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Liu Xiaofeng is still staying: size, power, speed ... These key technological points are considered, even in the air, the oil pipe has been considered, this is still a discussion, this is already determined to have a direction, next Is the project officially established? Not right!

Liu Xiaofeng suddenly remembered a thing, and he said: "Mr. Chen, there is something wrong.

"Oh?"

Listening to Liu Xiaofeng said so, Chen Li is really curious: "What is wrong?"

"Engine, engine is wrong,"

Liu Xiaofeng said: "Mr. Chen, do you say that the Brazilian is a double hair used?"

"Yes, the information I have got is like this,"

Chen Geng's head: "What is wrong?"

Liu Xiaofeng took the thigh: "This is the biggest wrong, medium-sized tactical transport machine, is it suitable to use four engines for reliability?"

"It turned out to be this,"

Chen Geng suddenly laughed, he nodded: "According to the usage habits of various countries in these countries, using 4 engines, it is indeed possible to provide the largest flight safety guarantee, but Mr. Liu, with C-130 and An-12 Why do the median tactical transport aircraft use 4 engines? Just because of the factors in reliability? "

Wang Da Zhi, who did not speak since Chen Geng, silently plugged: "In addition to reliability, the biggest reason is that the two countries in the time, and they can not find the 7000KW turn-level turbo screw paddle engine. At that time, the two countries in Mi Su said that no matter the conditions for reliability or reality, the two 3000 kW turboproach engines were selected as the best choice.

Liu Xiaofeng's consciousness wanted to refuse, he could open his mouth, he closed his mouth.

It is also a senior management person in the aviation industry. Liu Xiaofeng naturally clearly in the final 1950s of the 1940s, the jet engine just in the end of the 1940s, and this thing is still a new one. The key indicators such as life, life, reliability, and thrust, especially engine life and reliability, these two most critical indicators are even miserable, and the life of military jet engine usually only three hundred to 500 hours, even This is also the same, the reliability is more

The life and reliability of the turbine jet aeronautical engine is so miserable, then the life and reliability of the turbine propeller engine based on the jet engine, the life and reliability of the turbine propeller engine are naturally, which is the beginning of the 1950s. After the Second World War II heavy transport machine (C-130 transporter and An-12 transport plane just mentioned at the time?

The technical indicators are properly technical indicators of heavy-duty transporters, just later as the technology is developing, it is a medium-sized transportation machine)?

C-130 and An-12 in order to ensure reliability?

Plus the turboprop engine that is really not so high at the time?

Then just like Wang Da Zhi just said, refund the second, but also for reliability?

Selecting four engines into an inevitable choice.

"But now it's different?

"

Wang Dafu then said: "Look at the current turntile engine, whether it is CFM's CFM56 series or IAE International V2500 series, even our business flight group 'Tay' series and RB211 series?

Whether it is thrust, reliability, overall life, overhaul cycle ... these all indicators?

Which one is not rolling the previous generation of medium tactical transportation machine? "

"This is ..."

Liu Xiaofeng thought carefully?

It is really like this?

Not far from?

That is, when the middle of the end of 1990?

How long is the life of the scriptop-6 turbine propeller engine on Y-8? Theoretical data is 800 hours, in fact ... and heard the "TAY" of Shangfei Group.

The service life of the series has exceeded 5,000 hours, while the life of the RB211 series has exceeded 8,000 hours ... Thinking of this, Liu Xiaofeng can't help but feel: can't be more than, it is really no more than.

" ... is not right?"

"

Liu Xiaofeng suddenly remembered one thing?

I can't help but ask: "I didn't remember the wrong words?

Do you have a large transport machine in Western flights?

The engine is the RB211 military version of your business? It is said that the biggest thrust is 175 kWh? "

"Yes.

Wang Da Zhi nodded.

"If this is the case, the new medium-sized transport machine is directly used by the 2 military version of RB211, why do you use 4 'Tay' MK8 Series?"

Liu Xiaofeng couldn't help but ask: "According to the RB211 series, it is even more than the RB211 series.

The fuel consumption is lower, the overhaul cycle and reliability are also better, the 'Tay' series is just a medium conversation ratio.

"What we said, we also considered,"

Wang Dazhi affirmed: "The main still sees the result of communicating with the army, if the army can accept the two military version of RB211, it is better, and it is also for the use of units and ground maintenance It can guarantee the versatility of the large transporter and in maintenance, but if the army is safely, you can choose four 'tay' series, everything will see the results of communication, now it is still a bit early.

"This is ..."

Liu Xiaofeng nodded and said that he understood it.

Indeed, the army is indeed conservative in the use of equipment, especially if they form an intrinsic concept for a certain equipment, they want to reverse this natural concept is very difficult!

Even you all believe that the medium-sized tactical transport machine should use four turbine propeller engines, then what is the best for the military's ultimate users of the army for the engine of the medium-sized tactical transport machine: It is estimated that they are replaced with the scroll from the scrubtap It's very laborious, then change from four vortex fans to two vortexes? The difficulty is definitely the hell!

Huh? Not a good ... Liu Xiaofeng suddenly found out that this will, don't seem to boycott the medium-sized tactical transport machine uses the turntile engine? Wang Dazhi's savvy, saw Liu Xiaofeng's subtle show that the change will know what happened, he smiled and handed Liu Xiaofeng and said: "After all, it is different, you can also understand, you can see it again. Old Maozi and Diago - 330, Il-214, An-148/178, Dongpu's C-2 or even the Brazilians of the Brazilian, which states that the current aerospace engine has been reliable for medium-sized tactical transport aircraft. The engine is enough.

Speaking of this, Wang Dazhi said: "But it is also, in front of the international flight across provision, in order to ensure safety and reliability, you have to be Boeing 707, Boeing 747, the four engines, Most most, I have to be DC-10, MD-11 three, but now, Airbus A330, double-screen MD-11 and even Boeing 767 began to fly this intercontinental route, this is Technical progress.

Liu Xiaofeng gave a down, finally, nodded slowly.