A high-thrust military turbofan engine can reach the British standard thrust ratio of 6, which is generally good, at least it can be regarded as a first-class level in the seventies, although it is not as good as the first echelon in the eighties, but it can be considered barely.

If the South African plan uses the engine this time, it will be absolutely crazy, but unfortunately, this kind of data does not impress Wang Zhengguo and his party, and there is no need to even ask for advice, Chief Wu said directly.

"We will consider the question of money, now we only need to come up with a plan, how to make an engine with a thrust ratio of 6.5, and we will continue. ”

The most critical core machine and low-voltage fan have been determined to design the plan, and the follow-up can only be tried in other aspects, such as afterburner, accessories, and duct casings, if these things can be done well, they can actually reduce weight.

The question is, can these places still be changed?

The official answer from Rolls-Royce's Spey Project Department: Of course you can!

"If we have to achieve a push ratio of 6.5, of course we can also come up with a plan, as early as 80 years, the TF-41 engine produced in the United States has been installed with a full-authority electronic control system. ”

The TF-41 engine was mass-produced in the United States, with a total of two models, but the finalization was very early, and the full-authority electronic control system was later added as a production improvement to the later factory products, and there was no single model, so the general public did not know.

As the British developer of TF-41, he must be very clear about these, and now he is proposing this matter, which is nothing more than planning to install a full-authority electronic control system for this big push plan, after all, the weight loss effect brought by this thing is very obvious.

Spey and TF-41's early engine control systems are typical of the hydraulic mechanical type, and many bulky hydraulic pipes, mechanical valves, and integrated control systems are dead, and it is naturally best if these things can be replaced.

"The TF-41 is equipped with a full-authority digital control system, which reduces the weight by 100 kg overall, and this time we have also adopted this technology on the afterburner model, and the weight of the control system of the natural afterburner can also be reduced, adding up to at least 130 kg. ”

As long as this program can be successfully implemented, the thrust-to-weight ratio of 6.5 will be about the same, but unfortunately the cost is indeed a bit high.

"It's not technically difficult to switch to full authority electronic control, but you have to know that this is the most advanced engine control system at present, and the Spey project has not introduced this technology before, so you have to add at least 30 million pounds, after all, this is the most advanced technology in the world.

The price of the fully authorized electronic control technology is £30 million, which must be admittedly staggeringly expensive, but can now avoid this cost?

Apparently not!

Not to mention that there is a hard requirement to reduce the thrust-to-weight ratio of the TF-41 engine at this time, the technology itself is very attractive, if you can take the opportunity to learn the technology, the next few decades of domestic aero engine electronic control market can be monopolized.

Thinking about the Taihang on the upper plane, it was because the independent electronic control technology was not up to par that he ran to use the analog electronic control of the Maozi 31F engine reluctantly, which then led to frequent problems.

Therefore, if you really want to be able to learn digital electronic control technology this time, 30 million pounds is expensive, it must be expensive, but the money is worth it, and it must be learned.

At present, Wang Zhengguo has money in hand, but it must not be exposed easily, so let Chief Engineer Wu grind it slowly, not seeking to reduce the price much, at least to get more benefits. ”

With the end of the first day of talks between the two sides, Wang Zhengguo almost understood the general situation, anyway, he didn't plan to join in the fun in the negotiations on the second day, and it was not interesting.

"Wu Gong, this time I will give you a bottom, and the negotiations with Rolls-Royce you look at it, this time our goal is to complete the development of the work on the premise of learning as much as possible, I can give a total of 300 million pounds of project funds, and the follow-up negotiations will not participate, tomorrow I have to go to receive Volvo. ”

...........

As the largest industrial giant in Sweden, a Nordic powerhouse, Volvo Group has many subsidiaries engaged in different production businesses, including Volvo cars/trucks/buses/construction machinery and other companies.

Of course, it is certainly not these subsidiaries that came to the Republic this time, but another company that also belongs to the Volvo Group, known as Volvo Aerospace!

Speaking of which, this Volvo actually made a fortune by making cars in the early years, but the car must have an engine, so it must be made of piston gasoline engines, and then look at the engine used in this car and the aircraft engine before World War II is much the same, so Volvo, which produces cars, naturally entered the field of aero engines.

Although the aero engine and the car engine after World War II parted ways, the whole Sweden also Volvo has the experience and ability to develop aero engines.

A closer look reveals an interesting situation in which many of the world's leading aero-engine companies are linked to one or more of the top automotive companies.

It is true that Rolls-Royce produced aero engines, but in the early days of piston engines, people also produced cars, Rolls-Royce and Bentley were well-known local car brands, but they were later separated.

Not to mention the famous BMW company, which was also the main producer of aero engines before the end of World War II, the car logo blue sky and white clouds in other words, is actually the afterimage of the aircraft propeller under the high-speed rotation.

General Motors owns the famous Allison Aero Engines Company, which produces a large number of turboshafts, low-thrust turbojets, turbofans, and even the American partner of the TF-41.

Nakajima, which produced Shou/Rong/Yu series engines during World War II, also began to produce automobiles after the war, with the external name: Subaru.

Even the rising star of the Republic is not exempt, Dongan Power Company, which produces turbo engines, provides the turbo 5 engine needed for Yunqi, but it also produces automobile engines, and the famous 4G63 has almost intersected with 60% of the automobile companies in the Republic.

Therefore, an aero engine company that does not produce automobiles is definitely not a good aero engine company, and now Wang Zhengguo is entering the aero engine industry, does it mean that it will have to produce cars in a few years?

........

Someone knows very well that it is impossible to introduce RM-8 this time, but it must be put in place, and it is also necessary to have a good relationship with Sweden, you need to know that Sweden is also an industrial power, and it will soon enter the period of secondary two diseases, as long as you pay more attention, you can actually find a lot of good things.

First, he asked the other party for information about the RM-8 engine, and then asked the other party if he was going to discontinue the production of this model, and then asked if it was possible to package and sell the production line.

The Swedes were overjoyed to raise a long list of these questions, but Wang Zhengguo understood one sentence from beginning to end: the RM-8 engine is based on Pratt & Whitney's JT-8D engine, and the sale of this engine technology requires Pratt & Whitney's approval.

Although there are all kinds of "rest assured" and "no problem" after that, they will definitely communicate with Pratt & Whitney in the shortest possible time to ensure the smooth progress of the project sale.

Depend on!

If you want to say that JT-8D is not something I haven't seen, not only that, but the 420 factory in Shudu also had the experience of copying this type of engine back then, and the domestic code name is turbofan 8, but it was transferred to the Modu Automobile Factory halfway.

That's right, another car company that has something to do with aero engines, but the end is tragic, not only imitation

The turbofan 8 of the JT-8D engine was dismounted, and even the Modu Automobile Plant was gone, and as for the so-called Modu Automobile Company later, it was another matter.