Chapter 507 How to change Thunder-1
Mr. Luo left happily with the harvest, and the comrades from the Institute of Guidance and Research came happily with the plan.
Strictly speaking, it’s not a person coming, but a call to ask for Gao Zhendong. Gao Zhendong still has to go there. This is the overall plan for the new missile body modified by Thunderbolt-1. There are too many people involved, and they come to look for him in a swarm. Gao Zhendong is not suitable, and Gao Zhendong cannot be so trusting.
Originally, it was ready two weeks ago, but with an order from the National Defense Working Committee, the Institute had no choice but to temporarily suppress its mood and wait.
Gao Zhendong rushed to the Guidance and Research Institute at the agreed time. Everything was already ready and waiting for him to arrive.
When the chief engineer of the Thunderbolt-1 modified model saw Gao Zhendong coming in, he greeted with a smile: "Chief Engineer Gao, sit here and sit here. You are here. We have been waiting for you for the past two weeks."
This It’s true, if this meeting is not held, Thunder-1 will not be able to move forward.
These days, people are crazy about getting equipment, and they race against time. It is different from the 21st century, which has not been updated for decades. Nowadays, you just change it if it doesn’t look good.
Take Citigroup's B-58 as an example. It served for 60 years and was retired in 1965. This is not a cat or a dog, but a supersonic nuclear bomber equipped with Citigroup's strategic air force. It has auxiliary fuel tanks. The master who can fly Mach 2 spent a lot of money to make it, and it can be replaced at the same time.
Gao Zhendong smiled and said: "Sorry, sorry, I can't help myself, haha."
Throwing the pot on the head of the Work Prevention Committee, Gao Zhendong sat down with a smile.
The Institute also knew that the chief engineer made a joke and handed over the plan. Everyone was almost here and work could start.
Comrades from the Guidance and Research Institute spent some time to introduce the missile body plan of the Thunder-1. The general layout is similar to that of the Thunder-1, but on this basis, four additional The gas rudder greatly improves the maneuverability of the active segment. The maneuvering overload of the active segment is as high as 30G or more, which is different from the 60G of the future R-73 that Gao Zhendong knows, but this is not a bad thing. The R-73 is specialized. , there is a price.
And it doesn’t need to be so big at this time. Compared with the 10 G commonly used in missiles of the Thunderbolt-1 generation, 30G is still much better.
But this is not without cost. The Thunder-1 missile body is slender. In order to withstand this overload, the missile body has been strengthened, which adds a lot of weight. Moreover, under the same diameter, the missile body is strengthened. The charge size was reduced, further affecting the range.
As for the aerodynamic rudder surface, the Thunderbolt-1 plan is still used. Generally speaking, the plan is relatively conservative, or in other words, it is more cautious when changing the original design.
This is understandable. Under limited conditions, being prudent is a good strategy.
Gao Zhendong was listening and thinking. When the comrades from the Institute of Guidance and Research had almost finished their introduction, the chief engineer asked Gao Zhendong: "Chief engineer Gao, what do you think of this plan?"
There have been many exchanges within the Institute, and today’s meeting is basically just for Gao Zhendong.
Gao Zhendong said: "I have a few small ideas, which may not necessarily be mature. Let's discuss them."
Everyone looked at him. Generally speaking, people who say this are considered mature or immature, but their ideas are actually quite big.
"The cost of reinforcing the missile body is a bit high. I wonder if it should be appropriately thickened, from about 0.12 meters to about 0.15-0.16 meters. This has several advantages. First, the increase in area is exponential. , for the same charge, the proportion of shortening in length is greater than the proportion of increase in diameter. The slender one is less able to withstand stress, while the short and thick one is much more resistant to overload, and then the wire trough on the outside of the projectile is used as an auxiliary. Strengthen the structure so that the balance between bomb weight and large overload can be better achieved.”
The comrades from the Institute of Guidance and Research were listening, calculating and discussing.
"Hey, this seems to be a good idea. I did the math, so the structural weight gain will not be so great."
"Use wire troughs to assist in strengthening, kill two birds with one stone!" Springtail There is a gas rudder at the nozzle, and you must take the control line from the guidance cabin.
"However, this will increase the air resistance, which will still have an impact on the range."
"Although it will increase the air resistance, it will also increase the lift of the projectile. Overall, it should be okay."
< br> "If it really doesn't work, just install more fuel. The extra weight of the fighter will have no impact on the fighter. The key is that the range of the missile itself must be sufficient." For fighter jets with air superiority mounts, the main limitation on the mount capacity is the number of pylons and aerodynamic changes, weight is generally not an issue.
"You're right, this seeker can see farther. If you just increase the overload without increasing the range, it seems like you have only done half the job."
"Bullet diameter Enlarging it can also increase the diameter of the optical system, which is also beneficial to improving the performance of the seeker.”
"Don't tell me, Mr. Gao's choice of bullet diameter is very interesting. I just calculated that 0.15-0.16 is a number that is well balanced between bullet weight, range, strength and bullet diameter." Bold This is not a random addition. Caliber is justice, which does not apply to blank ammunition.
