The next day, Andrei inspected the last place to go to the aircraft factory, many of the Soviet Union's World War II planes were made of wood, here the engineer introduced: "This is our latest La-5 fighter, its fuselage skin is Siberian birch plywood, the wing is a wooden two-section structure. All movable wings www.biquge.info are covered with a metal frame and cloth skin. But you don't have to worry about the strength of the fuselage, the glued laminate material we use is very good, and the fuel tanks are self-sealing tanks filled with inert gas. Front-line aviation airfields can directly fill the fuel tanks with carbon dioxide, and if there is no one, it is not a big problem. ”

At the same time, Andrey also looked at the data of the La-5, using an M-82 star-type fourteen-cylinder air-cooled engine equipped with a supercharger with a maximum power of 1268 kilowatts. The top speed is 648 kilometers per hour, the initial ascent rate is 1,100 meters per minute, and it takes 5 minutes and 42 seconds to rise to 5 kilometers, the maximum ascent rate is 19 meters per second, the practical ceiling is 10,000 meters, the range is 765 kilometers, the landing speed is 144 kilometers per hour, the maximum use overload is 4.5G, and it only takes 19 seconds to circle at 360' at a height of 1,000 meters.

The prototype was tested in May 1942 and went into production two months later, with 1,182 completed by the end of 1942. In March 1943, the next major production model, the La-5FN, entered mass production, with a 1,650-hp (1231-kW) M-82FN (FN is the Russian word for "afterburner") engine, armed with two 20-mm cannons and four 82-mm RS82 rockets, as well as two PTAB anti-tank weapons, and a two-seater La-5UTI was also put into production, and later production versions replaced the original 20-mm cannon with two 23-mm cannons.

The La-5 is actually a good fighter, the biggest feature is the first leading edge flap structure, the use of a rear three-point retractable landing gear, with a three-bladed propeller and bubble cockpit, and an exposed radio antenna.

And Andrei also knew that he could not do much in terms of technology, so he ended the inspection after learning about the output and process problems with the engineer, because there was still the next place to go, Andrei left and went to the airport with his entourage, Andrei really couldn't stand the train, and in the next few days, Andrei checked several cities near the Urals, and now the enterprises that are moving are almost all there, and most of the military industry is here. It can be said that now this Urals is already operating efficiently!

And on the way, a telegram came to Andrei, Andrei took a closer look, my God, Andrei didn't expect him to have access to a core secret!

Secret nuclear research base

The entire research base is full of elites of the Ministry of Internal Affairs, all of whom belong to Beria's direct family, and any entry and exit of communication and material personnel in the base is under the control of the Ministry of Internal Affairs, not to mention those basically expressionless agents of the Ministry of Internal Affairs who monitor their movements at all times.

When the convoy came to the first sentry post, Andrei had to admire the brains of the builders of the base: the passage to the core area was a huge tunnel, the entrance was guarded by the troops of the Ministry of Internal Affairs, everyone had to get out of the car and pass through the inspection on foot, even if someone slipped by, the fighters equipped with the latest weapons at the gate could shoot immediately, looking at the pillboxes and the vigilant internal affairs troops and the snipers hiding in the heights.

"At the end of the tunnel is a valley, the core research area of the base. All of our ancillary facilities are built around it. The guide introduced.

"Ring protection?"

"No, the living and office area is here, and I've never been to the other side of the core area, and I don't care."

Lin Jun turned around and asked the colonel of the Ministry of Internal Affairs the question in his heart: what shape is this base, and what is it over there?

"The three blockade belts with a depth of 3 kilometers, guarded by troops directly under the Ministry of Internal Affairs, are equipped with mines and barbed wire, and sniper surveillance, and they are indeed circular."

After the inspection of the first post, the group entered smoothly, and not long after entering the tunnel, it was the second sentry, and the major in charge said routinely: "Comrades, please hand over your weapons, no one else in the base can carry weapons except for the guards." ”

Andrei unloaded his gun and handed it over, Yushchenko in the back did the same, the guard platoon stayed here, Yushchenko and Dolnikov accompanied Andrei into the tunnel to the core area, first into a valley, next to which you can see a high-voltage tower, Andrei knew that separating uranium-235 requires a total power supply close to astronomical, and it is impossible to rely on a large power plant alone. There are more than a dozen high-voltage transmission lines that lead to the power plant from all over the country, but instead of exporting electricity from the power plant, it comes from the Novosibirsk grid - the outgoing and incoming directions are reversed.

This is also due to the need for secrecy, and one can imagine how many forces the Soviets have mobilized for the secrecy of this project under these difficult conditions - even the power sector has been brought under the unified coordination of the Ministry of Internal Affairs.

Then there was a visit to the factory and the laboratory, where everyone changed their heads and changed into radiation protective clothing - in fact, radiation protective clothing is not usually needed in the workshops and laboratories, but the base still asked Andrei and his party to change into them for insurance.

This is something that Andrei couldn't touch in his previous life, some things can be named, some things, Andrei doesn't understand, this is the core area of the Soviet Union, the level of defense is simply more important than the Kremlin, Andrei also met Kurchatov, the father of the Soviet atomic bomb, although the intelligence officers of the Ministry of Internal Affairs stole a lot of information, but without the efforts of experts, this development will not be successful!

Some people say that the Soviet nuclear physicists simply copied the results of Western research and did not have any achievements of their own. This statement is one-sided. The development of a nuclear bomb requires talent, money, and a test site, and there are so many things needed.

The atomic bomb can be said to be the highest difficulty in science and technology in this era, and Soviet experts have also paid a lot in nuclear research!

Andrei looked at the father of the atomic bomb and immediately saluted, and Kurchatov didn't expect the chief of the Ministry of Internal Affairs to respect him so much, and he was at a loss for a while, Andrei talked to him a lot next, Kurchatov can actually say that he doesn't want the atomic bomb to appear in the world, but since the country needs it, and this is to protect his own nation, he still devoted himself to research work, and later after the successful explosion of the atomic bomb, Kurchatov returned to Crimea to recuperate. Standing in the old house where his parents once lived, he fell into deep thought: what would parents say if they knew that their son had built the most terrible weapon in human history? Can I be forgiven?......

Andrei also comforted him again and again, "I'm afraid that our atomic bomb will never have a chance to be used, and by the time you study it, Germany should have surrendered!" ”

Kurchatov said: "Yes, but I hope we will never have the opportunity to use it!"

After leaving the research base, the next thing is to have a relaxing trip to the sniper school to inspect, and the principal is Lyudmila, Andrei is also the first time to see this top sniper, a mature, beautiful, temperamental female soldier stood in front of him, Andrei focused on her: Lyudmila does have a special temperament.

And Lyudmila also looked at Andrei, tall, strong, and also an excellent sniper, because many textbooks Andrei had made valuable suggestions!

Lyudmila accompanied Andrei to the training ground, and suddenly two Soviet heroes and snipers came, everyone came around, Andrei had to take out his own goods, everyone took out their notebooks and recorded them carefully, Lyudmila next to him also listened and thought, and finally Andrei said: "Sniping is not only to destroy the enemy but also to protect yourself, all comrades must remember that not only technical sniping depends on the heart!" ”

Then, Andrei and Lyudmila walked together, he sensed that Lyudmila seemed to have something to say, and Yushchenko and Dolnikov, who were next to him, looked at each other and chose not to follow!