The actual observation of artillery coordinates finally began after a few days of theoretical knowledge learning...
The reason why it takes several days is because many warriors know nothing about this trigonometric function and other...
I once heard a joke that someone grabbed a pair of scissors and wanted to cut his nails, but found that the scissors were not good, so he wanted to grind... At this time, he found that the whetstone was gone, so he went to buy it. The whetstone was bought.
I found out that I had to sit for the whetstone, so I had to go up the mountain to cut trees... I was so full of trumpets, and in the end I forgot what I had to do.
Wu Dengxiong, the commander of the artillery battalion who is responsible for coordinate calculation, encountered such a thing... By the way, our second company was very casual in fighting, but the mathematics was constantly stuck. When talking about trigonometric functions, I found it necessary to talk about it.
The basic theorem of triangles. When talking about basic theorems, I found that some people don’t know what angle is... When talking about angles, I found that some people don’t know how to multiply...
So this process almost made the artillery battalion leader vomit blood... After a few days of class, he was so angry that his face was bloodless and his eyes were straightened. He kept saying to me: "I'm talking about battalion."
Long... I have to have some basic knowledge of coordinates at least. It's like a series of things that make sense, these two series of things…”
"No!" I said: "This has no discussion. You have to know how to teach, otherwise what should I do if I don't know, otherwise what should I do if I need to call for artillery support when going to the battlefield?"
"Then... aren't there any artillery observers?" Wu Dengxiong was still a little unwilling.
"How many artillery observers are there in total?" I said, "What if the artillery observer is killed or injured? You just want our second company to kill the Japanese, right?"
"What are you saying..." Wu Dengxiong didn't dare to say anything after I was like this. Just kidding, our second company is the hero company... Do you dare to let our second company defeat the Japanese? This is a mistake
Do you know that in this era... everyone is afraid that others will put a hat on themselves.
So Wu Dengxiong had to walk to the podium with a green face.
But after all, it still doesn't make sense... The soldiers' foundation is too weak, and some of them don't even know how to multiply oral dictation. How can you let others learn this trigonometric function?
Well... In the end, I saw that I couldn't hold on anymore, so I stood on the podium and said, "Comrades, do you know what the use of learning this?"
"Count the distance!"
"Report coordinates!"
...
"That's right!" I said, "You know the use of this, but do you know... Why should I let you learn it?"
The soldiers under his command were stunned. After a long time, someone replied: "Aren't you indicating the target for the artillery comrades?"
"It can be said yes, or it can be said not!" I sighed helplessly: "Look at it... Our battalion has an artillery battalion and an artillery company, and a total of dozens of artillery pieces... I'm still thinking about it
, which class and which rank should learn how to register coordinates... I will divide it into several cannons, and now it seems..."
"Battery Commander! Let's learn..."
"Battery Commander, we'll do it soon! Give some more time!"
...
Before I could finish speaking, the soldiers robbed them like something... This is not good for being a soldier, but it is good for gold or silver, just like this weapon that can save lives on the battlefield, let alone a few cannons for them.
So the enthusiasm was immediately mobilized. If you never have the multiplication, you will memorize it immediately... You have to memorize it if you don't sleep. If you don't know how to multiplication, you will calculate one by one. If you don't eat, you have to finish the questions.
Liang Lianbing even gave his own soldiers a death order: If anyone drags our platoons and gets rid of our platoons, I will cut off the things in his crotch as a cannon!
As a result, in a few days, I actually chewed this trigonometric function...
This made Wu Dengxiong complain in front of me with a bitter face: "Battery Commander! Wouldn't you have been using this method long ago? I have suffered so many days of sin in vain!"
Alas! Didn’t I just think of this?
Of course, I believe many of them still know the reason but not the reason. That is, they memorize the formula and then put the data in.
But then again, our purpose is to fight wars, so that the shells will be shot accurately, so as long as they can calculate correctly, you will know how to calculate, regardless of whether he really understands it!
Then we go to the field to conduct on-site calculations. The first thing we need to do is to calculate the distance between two points, that is, the length...
Of course, you can't use a meter ruler to measure this length. Who will give you time and opportunity to measure it with a meter ruler on the battlefield... This artillery naturally has artillery methods and tools, otherwise this method will be a trigonometric function.
Tools are things they call "steering wheel", "benchmark" and "calculating wheel".
I have seen this steering wheel and benchmark in modern times. When building a house in construction, I often see people aiming at this thing...