Everyone admired Gao Zhendong for casually telling a good bullet diameter balance point. Before he came, he didn’t know that there was room for improvement in the bullet diameter and that it could be so short. Producing this very balanced data within a time period shows that his basic skills are extremely solid, to a ridiculous degree.
Gao Zhendong: What, copied, R-73 bullet diameter 0.17.
As for the length, the comrades from the Guidance and Research Institute can naturally match it well.
The chief engineer listened to everyone's discussion, weighed and calculated it himself for a long time, and applauded: "Well, this idea is okay. Let's go back and deepen it, and use it as the first choice to tackle the problem. The original one was used as an alternative."
As for Gao Zhendong, if you want to change it, make a big change, at least to reach the basic or average level of the third generation infrared combat air-to-air ammunition. What is the meaning of changing the entire second and a half generation?
There is already a second-generation Thunderbolt-1 at the bottom. Even if you take a step forward, you are not afraid of getting involved. Lao Maozi and Citigroup are still using first-generation bombs. But that’s not necessarily the case. After Lao Maozi exchanged infrared air-to-air missile technology with us, it is estimated that the second-generation missile will be released soon.
After the chief engineer finished speaking, he turned to look at Gao Zhendong happily: "Mr. Gao, continue, continue, do you have any other good ideas?"
It is a rare occasion for deputy chief engineer Gao to come here. This meeting must be held well enough.
Gao Zhendong looked at the key points in the notebook he just wrote and continued: "As for the aerodynamic rudder, my suggestion is to reduce the wingspan of the tail."
Reduce the wingspan? why is that?
Seeing that everyone was a little confused about what he was thinking, Gao Zhendong explained: "It's like this. The missile body is thickened and the lift is increased. The original tail can be reduced, and by the way it can also Reducing resistance, this is one of them. "
This is easier to understand. When everyone hears it, yes, yes, yes, if a certain parameter is added over there, it can be reduced here. Mr. Gao said this. A set of small combos.
But since there is one, there are two or even three, and everyone is very curious.
"Second, the current tail is used under low overload. When the overload rises to a certain level, the tail is a bit too stable, which is detrimental to maneuverability. The original gyroscopic rudder on the tail has a little torque at this time. If it is too large, the movement trend of the missile will be stuck. Reducing the wingspan and reducing this moment will be good for maneuverability. "
The tail gyro rudder is a passive stabilization method, once the parameters are determined. After that, you can't control its behavior. You want it, it's there, and when you don't want it, hey, it's still there.
This method has completely disappeared in the era of high-mobility infrared air-to-air bombs. As long as it has no impact on mobility, this low-cost and simple-structure method will not be abandoned.
But Gao Zhendong cannot give up this thing completely now. If he gives up completely, the stability of the missile will have to rely on active control methods, which is a bit out of line in this era,
R-73 The 60G maneuverability is achieved by five control channels, two gas rudder channels, two air rudder channels, and one aileron channel. It is very complicated. Considering the current environmental conditions, a computer must be considered.
If we talk about the bullet diameter of 0.15 meters, we can still put the DJS-60D into it if we think of a way, but the price of the DJS-60D is probably going to make anyone feel sick. This is nothing like using gold to make an energy-containing armor-piercing shield. the difference.
So Gao Zhendong’s choice is to reduce the wingspan. At least it will be less difficult for the control system to resist the stabilizing moment, and the maneuverability will be better.
Comrades just remembered that this problem still exists. In this case, combined with the degree of strengthening of the missile body, can we consider further strengthening the mobile overload?
"Commander Gao, can we consider giving up the gyro rudder completely and rely on the rotation of the active aerodynamic rudder surface to control the stability of the missile."
They all know that Gao Zhendong's automatic control is He is very powerful. He can take classes at Beijing University of Technology, and he also takes "Principles of Automatic Control". You are right to ask him this kind of question.
Gao Zhendong frowned: "Theoretically it is possible, but there is a problem. The active aerodynamic rudder is responsible for both rolling and steering of the missile. At this stage, with the control system we have, there is no The digital control system is a bit difficult. The DJS-60D is a bit too expensive. "
At this time, we were still in an era when warships were far more expensive than aircraft, so anti-ship missiles were equipped with computers, and air-to-air missiles were equipped with this. Toy, that's too much.
The chief engineer nodded: "What Mr. Gao said is indeed a problem. It needs to be considered in depth, calculated in detail, and to grasp the balance between stability and maneuverability."
Seeing that everyone is a little reluctant As if, Gao Zhendong still came up with an immature idea of his.
“If we must cancel the gyro rudder and use active rudders to control the stability of the missile, it is not impossible, but this idea is not very mature and requires a lot of energy and cost before it can finally be implemented. .”
When everyone heard this, they became excited again. It would be great if there was a way. Even if it cannot be realized for the time being, it cannot be realized on this bomb, but maybe it will be possible in the future.
(End of this chapter)