The third more.

――――

This cave is obviously much tighter than other caves in terms of area and defense, so it is a little conspicuous at the moment, and Zhang Yang guessed whether me262 was stored in it. It's just that as soon as he tried to enter, he was politely stopped by two guards with loaded guns.

"Major, a special pass is required to enter the interior."

"I'm just visiting."

Zhang Yang pointed to the dark cave and said that he had no other ideas.

"I'm sorry, but if you need to visit, you can ask Colonel Filin to issue a pass for you, it's our duty, I'm sorry."

Both guards were 1.8 meters tall, with crisp military uniforms and rifles, and were obviously not good talkers. And Zhang Yang and they were all wearing the masks of the hydra, and the two guards were also a little hesitant for a while.

Just when the two sides were at a stalemate, a hearty smile came from the distance.

"Major, I'm sorry to keep you waiting."

Zhang Yang turned around, and the owner of the smile was none other than the leader of this base, Colonel Filin, the Nazi officer smiled heartily, walked over quickly, and shook Zhang Yang's hand. There was also a guard behind him, and Zhang Yang remembered that this guy seemed to be keeping an eye on him, and now it seemed that Colonel Filin had asked him to keep an eye on him.

"Colonel Film."

The two sides exchanged an hello, and then Colonel Film's face sank, glared at the two guards in front of him, and scolded: "You two fools! Don't you know that Major Halst is my guest! Apologize to the major! ”

The two Germans immediately changed their tune and apologized to Zhang Yang: "Major." We apologize to you for what just happened. ”

The two sides sang and harmonized, needless to say, even Bucky could see that the other party was giving himself a disgrace. Zhang Yang's face did not change, and he glanced at Colonel Filin meaningfully, and Colonel Filin directly ignored Zhang Yang's gaze, as if he didn't know it.

"Now I can go in, right?"

"Of course, the whole base is open for you." Colonel Film's graceful bow.

"Humph!"

Zhang Yang snorted coldly and stepped inside, while Bucky glanced at the guard who was following the two of them. I thought that it was fortunate that I didn't open my mouth just now, otherwise it would be troublesome if the other party overheard something.

It wasn't until Zhang Yang walked in that Colonel Filin glanced at the two guards. Give the other party a satisfied look, obviously this matter was planned in advance, maybe before Zhang Yang came here, Colonel Fei Lin guessed the other party's intention to check the base. Now this foreshadowing is just the right thing to do.

Colonel Filin was never a. Despite taking refuge in Hydra, he still has his own little calculations, providing the design drawings of HO229 as his bargaining chip, and his current actions are similar to demonstrations, so that the Baron does not despise himself too much. If it weren't for the fear of Berlin's attention, Colonel Filin would have been more than willing to give his rank to major general.

According to some information he had, many people in the German army secretly joined Hydra, including some high-ranking generals. Hydra's ability to penetrate would surprise anyone, and Colonel Filin was caught in the middle of this group of high-ranking generals. The rank of colonel became a little pitiful. It's just that he had a good grasp of the process of the demonstration, and he didn't do too much.

Zhang Yang led Bucky to the cave, and added an old and cunning evaluation of Colonel Filmin in his heart, in addition to the speculator.

The cave is spacious, about six meters high and twenty meters wide, and as it gets deeper, it doesn't get dark, and there is a row of electric lights on each side of the passage that illuminates the passage.

Feeling the oncoming airflow, Zhang Yang could be sure that the space inside should not be too small, Colonel Filmin followed, walked about twenty steps, and a large iron door appeared in front of him, half open and half closed, Zhang Yang felt the air flow blowing from inside, and he could vaguely hear the whirring wind.

"This is our wind tunnel testing site."

"You may not have heard of a wind tunnel before, but we are one of the few air bases in France that have wind tunnels," explained Colonel Film. ”

With his explanation, Zhang Yang walked into the door, and was greeted by a very spacious interior space, many people in white coats were walking back and forth, and after seeing Zhang Yang who came in, he didn't even have the interest to take a look, and continued to bury his head in the information in his hand, as if the information was made of gold.

Zhang Yang took a few steps forward, his gaze looked past the white coats, through the surrounding desks, and landed behind a large glass window, where two extra-large fans could be vaguely seen slowly rotating, and in front of the fans, an airplane could be seen fixed to the railroad tracks, shaking slightly.

