Chapter 688 It turns out that the most radical one is here!
After listening to Gao Zhendong's words, whether it was Fenglei Factory or the Land Loading Bureau of the National Defense Work Committee, they all admired Gao Zhendong. This is the application of research. All aspects must be considered, and no one can compete for one city. Gains and losses in one place.
This is easy to say, but very difficult to actually do it.
The more the comrades of Fenglei Factory thought about it, the more wonderful it became, and on this basis they began to discuss it.
This is normal. There is more than one way to solve a problem, and the same method also has different details and trade-offs.
"General Engineer Gao, if this shape is adopted, can the burning area be increased?"
After speaking, the comrade drew a more complex pattern on the blackboard, and its perimeter was indeed Much larger than a star. The increase in the cavity cross-section perimeter means that the cavity combustion area in the entire cylinder increases.
Gao Zhendong nodded first: "Well, the cross-section of the combustion cavity can be designed in this way, which can greatly increase the combustion area without directly burning the shell."
The comrades of Fenglei Factory were smiling brightly, learning and applying it, and their learning was not in vain.
Gao Zhendong then shook his head: "But it's not appropriate to use it here. Two reasons. First, the processing of this shape is extremely complicated, the processing cost is high, and the yield rate will be reduced, further pushing up the cost. This is a rocket, not a ballistic missile. A very important core requirement of the former is that it is cheap enough, but it does not matter for the latter. That thing is already ridiculously expensive, and the core requirement is functionality and performance.”
A battalion fires a salvo of rockets. Even the original 19 130-gun fires are nearly 200 rounds of rockets. They are so expensive that they can't afford it.
After listening to his words, the comrades of Fenglei Factory nodded clearly. Indeed, they did not consider the processing issue.
“Second, in this structure, there are a large number of weakly connected grain columns. During storage, transportation, transfer, etc., they may break and fall off after being impacted. As a result, the mechanical properties of the propellant after forming are affected. Such as tensile strength, etc., there are higher requirements. If you want to meet these requirements, you need to pay a lot of other costs, which is more expensive. In fact, the star-shaped burning surface originally has this problem, but the star-shaped combustion surface is relatively more expensive. It’s a better balance, considering the benefits, I can accept it.”
It’s still money!
Comrades from the National Defense Working Committee and the Land Loading Bureau couldn't help but be moved when they saw this.
Chief Engineer Gao tried his best to make it possible for us to be able to afford and use it as much as possible, instead of having to worry about firing every time.
To engage in applied research, advanced technology does not mean that everything is included. It also has to strike a balance. Under the premise of meeting the requirements, the cheaper the better. Sometimes advanced technology may not necessarily be used in specific projects. Better to use.
Seeing that he had almost said it, Gao Zhendong said: "These two technologies are the basis for extended range. They can be used on all rockets and can achieve what was mentioned above without greatly changing the size. , to achieve a range increase of more than 20 kilometers, we must consider more things on this basis."
Comrades just remembered that they had been talking for a long time before finishing the first option. Plan, there is also a larger range.
For this matter, the comrades of Fenglei Factory still have a say. They have thought of ways, but the results are not good.
"Chief Engineer Gao, do we need to lengthen the missile body?" After Gao Zhendong changed the propellant and engine configuration, the potential of the original missile body was basically exhausted. It was more than 20 kilometers away. In any case, this projectile size cannot be achieved.
Gao Zhendong nodded: "Well, if you want to build a bomb of more than 20 kilometers, this is a must. As for how far it can be pulled, you can redesign it according to the requirements for the projection weight."
Generally speaking, lengthening the engine will mean lengthening the warhead simultaneously. Otherwise, it would be boring to just drop a small bomb after all this effort. And there is another reason, that is, the farther the range, the accuracy will decrease. In this case, the accuracy compensation solution that the large warhead can provide Much more, like cluster bombs.
When the comrades of the Land Installation Bureau heard this, it was better to choose a day than to hit it. Make a rough decision first, at least form a rough outline of the basic indicators, so as not to have to run around.
They communicated with the comrades at Fenglei Factory and decided on the size of a new warhead, which was much larger than the original one.
With this projection data, the comrades from Fenglei Factory did some calculations on paper. With the parameters of the new propellant, they can roughly estimate it.
A range of 25 kilometers requires a missile length of more than 1.7 meters.
This is normal. Gao Zhendong knew in his previous life that the length of a 122mm rocket when it has a range of 40 kilometers is about 2.9 meters.
Of course, there is an invisible premise here, that is, the projection weight of 122 fire is much greater than that of 130 fire.
Gao Zhendong estimates that the propellant and engine technology he has developed are basically similar to this 40-kilometer rocket. Combined with the caliber gap between 122 and 130, it can hit 25 kilometers at about 1.7 meters. , which is considered the limit.
The comrades at Fenglei Factory were very satisfied with this result.
“Well, it’s no problem to install this size on the 230 four-wheel drive off-road vehicle.”
The 230 four-wheel drive off-road truck is a copy of the Lao Maozi Gas 63, although it has the "Gas 63" , has a bad reputation of "turning over when turning". In fact, at this time, this vehicle is still a very good military four-wheel drive off-road truck for us, and it is a good wheeled chassis.
