on the return trip, so at this time the pioneer role of the US imperialist YC-15 is shown.

The YC-15 requires that in the front-line field airfield, it must also carry a 12-ton load to achieve a short-distance take-off and landing of 670 meters on the return trip, and this must be summed up by the US imperialists after years of experience, and the data will certainly not be made up, which must have a certain reference significance.

Similarly, if the new Zhongyun also carries a load of 12 tons on the return trip, that is, at least 82 tons of take-off weight, according to the thrust-to-weight ratio of 0.44, which requires the power system to be able to provide 36 tons of thrust, and 36 tons of thrust is allocated to each engine to squeeze out a maximum thrust of 9 tons.

On the contrary, if the previous calculation of the maximum total thrust of 31 tons is continued, the thrust-to-weight ratio of the aircraft can only reach 0.37, and such a thrust-to-weight ratio is obviously impossible to ensure that the new Zhongyun can achieve a short take-off at a field airport of 670 meters. (To be continued.) )