Military Technology

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In addition, even for the Falcon rocket, after so many years of development, the first-stage rocket body that has been landed and recovered has to undergo some repairs and replace some parts before it can be reused.

This time usually takes half a month to a month, but Haoyu Technology can repeatedly use the launch within ten days. Does this mean that this compound landing recovery technology of parachute and engine is more reliable and advanced?

Then there is the load of this launch, the two launches, one is to launch two communication satellites, and the other is to launch a heavy-duty experimental satellite.

The weight of a single communication satellite has reached more than one ton, and the weight of that heavy satellite has not been announced to the public, but it is reported that the weight of this satellite has reached six tons. This also means that the thrust of the Jianmu-2 rocket has been greatly increased.

Even the one used this time should not be the original Jianmu-2 recoverable rocket, it should be an improved model Jianmu-2! Retrievable launch vehicle.

However, this news has not been confirmed by Haoyu Aerospace and Haoyu Technology. However, many people still find a lot of differences when comparing the rocket body in the launch video and the recovery video, so they firmly believe this statement.

If only this is the case, it is not enough to attract so many people's attention.

During these two launches, Haoyu Aerospace also conducted a recovery test of the rocket fairing.

You must know that currently only the Falcon rocket is conducting research experiments on fairing recovery, and has achieved good results.

However, the fairing recovery technology of the Falcon rocket is not successful every time. Often, only half of the fairing is recovered, and the other half of the fairing falls into the sea and cannot be recovered.

But this time, the two rocket launch missions of Haoyu Technology have carried out the recovery test of the fairing.

In the first recovery test, after the two halves of the fairing fell, only half was successfully recovered, and the other half fell into the vast desert and was severely damaged.

As for the second recovery test, the two halves of the fairing were all successfully recovered. Such a high success rate has caused the entire industry to boil.

In the same way as the recovery method of the rocket fairing of the Falcon rocket, after the two halves of the fairing of Jianmu-2 fall off and separate, they will also slide down to the predetermined area, and will also throw a paraglider to slow down and control the direction of the slide. .

But the difference is that when the Falcon rocket landed at the end, the unmanned boat below supported a large net to catch the landing fairing.

This is like precise docking. The landing point and speed of the fairing must be controlled, and the speed of the unmanned boat must also be controlled so that the fairing and the unmanned boat can successfully dock.

As for the fairing of the Jianmu-2 rocket, there is no such unmanned boat, and there is no mobile receiving platform.

Wu Hao and the others adopted another more concise and convenient recycling method.

Directly in the process of the fairing sliding down in the air, a helicopter is used for recovery.

To put it simply, the helicopter must first hover over the edge of the area where the rocket fairing is about to slide down and wait for it.

After finding the fairing, the helicopter flew over quickly, and then hung the paraglider above the fairing through the hook rope hoisted under the helicopter, thereby hanging the entire fairing.

Then there is a helicopter to transfer the fairing to the predetermined place and put it down, so that the recovery is successful.

Unlike the rocket body, although the fairing is relatively large, it is light enough. It is also because it is light enough that it has laid the foundation for the use of helicopter aerial capture, hoisting and recovery technology.

The fairing is located at the top of the rocket to protect the rocket load from harmful environments such as aerodynamic force, aerodynamic heating, and acoustic vibration.

After reaching a sufficient height, usually after the booster and the first-stage rocket body fall off, the fairing will fall off automatically after flying for a period of time.

This also requires the fairing to come out strong,

It must be light enough, because every gram of weight on the rocket will affect the final carrying capacity of the rocket.

So don't look at it as just a protective shell, but it is actually very difficult and demanding to manufacture, which also makes it more expensive.

The fairing price of the Falcon rocket is about one million US dollars, and half of it is about half a million US dollars.

The manufacturing price of the two halves of the fairing of Jianmu-2 and the price of raw materials add up to about one million yuan. Although it is far less than the price of the fairing of the Falcon rocket, it is also very expensive.

And if this recycling technology can be successful, the two halves of the fairing can save them one million yuan in cost, which is very cost-effective.

Moreover, this recovery method is far simpler and more reliable than the Falcon rocket fairing recovery method, and the cost is cheaper.

And this news made the entire aerospace technology field lively. Many rocket payload transportation experts affirmed and highly evaluated this fairing recovery technology.

On the other hand, bolder ideas have also been proposed.

For example, some experts put forward such a concept or thought suggestion. Since the fairing can be recycled in this way, can the rocket's first-stage rocket body and second-stage rocket body also be recycled in this way.

You must know that the current recovery technology of both the Falcon rocket and the Jianmu-2 rocket uses rocket engines to decelerate.

This method has higher technical requirements for the rocket, and the cost will naturally be higher. But if the recovery of these rocket bodies is carried out by helicopters in the air, the difficulty of rocket technology and the cost of recovery will be greatly reduced.

Anyway, after the rocket is launched and then separated, the fuel in the rocket body will basically be exhausted, so the weight of the empty rocket body is not too heavy.

It should not be a problem to use a parachute to slow down, and then use a heavy-duty helicopter to capture and transport in the air.

And if one heavy-duty helicopter is not enough, multiple heavy-duty helicopters can be used to capture and transport them together.

Experts even proposed to use multiple helicopters to pull up a net in the air, and then use this net to catch the first and second stage fairings of the landing rocket.

In this way, 90% of the rocket body can be partially recycled, which will greatly reduce the launch and transportation costs of the launch vehicle and lay a solid foundation for the large-scale use of space by humans.

Since the first and second stages of the rocket body and the first-stage fairing have been recovered, why is it only 90% instead of all of them.

Generally, inside the fairing of the rocket, there is actually a first-level transportation device. This level of device is generally called the upper stage, which is used to transport satellites to change orbits and send satellites to precise orbits.

In addition, when launching some high-orbit satellites and spacecraft, it will also be used on the upper stage.

Once this upper stage is used, it will fall into the atmosphere and burn up, which is basically non-recyclable.

However, the cost of the upper stage generally only accounts for a small part of the cost of the entire rocket, so there is not much recovery value. Moreover, to pass through the entire atmosphere, it is very difficult to recycle, and the cost is also very high, so there is no need to recycle. Even before Wu Hao's new recycling technology, almost all secondary rocket bodies were not recyclable.