The big countries in the East, from the beginning of industrialization, are almost all in the surveying and mapping imitation, positive research and development is basically not, although the Soviets also started with surveying and mapping imitation, but after that, it has been positive research and development, the B-2 engine is made by the Soviets, people have long eaten this engine thoroughly, so only one of them has been changed to this level of power.

In the team, the experts who have studied tank engines all their lives are shocked and emotional.

I can't do it, but Lao Maozi can do it.

Of course, they don't want to change either.

The cylinder center distance is related to the overall length of the engine, and its own 85 tank, or the third-generation tank, uses a longitudinal engine, the engine is longer, but the body is longer, which is enough, but the T-72 tank is a transverse engine, and the engine is long, which means that the body should be widened.

Lao Maozi didn't want to widen the hull, and he didn't want to change the layout of the engine, because there were too many things involved, and changing it would be a major change, which was similar to redesigning a new tank.

In order not to change the tank, it is necessary to toss around the engine, try to squeeze out the potential of the engine, and as for reducing the stroke of the engine, it is useful to reduce the height of the engine just right.

Designing an engine is a lot of process, at the beginning, of course, it is necessary to choose a technical route, this 1,200 horsepower diesel engine in Kartsev's mouth, now of course, is just a design idea, but? It's just that this idea is not simple, which shows that Lao Maozi has this confidence? Without changing the cylinder center distance? The power was raised to the limit of 1,200 horsepower.

I don't know if Zhu Lao heard? What will you think, the current domestic 123 tank is in the process of testing, if it is replaced with this planned engine of Lao Maozi? And the hull of the tank? How can it be shortened by half a meter, or even a meter, if so? That saves two or three tons of weight? And then add this weight to the protection of the car body? Isn't it to be crooked?

Of course? Envy is also useless? After all, the Soviets haven't really done it yet, are they? The domestic ones have already begun to enter the test stage, and from this point of view, it is undoubtedly correct to solve the problem of whether there is or not.

As for the volume of the engine, look at the engines of the West? You can know that your own size is actually very small.

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"How about increasing the core distance? That would increase the volume of the engine? We couldn't fit into the existing engine compartment. Kartsev said: "So? If we continue to plan for new engines, we will have a real headache. ”

Soviet tank features, with a small engine compartment? The engine had to be compact, and if it weren't for the sake of compactness, the T-64 tank would not have used a twin-cylinder opposed engine, and besides, people have now successfully increased the power of the engine to more than 1,000 horsepower, but there is still a long way to go.

In the planning, the maximum is 1,200 horsepower, I don't know how many problems to solve, but after all, this has reached the limit, and then I want to continue to improve the power, which is a headache.

The increase in the core distance and the size of the engine are simply an unsolvable problem, are they really going to stop at this power level?

"Don't you have a gas turbine?" Qin Zhenhua mentioned.

Here, how much can the other party reveal, in order to get enough power in a small volume of engine compartment, the Soviets have long begun to experiment with gas turbines, and the power has long exceeded a thousand horsepower.

Hearing Qin Zhenhua mention the gas turbine, Kartsev's face changed, and he was quite displeased: "That's just Nikolai's mistake, the tank is equipped with a gas turbine, which is not suitable at all." ”

Actually, the tests of gas turbines began long ago, and since 1949, the Leningrad Kirov plant has been tinkering with that set. But after twenty or thirty years of study, there were no good results, there were too many shortcomings of gas turbines, and they were not suitable at all, but at that time, news came that the tanks of the Americans were going to use gas turbines, and in the equipment sequence of the Soviet army, it has always been that the United States has what the USSR wants, so the general designer at that time, Nikolai Sergeyevich, took advantage of the Americans' choice and successfully persuaded the country's leaders to agree to the finalization of the T-80 tank with gas turbines to equip the troops.

Compared with the mass-produced T-64A tank and the T-72 tank, the firepower, protection performance and mobility of this newly numbered tank have not improved much, however, the fuel consumption has increased significantly, and after entering service with the troops, the comparative data is also very clear, the fuel consumption of the T-80B and T-80BV tanks is 4 times that of the T-72B tank. Moreover, it is still aviation fuel that is burned!

I don't know what those guys think, Nikolai, that clown, did a big bad thing!

Kartsev felt very unhappy when he thought about this, but if he wanted to say that he felt disgusting, it must be the Morozov Design Bureau, the T-64 tank they designed was turned into a T-80 tank by the Kirov plant with a gas turbine, and the Morozov Design Bureau suffered the most.

Now, his face is not good-looking, it is not dissatisfied with Qin Zhenhua, it is just dissatisfied with the gas turbine.

"Increasing the core distance of the cylinder can't change the size of the engine." Qin Zhenhua began to give the other party ideas again: "I said, how about changing it to an X-type engine?" ”

In order to increase the power of the engine and improve the ride at the same time, a cylinder is definitely not good, the tractor is a single-cylinder engine, the noise is earth-shattering, and if you want to make the power output of the engine stable, you must have at least a four-cylinder engine. However, for a tank, the output power of a four-cylinder engine is far from meeting the needs, at least eight cylinders, or the commonly used 12 cylinders.

If these cylinders are arranged in a straight line, then the engine is super long, so, in general, engines with more than six cylinders, with a V-shaped structure, the cylinders are inclined to both sides, and the connecting rods are staggered and connected to the crankshaft, so that the size of the engine can be greatly reduced, and now the V12 engine is used, which is this layout.

The X-type engine is equivalent to two V-shaped stacks stacked together, and the tips coincide, looking at this letter, you can understand the shape of this engine, for example, an X12 engine is equivalent to stacking two V6 engines at an angle of 120 degrees on top of each other.

In this way, just as the V-type engine is more official than the in-line engine, the X-type engine can also be much higher than the V-type engine with the same number of cylinders.

Qin Zhenhua began to run the train with his mouth full again, and Wu Ruihua on the side shook his head helplessly, when had you ever heard of the X-type engine? I only used it during World War II.

Who would have thought that Kartsev would really shine in the eye: "X-engine? Sounds great. ”