The original 130 fire was installed on this chassis.
The length of the original 130 Fire was about a little over 1 meter. Regardless of the calculation, the new 130 Fire is 0.7 meters longer. In fact, this length is not a problem for the 230 off-road vehicle, because the original 130 Fire It's too short and doesn't even use half the length of the truck's cargo area.
In fact, compared to the original 130 fire, the 230 off-road vehicle is a little overflowing in terms of length and load. Gao Zhendong asked: "What about the load capacity?"
The comrade from Fenglei Factory said: "The load capacity is no problem. The load capacity of the 230 is already 1.5 tons, and the imitation is completed. After that, a new steel was obtained with high strength, so 2 The load capacity of the 30 off-road vehicle is higher than that of the GAZ 63.”
In his previous life, Gao Zhendong knew that the load capacity of the 230 was not optimal due to the strength of the steel. To increase the strength, steel was added, and the steel was added to drag. Even if it doesn't move, the load capacity has not increased even though it is calculated inside and outside.
As for why the load capacity of the current 230 has been increased, he doesn’t know.
Seventeenth Machinery Department: Why on earth, don’t you have any idea?
Hearing this, Gao Zhendong thought for a while and made a suggestion: "Comrades, why don't we just lengthen the missile body a little longer, to about 2.7 meters, and do it for 40 kilometers!"
For a 40-kilometer bomb, based on the caliber of 130, the length of the bomb is roughly estimated to be about 2.6 meters, but the tube needs to be a little longer to leave some room and also has the potential for upgrades.
As soon as Gao Zhendong said this, all the comrades in the Land Installation Bureau were stunned.
Holy shit, you want the whole thing in one go, right?
Only then did the comrades of the National Defense Working Committee remember the legend about Gao Zhendong in the committee.
"When Comrade Gao Zhendong makes do, it's really makeshift, but when he becomes radical, he will definitely scare everyone to death!"
After a long time of doing this, you were frugal on one end and improvised on the other, and in the end It’s all here, right?
Gao Zhendong analyzed: "If the 230 chassis is properly designed, it is barely possible to install a 2.6-meter pipe. And the cost of the rocket is all on the bomb. We stretched the pipe to 2 The Mi-6 has two types of 1.7-meter 25-kilometer standard bombs and 40-kilometer extended-range bombs. It doesn’t matter, but we can’t live without it. Anyway, if we don’t use it, we won’t spend any money. Don’t worry, if we build the 25-kilometer bomb together with the 40-kilometer bomb, we won’t spend much money on research funds.”
For Gao Zhendong, 40 kilometers must be completed. This is very important to his ambition.
Gao Zhendong slapped his chest loudly. He didn't know what others thought, but when he looked at the expressions on the faces of the comrades in the Land Decoration Bureau, they were really shocked, excited, confused, etc., all intertwined together.
Gao Zhendong didn't say much, he just looked at them with a smile, "I've taken the bait, it's up to you whether I take the bait or not."
The comrades of the National Defense Work Committee looked at Fenglei Factory: "Have you evaluated whether the 2.7-meter pipe, plus the weight of the bomb, can be carried on the 230?"
Fenglei Factory The comrade quickly opened the 230 truck part of the old 130 design materials, estimated it for a long time, and nodded.
“If you have 15 tubes, you can! 19 tubes is a bit reluctant.”
As for the number of tubes, Gao Zhendong is not worried at all. As long as it is built and easy to use, the army will naturally follow the "True Fragrance Law" to find a useful chassis for it and increase the number of tubes.
The comrades of the Land Installation Bureau discussed for a long time and seemed to have made up their minds. The main reason was that 40 kilometers was too fragrant. They also found Gao Zhendong’s reason why he didn’t need to spend too much money to make sense.
Although it is not necessarily possible to see things 40 kilometers away, it is difficult to say because we have planes and scouts.
There is a saying that goes well: "I can use it, but I can't live without it."
They also discussed it with the comrades of the National Defense Work Committee, then turned to the comrades of Fenglei Factory and said: "In this way, this plan of 15 tubes and 2.7 meters will be taken into consideration."
The comrades of Fenglei Factory were very happy and happily wrote it down.
After writing it down, they are actually the ones who are most worried.
"General Engineer Gao, just increase the length. We don't doubt the range, but the accuracy is not to mention 40 kilometers. We are worried about 20 kilometers."
Gao Zhendong He smiled and said: "Is it true that once the length of the projectile is increased to more than 8 times the caliber, the accuracy drops sharply?"
The reason why the old 130 fire length is only about 1 meter is here. If it is longer, it will cause problems. question.
With some memories, the comrade from Fenglei Factory thought for a while and slapped his thigh: "Yes, yes, yes! It's amazing, Chief Engineer Gao! But the reason can't be found, and there is no problem with the missile's spin, but the accuracy is not good. "
Gao Zhendong smiled and said: "What do you use for 130 fire? The turbine rotates stably, but there is a big problem with this method, that is, when the aspect ratio increases, the impact of nutation on the accuracy of the rocket during flight will deteriorate sharply."
( End of chapter)