Collins McKennie is a pillar-level technical master of Rolls-Royce, and in just one month after his appointment, he came up with a preliminary design draft for the core machine.

After receiving a call from Collins McKennie, Chen Geng was a little incredulous: So fast?

Although this is not very technical and difficult with the engines of this series, it is a bit too exaggerated to be able to complete the draft design of the entire core machine in such a short time in an almost single-handed way, right?

But it's unbelievable is unbelievable, Chen Geng doesn't believe that Collins McKennie will use his reputation to play such a boring joke with himself, not to mention that although the real design was completed by Collins McKennie in an almost single-handed, but COMAC still provides more than 30 aero-engine engineering and designers to assist Collins McKennie in his work, even if Collins McKennie lies, those old employees of COMAC who assisted Collins McKennie in the design can't lie, right?

After thinking about it, Chen Geng picked up the phone and called Fang Zhiqiang, the chief engineer of the original Chengfa Factory: "Old Fang, just now Mr. McKennie said that he has completed the preliminary design draft of the core machine, you go with me." ”

Knowing the meaning of his boss's phone call to him, Fang Zhiqiang agreed happily without saying a word: "Good boss." ”

........................

Although Collins McKennie has joined COMAC for a short time, he is no stranger to Fang Zhiqiang, one of the leading experts in the field of aero engines of COMAC, and Collins McKennie is not surprised at all by Chen Geng's behavior of bringing Fang Zhiqiang: if the boss does not bring an expert to look at his design, it is a problem.

After a brief pleasantries, Collins McKennie excitedly introduced his design to Chen Geng and Fang Zhiqiang......

"In order to reduce the production cost as much as possible, and to ensure that we can smoothly produce and sell these three series of engines, I have determined two characteristics at the beginning of the design: one is modular, and the other is to use the existing mature and even relatively backward technology as much as possible......"

Knowing that Chen Geng was not so proficient in technology, Collins McKennie said this, paused slightly, made a gesture and said to Chen Geng: "If you make an analogy, the structure and materials are at the level of the early 60s in the United Kingdom, well, that is, the technical level of the 'Spey' MK505 engine on the 'Trident' passenger plane is lower than the technical level of the 'Spey' MK202 introduced by your country." ”

Chen Geng immediately looked at Fang Zhiqiang...... He doesn't understand the technical stuff either.

Fang Zhiqiang nodded slightly to Chen Geng, saying that Collins McKennie was right, the design of his core machine did use a large number of mature, even mature, and somewhat backward technologies.

Chen Geng nodded: "Okay, you continue." ”

Chen Geng does not think that there is any problem with the approach and choice of Collins McKennie, in terms of the technical level of the weak domestic aviation industry chain, even if Collins McKennie comes up with the best design, if the domestic aviation material supply capacity and processing capacity cannot keep up, it can only be shelved?

From this point of view, Chen Geng feels that Collins McKennie's thinking is very rational and clear, as for the problem of backward original design, this is not in a hurry, for example, the PT6A series turboprop engine and PT6B series turboshaft engine of Pratt & Whitney Canada were designed in 1958, and the overall technical level is equivalent to the technical level of the core machine designed by Collins McKennie. Tapping the potential, the PT6A and PT6B series have been firmly occupying their market until 30 years later, and it seems that it should not be a problem to continue to struggle for another 50 years, since the PT6A and PT6B series are no problem, what is wrong with this design of Collins McKennie?

Collins McKennie's only concern before was whether Chen Geng would be dissatisfied with his lack of use of advanced technology to design this core machine, but now, after confirming that Chen Geng had no objection to his design ideas, and even agreed with him, he also breathed a sigh of relief, and after introducing the basic architecture of this core machine to Chen Geng and Fang Zhiqiang, he said again: "In addition, through the number of compressor stages, By adjusting key parameters such as the number of nozzles in the combustion chamber and the air flow, the engine output can be flexibly adjusted from a minimum of 80 hp to a maximum of 350 hp.

