Chapter 1543 Find the Reason

At this time, the speed of the plane was very fast. Under the high speed, when the front wheel was tripped by the field ridge for a while, the nose of the plane turned over in an instant, as if the big man was tripped.

With the belly facing the sky and the back facing the ground, the entire plane slid forward, rubbing the ground one by one with sparks.

Suddenly, a large rock appeared in front of the canopy, and the cockpit cover collided with the big rock, and it was immediately smashed into pieces. The test pilot in the cockpit, Belyakov, looked at the big rock that collided rapidly, his pupils widened and his mouth widened. There was only one voice in the room: "Long live the Soviets!"

The plane did not catch fire.

When the personnel in the base arrived, the nearby villagers had already run over to watch. They carried water and extinguished the small flames that were rubbing against them. They looked at the almost disintegrated airframe and the pilot who was hit beyond recognition.

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

Moreover, it also took the life of Belyakov.

"Take the plane back and dismantle it for research." Gromov also came up, the muscles on his face twitched, and then his eyes showed firmness again.

As a test pilot, it is their mission to be accompanied by danger, and to conduct test flights when they know they are dead.

At the beginning, Gromov was also such a person.

The plane can still burn stably on the ground, but when it reaches the air, why does it suddenly turn off?

This is a problem that must be solved.

They moved quickly. When the engine was sent back to the flight test house, they were immediately dismantled. Finally, they found the reason. In an oil pipe, there were icicles that had not completely melted.

"The temperature in the high altitude is low. Almost every one kilometer rises, the temperature will drop by six degrees. When the plane rises to an altitude of three thousand meters, the temperature has dropped to zero degrees. In this way, the moisture in our alcohol begins to solidify." This The reason, finally found out, was found at the cost of the life of the test pilot.

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

In the experiment on the ground, this problem will not occur. Only when it is at high altitude will the fault be displayed. This has become the first problem in front of everyone.

The flight altitude of the plane is very high. The MiG-3 can jump to the altitude of 10,000 meters. There can be dozens of degrees below zero. We use alcohol instead of gasoline. The first problem is that the water inside is solidified and the oil pipe is blocked. What should I do? ?

There are two solutions.

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

Fuel tank and oil pipe heating have been applied on a large scale in later generations. Diesel fuel is burned in heavy trucks, and diesel oil will form wax at low temperature. Low-grade diesel must be used, but this diesel is expensive and not resistant to burning. So there is a means of heating the fuel tank and the oil pipe, which can burn the normal zero-number diesel.

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

Electricity on planes is precious, and electric heating consumes a lot of electricity. What's more, their fuel is alcohol, and if there is any failure, it may directly catch fire.

Moreover, it will also cause the complexity of the internal structure. They have to make major changes to the existing aircraft, including the fuel tanks and oil pipes, which is a considerable 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. Heating tank and heating pipes.

This is not appropriate.

"Another option is to increase the purity of the alcohol to a level above 99.9 percent."

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

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

In this way, the water content inside is quite rare, even if it solidifies at high altitude, it will not block 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 fuel purity! Hearing this suggestion, Mikoyan nodded: "This is a feasible solution. Leave this task to the winery and let them find a way to meet our requirements."

"In addition to this, according to the recording equipment on the aircraft and the report of Comrade Belyakov during the test flight, we found that the power of the aircraft began to decline significantly as the aircraft continued to climb. We calculated that the alcohol The calorific value is lower than that of gasoline, and in order to get more power for the aircraft, we need to adjust the amount of fuel to allow more alcohol to enter the cylinder to burn.”

The Soviet aircraft designers found the right solution.

The use of alcohol instead of gasoline has also happened in history. It was in the northeast of China, just after liberation, and got a batch of planes from the island countries, but there was no gasoline. In order to train China's own pilots as soon as possible, the then captain of the aviation team Zhu Zhu Comrade Rui provided a top-secret information of the Japanese army and a dozen large barrels of alcohol for testing to Comrade Jiang Tianran, the deputy education director of the aviation school.

At that time, the island people's experiment to use alcohol to replace aviation gasoline was unsuccessful. The main reason was the parking in the air, and 31 people died in the experiment. After Jiang Tianran reported the situation to the school leaders Chang Qiankun, Wang Bi and other comrades, he proposed that China continue to carry out the alcohol substitution test by itself.

After hundreds of experiments and analysis, they finally figured out the reason for the parking in the air: it turned out that the energy released by burning with alcohol is less than that of aviation gasoline. The solution to the problem is to improve the purity of alcohol, modify the engine nozzle, and increase the amount of alcohol sprayed, so that the combustion energy of alcohol is the same as that of gasoline. In the end they were successful.

Historically, island countries lacked fuel, but the Soviet Union did not lack it, but now, the plight of reality forces the Soviet Union to change its thinking and find alternative means.

They were substituting alcohol for gasoline, which was their best solution, and now, just as Germany has begun to attack Moscow, they have finally found the right solution.

Only by letting the fighter planes continue to fly can we fight the Germans in the air and better protect the land battlefield. Without air supremacy, there is nothing.