Now I know that this thing is measuring the angle... Just to measure the distance between points a and b, of course, it is impossible to directly read the distance between points a and ab using the steering wheel.
The method is to construct a triangle, such as inserting a red and white marker at the right or left of point a few dozen meters away. Assuming that the marker is point c, this will form a
The triangle consists of three points b and c, and the length of ac is known.
Then, using the steering wheel to aim at c from points a and b, we get two angles... Well, we know that the two angles and one side of the triangle can find the length of any side of the triangle, what is the sine
,cosine, tangent, cotangent theorem, turn a few times on the calculation disk, then add, subtract, multiply and divide, and you will get the distance between points ab.
This calculation disk is a mechanical calculator used to calculate the sine cosine value... There is an aluminum disc with a diameter of about 20 cm on this thing, with dense scales engraved on it. Just adjust the scale to what you want
In terms of degree, the two plastic sheet pointers will point to the corresponding sine cosine...
As for the tangent cotangent... Anyone who has read books knows that the sine cosine is turned around and reversed and then you can get it.
Liang Lianbing just didn't believe it, so he could calculate the length. He kept saying that it was fake... How could it be? He just took a photo with this ghost thing. There was no measure of a and b, and he could know theirs.
Distance? Then he was really serious... he actually found a rope to pull it from point a to point b, and then measured the length... Hey, he kept shouting: Fuck it!
Of course, the distance between points a and b cannot be the enemy's target, because if the enemy's targets are all aimed at the steering wheel on the top, is it still necessary to bombard?
Therefore, the two points a and b are on the trench on the ground. After calculating the length of this ab, it will be easy to deal with. The observers of the two points aim at the same target of the enemy on the opposite side at the same time... They will soon get two angles,
Then, from the calculation of two angles and the length of ab, we calculate the exact distance between our army's positions and the enemy target...
OK! If the artillery position in the rear knows the coordinates of our position at this time, the coordinates of the enemy position will be calculated by adding this distance and angle. If you don’t know, use known orientation objects such as some known coordinates.
Highland, calculate the distance and calculate it in the same way.
Of course, if you want to launch a shelling, you have to calculate the elevation of the target... The shell is a parabola, so just knowing the coordinates is not useful, because the bounce points of things with different heights at the same coordinates are different. The elevation is also used.
The method is that the triangle is turned over and over, and after a few times, you can calculate the enemy's coordinates and elevation clearly.
The principle is very simple... After all, it is a question: you know the two corners and one side of a triangle, find the length of the other side... I believe that anyone who has learned relevant knowledge will do this question
.
But...it's not that easy to do.
The difficulty lies in measuring the angle of the target... It is actually not difficult to measure. You just need to aim the steering wheel at the target and then read the reading.
The difficulty lies in... there must be two people who read the angle of the same target at the two points ab at the same time... and it is very likely that the two points ab are still very far apart.
So you must first be able to contact the two points of ab, the method is to connect with the walkie-talkie or a telephone line.
Then a is the subjective... the full name is the subjective observation point, sending a message to the side view (side observation point): "Aim at the enemy castle about ten meters away from the left side of the pine tree..."
This sentence sounds like an easy sentence, but in fact, you may be stunned by the side view: pine trees, which one is there? The left side... in your direction, it looks like the left side, in me
This direction may be on the right side...
So after searching for a long time, I couldn't find the crux that I was referring to. I could even find the wrong target and get a completely wrong coordinate.
Only then did I realize that artillery observers are really not simple. According to Wu Dengxiong's words... this requires long-term cooperation between artillery observers, and can have a clear understanding between subjective and side viewing, which is more tacit understanding than between husband and wife...
Words can help side-view understand which goal to capture and respond quickly.
And this is nothing. The most exciting thing is that all these actions must be completed within ten seconds... Subjectively describe a target by the phone, the main, the steering wheel is aimed at the target at the same time, and the side view is the subjective
Report the reading, and calculate the required data subjectively based on your own reading plus the reading on the side viewing newspaper with the assistance of the assistant pulling the calculation disc, and then calculate the distance of the target immediately from the two points known to be ab...
How did this be done?!!
I couldn't help but be stunned... Especially in the last step, the previous step can be said to be practiced to make perfect. The last step requires two angles and one side to calculate the length of the other side... It can also be calculated in a few seconds
?This modern computer also requires time to enter data, which is not something that can be done in a few seconds!
Note: This is the method of artillery observers in the 1970s, and modern laser rangefinders can be used. (To be continued.)