And even when the output power reaches 350 horsepower, the safety margin of this core machine is still very high, in the future, with the development of material technology and the progress of science and technology, we can completely replace the compressor blade material, turbine disc, combustion chamber shape, nozzle structure and other corresponding components by replacing new materials, as well as by replacing the digital fuel control system to more accurately control the engine, so as to increase the vortex front temperature and increase the output power of the entire engine. ”

Collins McKennie's tone was smug.

"Mr. McKennie, you mean the potential of this engine is much more than 350 horsepower?"

Collins McKennie's words made Chen Geng surprised and delighted: what he wanted was just a general-purpose core machine with an output power of 100 to 300 horsepower, but the performance of this core machine designed by Collins McKennie was so powerful?

"More than 350 horsepower, of course," Collins McKennie said proudly: "My goal is to build on this core machine and eventually increase the thrust to 550 to 600 horsepower." ”

“......”

For a while, in addition to feeling in his heart that the top turbine aero engine design master was Niu X, Chen Geng had nothing to say at all, all he could do was pat Collins McKennie on the shoulder: "As long as it is needed for this project, no matter what it is, you can just speak." ”

Hearing Chen Geng say this, Collins McKennie's face couldn't help but smile: "Boss, don't worry, I won't be polite to you, I have 20% of the company's shares, in order to put the product into production as soon as possible and get dividends, I am not less interested in this project than you." ”

"Haha......" Chen Geng nodded happily: "Collins, according to your R&D plan, when will you be able to make a prototype? When will you be able to make the first technical verification machine, and when will it be fully put into production?"

"Pratt & Whitney Canada's PT6A and PT6B were designed in 1958, installed and flown in 1960, froze in 1962, and put into full production in 1963. At that time, it was still the early stage of the development of turbo engine technology, and many things had to be explored slowly, but now, the entire design and verification process of turboshaft engine and turboprop engine has matured, and the technical difficulty of this core machine is lower than that of the PT6 series core machine......

Three years!"

Stretching out two fingers to Chen Geng, Collins McKennie said confidently: "As long as you can guarantee the support of our company, I guarantee that if it is fast, it will be two and a half years, and if it is slow, it will be able to achieve finalized mass production!"

"Three years, right? Okay, then I'll give you three years!"

Chen Geng patted his thigh, since Collins McKennie dared to make a three-year mass production commitment, Chen Geng was not polite to him: "Within three years, I will meet all your needs, including applying for technical assistance and support from Rolls-Royce, I don't care what you want, as long as the final result." ”

"Boss, trust me, I won't let you down," Collins McKennie said confidently, "I need to remind you that you need to find a target customer for our engines as soon as possible." ”

PS: Sorry brothers, please wait a few minutes.

Hearing Chen Geng say this, Collins McKennie's face couldn't help but smile: "Boss, don't worry, I won't be polite to you, I have 20% of the company's shares, in order to put the product into production as soon as possible and get dividends, I am not less interested in this project than you." ”

"Haha......" Chen Geng nodded happily: "Collins, according to your R&D plan, when will you be able to make a prototype? When will you be able to make the first technical verification machine, and when will it be fully put into production?"

"Pratt & Whitney Canada's PT6A and PT6B were designed in 1958, installed and flown in 1960, froze in 1962, and put into full production in 1963. At that time, it was still the early stage of the development of turbo engine technology, and many things had to be explored slowly, but now, the entire design and verification process of turboshaft engine and turboprop engine has matured, and the technical difficulty of this core machine is lower than that of the PT6 series core machine......

Three years!"

Stretching out two fingers to Chen Geng, Collins McKennie said confidently: "As long as you can guarantee the support of our company, I guarantee that if it is fast, it will be two and a half years, and if it is slow, it will be able to achieve finalized mass production!"

"Three years, right? Okay, then I'll give you three years!"

Chen Geng patted his thigh, since Collins McKennie dared to make a three-year mass production commitment, Chen Geng was not polite to him: "Within three years, I will meet all your needs, including applying for technical assistance and support from Rolls-Royce, I don't care what you want, as long as the final result." ”

"Boss, trust me, I won't let you down," Collins McKennie said confidently, "I need to remind you that you need to find a target customer for our engines as soon as possible." ”