Domestic tanks, which are inherited from the T-54A, especially the most classic three-plate and three-rod, including the two-stage planetary steering machine, are all Stalin's bonuses. For a long time after that, the structure and relative position of these manipulators, no one in the country dared to move.

It's a classic!

It was not until the 69 tank that hydraulic assistance was added to it to reduce the strength of the operator for the needs of foreign trade.

Now, out of the needs of foreign trade, it has been improving, in line with the world, and there is a way to operate the steering wheel.

Steering wheel, which is definitely not simply installing a steering wheel can be, tank steering, relying on two tracks with different speeds to control, three plates and three rods, is operated in a mechanical way, and the steering wheel, then there must be a special hydraulic transmission gearbox, through hydraulic control, this is an upgrade of the entire transmission system, and domestic, in this regard, has always been in a weak position.

In the past, the three-liquid prototype car was not processed well, but now, a machine factory has introduced Western CNC machine tools, which has improved the machining accuracy to a higher level, and has advanced processing methods, and over the years, it has also studied a lot of Western gearboxes, such as the original Sherman tank, etc., which can be regarded as accumulating rich experience.

It is no longer difficult to control with a steering wheel, and as for whether the troops are selected or not, it still depends on the will of the troops themselves, after all, the troops are very conservative.

These are understandable, but what does it matter about the location of the tank cab?

Tanks of normal layout, in general, are the same, with the wheelhouse in the front, the fighting compartment in the middle, and the engine in the back.

The front cab has always been deployed on the left side of the country.

This is according to the basic rule of driving on the right, the cab is on the left, which makes it easy for the tank crew to get on and off the car, inherited from the T-54A, all the way to 69, 79, 80, now all the tanks, are designed on the left, however, the Soviets improved it, starting with the T-64 tank, the cockpit was installed in the middle.

Now, Zhu Lao shifted the topic to this aspect, and at this time, hearing his question, Fang Xian continued to shake his head helplessly, when the 123 project was about to be decided, he only felt a heavy burden on his body, and the responsibility was heavy!

"Lao Zhu, you're testing me." Fang Xian said: "The advantages and disadvantages are clear at a glance. ”

Tanks, again, are not used to advance on normal roads, so there is no need to follow the rules of driving on the left or on the right at all, as for deploying on the left, it is just a convention, starting with the T-34, it was deployed on the left, and the Germans were also deployed on the left, and the situation at that time was that on the left was the driver, and on the right was a radioman and machine gunner! On the hull of the tank, there was a forward machine gun. At that time, communication between vehicles required a dedicated radioman.

And now, since Zhu Lao asked, Fang Xian could only answer: "However, the cab is on the left, and there is also a serious defect, which is the driver's vision problem, and the blind spot on the right side will be larger, especially after closing the cockpit, the blind spot on the right side is very large." ”

After speaking, Fang Xian paused, and said in the most professional terms: "According to our requirements, when the driver uses the periscope to observe the battlefield terrain, the vertical field of view angle is not less than 20 degrees, and the distance that cannot be observed, that is, the observation of the dead boundary should not be 8 meters away, and the horizontal field of view should ensure that there are two track widths." ”

"Under this requirement, it is obviously better to have it in the center than on the left, so if we start working on the 123 project, this must be preserved." Fang Xian continued: "In addition, there are some other benefits, such as after entering the battlefield, once the track is pressed against the anti-tank mine, the cockpit in the center has the greatest chance of survival. ”

If you press it on the left, the tankman is next to it, and it is estimated that it will be shaken to the ground, and if it is in the center, it will be better.

"However, having the cab in the middle also brings a flaw." Fang Xian continued: "That is, it is inconvenient for the driver to enter and exit. ”

In fact, the most criticized thing about the mid-mounted cab is this, in the middle, there is a gun barrel above the head! The driver has to have practiced yoga and be soft enough to get in the middle!

Otherwise, you need to turn the barrel to the side when getting on and off the car to facilitate entry and exit, in fact, most tanks do this.

When the tank driver shows his head to drive, he can also see a very obvious scene, the tank driver's head is almost next to the base of the gun barrel, if the turret rotates, maybe a click can squeeze the driver's head off!

In particular, the Western kind of turret is rectangular, and when turned around, the length of the diagonal can definitely squeeze out the driver's head.

"Report, find the target."

"Quick, turn around!"

Click! The driver's head is gone!

Such a scene can be imagined, of course, in fact, it is difficult to appear, when driving normally, it is a head, but it is a marching state, the turret is locked, it will not move, as for the battlefield, if the driver still shows his head, it can only be said that his head is iron enough.

Everyone discussed the specific technical issues, and they all felt a little funny, and when they finished talking about this question, Fang Xian said: "Lao Zhu, you must have been studying the T-72 tank for a long time, haven't you?" Also say that you are not interested in third-generation tanks? ”

Fang Xian still didn't give up, he wanted to dig Zhu Lao from a machine factory, and relying on the name of the third-generation tank, he could fool Zhu Lao.

Unexpectedly, Zhu Lao said another sentence, which made Fang Xian suddenly interested again. It's still possible to fool the old man.

Zhu Lao is so interested in the layout of a cockpit, it is obvious that Zhu Lao is very interested in surveying and mapping the imitation T-72!

As an old friend for decades, Fang Xian is still very clear about Zhu Lao.

Who knows, Zhu Lao's next words made Fang Xian feel uncomfortable for a while, but he didn't expect that the other party actually had such an idea!

"In fact, even if we don't need to copy the T-72 tank, we can improve it ourselves, and the existing second-generation tanks can be gradually improved to third-generation tanks." Zhu Lao said: "What is the difference between the second-generation tank and the third-generation tank? Lao Fang, can you talk about it? ”