Messerschmitt sighed: "Don't say I don't know, I'm shocked when I say it!" It is no wonder that the development cost of jet engines is so high, and I think that a lot of materials and processed parts have to be scrapped during the trial production process. ”

Philip nodded, "That's right! Compared with piston engines, jet engines have complex structures and a large number of parts, and the working environment of the main parts of jet engines is usually in a working state of high temperature, high pressure and high-speed rotation. Therefore, the test of parts and components and the test of the whole machine are very strict, and even several prototypes we produce have to be tested to scrap in the end. In the process of trial production of parts, more will be scrapped. ”

Speaking of this, Philip secretly said in his heart, this is already very easy. You must know that in the development process of aero engines in later generations, dozens of prototypes will even be scrapped. The development of new aero engines should go through one step of test and one step at a time, and from the components to the whole machine, it must go through many cycles of design trial production tests to reach the practical stage, and even after it is put into use, it is still being tested, so that the problems in the design are fully manifested, and then improved. Even in the later development of aero engines, the test accounted for half of the development cost, and the manufacturing had to reach about 40 percent, and the design accounted for only 10 percent. Like the very famous F100 turbofan engine in the United States, the total number of engines used in the test has reached more than 100!

Messerschmidt thought for a moment and said: "In this case, we must design and build these test equipment ourselves, otherwise we will not be able to grasp whether the parts processed by BMW meet the requirements." This point should be made clear at tomorrow's coordination meeting, and unified arrangements must be made, otherwise when the parts are produced, there is no way to test, which will seriously affect the development progress! ”

"Not bad!" Philip stood up, "I still have to plan well tonight, otherwise tomorrow this coordination meeting will be in vain." It's getting late, I'm going to have to say goodbye, and it's going to take me hours to get the whole thing out of this trial production. ”

Messerschmitt also stood up and said in a deep voice: "Philip, then I will work hard for you. You see that I, the chief designer, can only be in a hurry on the side, and I can't help much. It's up to you! ”

"Dr. Wiley, what are you talking about!" Philip was a little displeased, "You must know that we are now a community with a shared future, so we don't want to divide each other." Okay, you can stay. See you tomorrow! ”

With that, Philip walked to the door. Messerschmitt also followed him to the door and stood still, and said to Philip: "Philip, don't work too late, it's not a good idea for young people to stay up late for a long time!" ”

Philip nodded and said, "Dr. Wiley, don't worry. You should also rest early, and you will be required to preside over tomorrow's coordination meeting. ”

After saying goodbye to Messerschmidt, Philip headed for his guest house at BFW. He also thought a lot along the way, and tomorrow's arrangement can be said to be very important, and even related to the success or failure of jet engine development. Although the structure of the wind and thunder jet engine is much simpler than that of the later high-thrust jet engine, and it is impossible to carry out comprehensive and complex tests in the process of trial production as the later generation of jet engine development, some basic tests are still essential.

Philip believes that with sufficient financial support, if the Wind Thunder jet engine is not as fast as the centrifugal jet engine developed by the Englishman Whittle, you must know that this Whittle could not even pay the patent fee of 5 pounds when it was in the most difficult time, and now the Wind and Thunder Project has 5 million US dollars of financial support, if it cannot be successfully developed in one or two years, then it can only be said that his ability is too poor.

Philip began to recall the development of jet engines in history, that is, in the early 20th century, European engineers began to experiment with gas turbines, but these early experimental turbine engines had too high fuel consumption, several times higher than the same power piston engines, to apply such gas turbines to aircraft, it would face difficult technical problems, the most important of which was lightweight heat-resistant alloy materials, and the design of suitable compressors, and combustion systems.

Later, in 1926, Alan Griffiths, an engineer at the Royal Aircraft Factory in Farnborough, England, proposed a concept of gas turbine based on the combination of axial compressor and turbine, in which the turbine drives the propeller blades, rather than directly relying on the jet flow to generate thrust, which is actually the prototype of the turboprop engine. However, the research conditions at that time were not very good, so the research progress was very slow. And as recently as 1929, the Englishman Whittle also began to focus on jet propulsion gas turbine engine research, and he proposed the concept of using a centrifugal compressor instead of the axial compressor proposed by Griffith. Although this centrifugal compressor is relatively backward, later jet engines do not use this compressor, but use axial flow compressor, but at this time, the development of centrifugal compressor is obviously much less difficult, and it is easier to achieve in the actual manufacturing process.

But it is a great pity that no one sees how promising the development prospects of this momentum are. Although Whittle patented his invention of the centrifugal jet engine, no company or government agency was willing to fund his research. Even the British Ministry of Aviation believed that this design required long-term investment, and it was difficult to successfully build a usable product in the short term, so Whittle could only realize his jet engine dream on the drawings. It wasn't until 1936 that he received investment from a private bank, founded the Jet Power Company, began trial production of jet engines, and a year later built the first, then the second, and then the third, until 1939, when the British government recognized the enormous potential of this advanced power, and began to formally incorporate it into the Air Force Development Program. The development of the British's jet engine actually began after Whittle was hired by Rolls-Royce, and it was not until 1944 that the first mass-produced Wieland jet engine became the power of the Meteor fighter.

The German jet engines were also carried out almost simultaneously, and the German aero-engine industry carried out the development of two important turbojet engines, one at the Junkers engine division and the other at BMW. By 1943, Dr. Franz presided over the design of the Jumo004 jet engine mass production, from the beginning of research and development to the start of mass production took a total of only a little more than four years, its thrust is less than 1000 kilograms, but the weight is close to 720 kilograms, the life is only 25 hours, the thrust-to-weight ratio is very low. The BMW 003 turbojet engine, developed under the leadership of Hermann Osterridge, was also a great success.

But now, the process is about to be rewritten, and the practical jet engine will appear ten years earlier and be installed on the aircraft of the Dragon Soul Ordnance Complex.