Thermal expansion and contraction are a basic physical property, which is very common in nature.
Normally, thermal expansion and contraction will not affect too much. However, when the Blackbird reconnaissance aircraft is flying at high altitude at Mach 3, the temperature of the friction surface between the airframe and the air will reach more than 300 degrees at this time. The thermal expansion and coldness at this time The shrinkage is much more serious, and the body will be stretched by more than ten centimeters!
Therefore, in this case, Blackbird’s fuel tank cannot use a sealing rubber ring like ordinary fuel tanks, so it is deliberately designed as an elastic box body, and the fuel tank will automatically seal when flying at supersonic speeds. This is also considered originality.
If you leave room for expansion, you are not afraid of squeezing, but it brings a new problem, that is, the problem of oil leakage occurs when it is cooled.
After all, the Blackbird does not fly at three times the speed of sound at all times. For example, in the hangar, the oil leakage is very serious, and there is often a pool of oil under the fuselage, which flows everywhere.
This secret is only known to those who have come into contact with it, and now, Nathan is just a naval aviation soldier, how can he even know this inside story
Everyone put away their contempt, and think about Nathan's brilliant "battles" again and again. They felt that they didn't need to provoke themselves.
At this moment, Graham had also walked over with the dinner plate and casually said to Nathan: "I really don't know how the Soviets solved this problem!"
The US planes need to expand and contract, so the Soviets need not? What methods did the Soviet Union use to solve it
The Soviets’ solution, of course, was the Soviet’s way. In fact, Nathan from later generations has long known that the Soviets’ ability to integrate is definitely the most powerful.
Take the S-300 system, for example, after the domestic military experts dismantled it, they were not advanced in one aspect alone. However, Lao Maozi just integrated these inadequate things into advanced anti-aircraft missiles.
And now it is the same, how to fly to three times the speed of sound? How to deal with thermal barriers? The American way of thinking is to use tall titanium alloys, while the Soviet way is to use stainless steel!
The coefficient of thermal expansion of stainless steel is small, so it seems a complicated problem in the eyes of the Americans, and it is almost not a problem in the hands of the Soviets.
However, Nathan can’t say too much now. I just said that the oil spill was just to show these innocent guys a little bit of color and let them shut up. You can’t say too much, otherwise, Amy next to him. Li, she must be suspicious, but she came from the CIA.
Nathan thought this in his heart, and said: "As for how the Soviets solved it, a large number of military experts should have disassembled the plane? They should have known it a long time ago."
This plane certainly couldn't fly by itself, and it was too slow to ship and transport, so it was natural to take off the wings and transport it directly by a transport plane.
At the time of dismantling, a large number of military industry experts must have discovered the problem, and now that the plane has been transported here, it must have been dismantled one by one and then restored, right
"Military industry experts are studying it, it seems that the dismantling has not yet begun." Graham said.
Haven't dismantled it yet? What are they doing? Nathan suddenly felt very strange. Ordinarily, the Americans were quite interested in the Soviet MiG-25 fighter, and they wished to cut it off immediately.
Moreover, when I came here today, didn’t I say that I only had the opportunity to fly at night
"This is confidential, Major Nathan, wait for a while to finish eating, I will take you there, today I have no flying mission." Graham said.
Since he picked up Nathan during the day, Graham's energy is not at his best, so he has no mission tonight.
"Okay." Nathan never likes to break the casserole and ask to the end. Besides, he knows the answer to the mystery. What's the point of asking
The three of them were together and soon finished their dinner, and then, under Graham's leadership, came to a hangar.
The door of the hangar is sealed. When you come to the hangar, you can see a group of experts studying the aircraft.
Well, there are old acquaintances among them.
Michael Pelehach, the senior designer of the Tomcat fighter. Last time in Miramar, Michael Pelehach watched a wonderful performance. His Tomcat, Nathan, has a soul in the hands of Nathan, and he is inspired. Now , When he saw Nathan again, he immediately stretched out his hand.
"Nathan, why are you here?" Michael Pelehach was strange.
"I'll fly it." Nathan said: "This plane can fly to three times the speed of sound. For a pilot, I really want to control it."
Hearing Nathan’s words, Michael Pelehach shook his head repeatedly: "Yes, every one of our major aircraft companies has sent test pilots to fly this aircraft, but now, we don’t even dare to power it up, let alone start it. Disassemble it."
This efficiency is too low, right? Nathan couldn't help asking: "What's the matter?"
"Here." Michael Pelehach took Nathan and pushed aside a few waves of people, and finally came to the cockpit ladder. There was a platform next to the ladder, allowing the two to see clearly.
"This pin is gone." Michael Pelehach said: "Beside the pin, there is a Russian text that means danger."
There is a pin called Dangerous, but now this pin is gone. Everyone hasn’t found it everywhere. Maybe it was lost during transportation. It’s even more likely that the pin was pulled out when Belenko got off the plane. , And then I don’t know where it was thrown.
What does this pin mean
A group of experts are studying.
The MiG-25 is the most advanced fighter of the Soviets. How to prevent this fighter from being acquired by the enemy is also an aspect. Then, are there any traps
Among these experts, there are those who developed the U-2. They are quite clear in their hearts that there is a self-detonation device on the U-2 aircraft, and that button is similar to the one that was unplugged.
The pilot is required to press the button before ejecting the parachute, but in fact, the moment the button is pressed, the plane is blown up and the person disappears, so that the secret can be kept to the utmost extent.
So, will the Soviets do the same
They didn't dare to turn on electricity, nor did they dare to dismantle. They would blow up if they didn't know where to dismantle.
The plane has been here for several days, but they hesitated in front of this pin. Moreover, according to the news from the intelligence personnel, when they asked about this pin, Belenko’s The answer is quite vague.
They didn't dare to do it! (End of this chapter)