At this time, the speed of the plane was very fast, and at high speed, when the front wheel was tripped by the ridge, in an instant, the nose of the plane flipped over, as if the big man had tripped over.

With the belly facing the sky and the back of the plane facing the ground, the whole plane slid backwards and forward, rubbing out sparks one by one with the ground.

Suddenly, a big stone appeared in front of him, and the cockpit canopy collided with the big stone, and it was immediately shattered, and the test pilot Belyakov in the cockpit, looking at the big stone that crashed rapidly, his pupils widened, and he only had time to make a voice in his mouth: "Long live the Soviets!" ”

The plane did not catch fire.

When the personnel in the base arrived, the nearby villagers had already come to watch, they carried water, extinguished the small flames of friction, they looked at the almost disintegrated body, and looked at the pilot who was knocked beyond recognition.

Mikoyan also caught up, his face was ugly, his legs were a little trembling, he failed, this test flight failed again, what was the reason?

Moreover, it also took the life of Belyakov.

"Take the plane back and disassemble it." Gromov also came up, the muscles in his face twitched, and then his gaze showed firmness again.

As test pilots, it is their mission to be accompanied by danger, and when they need to, they know that they are dead, and they have to carry out test flights.

At the beginning, Gromov was also such a person.

When the plane is on the ground, it can still burn steadily, but when it is in the air, why does it suddenly turn off?

This is something that must be addressed.

They moved quickly, and when the engine was sent back to the test flight yard, it was immediately disassembled, and finally found the reason, in a tubing, there were icicles that had not completely melted.

"The temperature in the air is low, almost every kilometer of rise, the temperature will drop by six degrees, and when the plane rises to an altitude of three thousand meters, the temperature has dropped to zero degrees, so that the moisture in our alcohol begins to solidify." The reason for this was finally found out at the cost of the lives of test pilots.

(Baidu, if you follow this calculation, wouldn't the temperature on Mount Everest be tens of degrees below zero?) ）

In experiments on the ground, this kind of problem will not appear, and only at high altitudes will the fault be displayed, which has become the first problem in front of everyone.

The flight altitude of the aircraft is very high, the MiG-3 can jump to an altitude of 10,000 meters, where there can be dozens of degrees below zero, and they use alcohol instead of gasoline, the first problem is that the moisture inside solidifies, what should I do if the oil pipe is blocked?

There are two solutions.

"On the one hand, we can transform the fuel tank and oil pipes into heated ones, so that the temperature inside it is higher than zero, so that it can be used normally." An engineer said.

Fuel tank, oil pipe heating, in later generations have this kind of large-scale application, heavy trucks burn diesel, and diesel will wax at low temperatures, must use low-grade diesel, but this diesel is expensive, not resistant to burning, so there is a means of heating the fuel tank and oil pipe, can burn normal zero diesel.

It's not difficult to say, just change to electric heating, but in practice, there will be problems.

Electricity is precious on airplanes, and electric heating consumes a lot of electricity, and worse, their fuel is alcohol, which can catch fire in the event of any malfunction.

Moreover, it will also cause the complexity of the internal structure, and they will have to overhaul the existing aircraft, fuel tanks, and oil pipes, which is a large amount of work.

Therefore, when they heard this plan, everyone shook their heads, it did not meet the current needs, what they wanted was to make small changes to the aircraft, and it was best to change it without changes, and it was definitely not almost necessary to disassemble the aircraft and replace the heating fuel tank and heating fuel pipe.

It's not appropriate.

"Another option is to increase the purity of the alcohol so that the alcohol content is more than 99.9 percent."

Since it is inconvenient to heat the oil tubing of the fuel tank, then find a way to improve the purity of the fuel.

Several tons of vodka have already been consumed, but vodka with a purity of only ninety-five is still not good, so simply continue to increase the purity so that it is almost all pure alcohol.

In this way, the moisture content in it is quite scarce, even if it solidifies at high altitude, it will not clog the oil pipe, and after entering the carburetor, it is already close to the engine, and the heat of the engine itself is enough to melt it.

Improve the purity of fuel! Hearing this suggestion, Mikoyan nodded: "This is a feasible plan, give this task to the distillery and let them find a way to meet our requirements." ”

"In addition to this, according to the recording equipment on the plane, as well as the report of Comrade Belyakov during the test flight, we found that the power of the aircraft began to decrease significantly as it continued to climb, and we calculated that the calorific value of alcohol is smaller than that of gasoline, and in order to get more power from the aircraft, we need to adjust the amount of fuel so that more alcohol enters the cylinder for combustion."

Soviet aircraft designers found the right solution.

In order to train China's own pilots as soon as possible, Comrade Zhu Rui, then captain of the aviation corps, provided Comrade Jiang Tianran, deputy chief of education of the aviation school, with a copy of the top secret information of the Japanese army and more than a dozen large barrels of alcohol for testing.

At that time, the islanders' experiment to use alcohol instead of aviation gasoline was unsuccessful, and the main reason for the life was a stop in the air, and 31 people died in the test. After Jiang Tianran reported the situation to the school leaders Chang Qiankun, Wang Bi and other comrades, he proposed that China continue to conduct alcohol substitution experiments on its own.

After hundreds of experiments and analyses, they finally figured out the reason for the air stop: it turned out that the amount of alcohol released less energy than aviation gasoline. The solution to the problem is to improve the purity of the alcohol, modify the engine nozzles, and increase the amount of alcohol sprayed, so that the alcohol burns the same heat as gasoline. In the end, they succeeded.

Historically, the island countries were short of fuel, but the Soviet Union did not lack it, but now, the practical predicament forced the Soviet Union to change its thinking and look for alternative means.

They were replacing gasoline with alcohol, which was their best solution, and now, just as Germany had begun to attack Moscow, they had finally found the right solution.

Only by allowing the fighters to continue to fly can they engage the Germans in the air and better protect the land battlefield.