The transformation of the Hongyan rocket officially began in July.

The first thing that started was the escape system.

This part of Hongyan No. 1 was originally not available, so the design of the escape system, Zhang Xingyang and they could only learn from the design on the long 2F.

The design of the escape system on the long 2F is still relatively conservative, and the design of the top escape tower is adopted.

It consists of three parts, namely the tower, the escape engine and the separation engine.

Among them, the escape engine and the separation engine are both solid rocket engines.

In fact, among the manned rockets that have been put into use and have not been decommissioned, only the "United" spacecraft of the Da Mao family has adopted the design of the escape system.

The escape tower can ensure the safety of astronauts from 15 minutes before takeoff to 120 seconds after takeoff.

During the whole process, once the rocket's fault detection and handling system finds a problem, the separation engine on the escape tower will be immediately activated, allowing the spacecraft's orbital module and return module to separate from the rocket and land in a safe area.

Help the astronauts on the spacecraft out of danger as soon as possible!

"Brother Xingyang, the performance of their solid engine doesn't seem to be very good?"

Geng Bo looked at the separation engine under the escape tower in front of him as he flipped through the performance report in his hand.

For escape towers, the performance of the separating engine is important.

Because when the escape tower is escaping, it separates the entire escape tower from the tip of the rocket by separating the engine.

If the performance of the separating engine is not very good, it is easy to have too little separation distance in the ejection process.

If the launch vehicle explodes at this time, it can easily pose a fatal threat to the astronauts in the escape tower.

For example, if the separation engine can only catapult the escape tower at a distance of less than 1,000 meters after starting, the explosion of the rocket will still cause fatal injury to the astronauts in the escape tower.

Therefore, the performance of the separating engine is a very important indicator for the escape system.

The separation engine on the Long 2F is indeed able to meet the requirements of the escape tower when it is separated.

However, out of more secure considerations, Geng Bo still proposed to Zhang Xingyang to improve the separation solid engine of the escape tower.

"Actually, we don't have to do other modifications, just a little modification of the fuel agent."

At present, the solid fuel agent used on the Chang 2F is hydrogenide-based, and the thrust generated under the same conditions is still smaller than the high-nitrogen anionic salt developed by the previous rocket research institute.

"Although the performance of the high-nitrogen anionic salts we produced before is better, the storage conditions and transportation conditions are more demanding."

"If anything goes wrong during transportation or storage, it will explode violently."

Zhang Xingyang did not agree with the change to the solid fuel agent used to separate the engine.

The manned rocket engine is not like the cargo rocket engine they developed before, and the biggest pursuit is to increase the thrust of the rocket engine as much as possible.

Manned rockets pay more attention to safety issues, and the biggest requirement is to ensure the safety of astronauts in manned rockets.

After all, every astronaut in the Dragon Kingdom is hard-won, and it is impossible for them to sacrifice casually.

Compared with the Dragon Kingdom, Eagle Sauce's current spaceship has reached the other extreme.

None of the spacecraft they used had an escape system, and they thought that the spacecraft they had developed was very safe and did not need to have an escape system.

Ten years ago, the Challenger spacecraft exploded more than a minute after liftoff from the Kennedy Space Center, killing seven astronauts.

At that time, there was no escape system on board the "Challenger", and after the crisis was discovered by the ground command center, they had no way to save the astronauts above.

If they had had a reliable enough escape system at the time, the accident that killed seven astronauts could have been avoided.

"The engine on the escape tower needs to be added to a certain extent, and it must be equipped with a yaw control engine so that it can steer in time after the escape tower is separated."

After Zhang Xingyang looked at the design on the escape tower, he said to Geng Bo.

"The current escape engine cannot be turned at the first time after starting, and there is a certain risk."

Since the escape tower and the launch vehicle are flying along the same orbit after the separation engine is started, and because the rocket propulsion system is still working, the launch vehicle is still in accelerated motion.

In order to prevent the escape tower from colliding with the launch vehicle, it is necessary to install a yaw control engine on the escape tower to deviate from the flight trajectory of the rocket.

"Will this cause a problem with too many engines?"

"The complexity of the entire control system will increase exponentially!"

Although Geng Bo agrees with Zhang Xingyang's consideration from the perspective of security, this is not without drawbacks.

If you add another yaw steering engine, there will be 12 engines of 5 types in the entire escape system!

High-altitude escape engine, high-altitude separation engine on the fairing, escape engine, separation engine, yaw control engine on the escape tower.

Two different escape methods are adopted, namely separation with escape tower and separation without escape tower.

If 120 seconds before the rocket flies, the power for the separation of the escape tower comes from the separation engine on the escape tower; After 120 seconds of flight, the separation power of the rocket in the state of no escape tower comes from the high-altitude separation engine on the fairing.

To be honest, with such a complex escape system, Geng Bo felt his scalp tingle just after thinking about it a little.

He could only mutter silently in his heart, hoping that Qin Ming, who was in charge of the design and development of the control system, would not scold his mother.

Of course, at this time, Qin Ming didn't know what kind of complex system he would face next.

At this time, he was still worried about the fault detection and processing system!

"Even if the difficulty of the control system is the highest, we must ensure the safety of our astronauts!"

"Geng Bo, you should also know how valuable astronauts are!"

Zhang Xingyang's tone was very stern, but what he said was also the truth.

For the fledgling manned space industry, every astronaut is a hard-won treasure!

Geng Bo didn't say anything at this time, but looked at the escape tower in front of him that was almost completely dismantled, and said with some emotion:

"Shenzhou 1, our own manned spacecraft, I really look forward to the day he flies into space!"

The Chinese people's dream of flying into space hundreds of years ago will finally be realized in the hands of our generation.

We stand on the earth, but we have always longed for the starry sky.

(End of chapter)