This aircraft is different from the most common piston aircraft today, it has no propellers, only a jet engine under the wings on both sides, and the wings are also different from piston wings, slightly tilted back, showing the shape of a swept wing, although the angle of the sweep is not large.

"This, this is ......"

Bucky, who was standing next to Zhang Yang, had his eyes widened, he had never seen a plane of this type, including the two oversized fans in front of the plane, and he couldn't figure out what it was for. But these news made him quickly realize that the plane in front of him was the new fighter that the German army was about to launch!

Colonel Filin stood next to a somewhat stunned Bucky, looking at his research with a slight pride.

"This aircraft is our newly developed ME262, we found some minor problems after the last battle, and we are making follow-up modifications, and these modifications need to be tested in the wind tunnel, and the final number is confirmed little by little, until the final finalization."

"It's spectacular."

Zhang Yang looked at this huge space with complicated eyes, the Germans didn't know what method to use, and forced out such a wide space in the mountain, which was not only secret and difficult to attack, but even built a wind tunnel in it to conduct various tests of the aircraft!

During World War II, Germany's scientific research level was amazing, a group of scientists who walked in the forefront of science and technology, became Germany's most valuable assets, but unfortunately it did not take long for Germany to lose, this group of scientists was quickly divided by the United States and European countries, including the Soviet Union, the achievement of the country's technical reserves, laid the foundation for the rapid development of science and technology in the future.

Colonel Filin was obviously satisfied with the flamboyant assessment, and he had to say that he was very proud that Germany still had the spare capacity to build such a small wind tunnel during the current resource-constrained war.

"This one is an improved model, the prototype is in another hangar, and if all the tests are up to standard, then this one is finalized."

The sound of the wind tunnel test can still be heard after the glass windows and other sound attenuation measures, and the temperature in such an indoor base is obviously much warmer than outside, I don't know what kind of heating method it is, in short, this wind tunnel brought Zhang Yang's surprise, no less than the previous news.

At this time, a researcher finally noticed Zhang Yang and his party, especially after seeing Colonel Film, his eyes lit up, and he stepped forward quickly, first glanced at Zhang Yang's costume strangely, and then reported:

"Mr. Colonel, the No. 2 improvement plan is still being tested, although it has not yet been completed, but judging from the current number jù, the modification effect this time is not bad, and some of the number jù are much more stable than the previous prototype."

Speaking of this, the bespectacled researcher pushed his glasses and looked at me262 with a gaze full of tenderness: "One thing we must admit is that after tilting the wing back, the stability of the aircraft has been greatly improved, our previous worries are unnecessary, this swept shape of the wing can make the speed of the aircraft faster, I very much believe that in the future the aircraft will definitely be able to break through the speed of sound!" ”

The first sentence pleased Colonel Film, and the latter made him frown.

"The future? No, Mr. Raycent, based on my speculation, I believe this jet will be the first to break through the speed of sound! ”

Colonel Film's words obviously embarrassed the bespectacled researcher, but it was difficult to refute it, and only after listening to the two men's discussion that the researcher's speculation was correct.

The two key technologies of supersonic flight are the generation of jet engines and the emergence of swept wings.

Although the ME262 met both of these criteria, the design of the aircraft, including the crucial engine technology, limited the aircraft to a maximum speed of Mach 0.86, according to the conclusion of the ME262's designer, Willy Messerschmidt, after many tests.

In fact, Messerschmitt only regarded this model as a transitional model, and in many tests of Messerschmidt, the ME262 would drive the aircraft down after diving to a speed of Mach 0.86, which would bring a series of problems, and when the aircraft reached a certain speed, the huge overload would cause the fuselage to disintegrate directly. And after the end of World War II, the Royal Aeronautical Research Institute also confirmed this theory.

Understand the flamboyance of these things, and know that Colonel Film's words are just a wonderful soap bubble.

The researcher then reported to Colonel Filmin on the progress of the follow-up study, in which the general number of Jù changes were not significant, mainly minor modifications to the basic layout of the wing and fuselage, and the Me262's wing was increasingly visible to a single aircraft such as the BF109. (To be continued......)