Of course, movies are movies, and reality is reality.

What people see now is probably related to super fuel metal hydrogen.

The reason why ordinary rockets are so large and have very few useful loads is because they require a lot of space to load "inefficient fuel".

The large diameter is not easy to do, so it will be built long, so nowadays the rockets are thin and long, and they are like bamboo poles when standing up.

Now practical technology can make large diameters of 20 meters, but metal hydrogen fuel is efficient and can work with only a few uses, so it looks very solid.

The reason why the "second-class" spacecraft is longer than the booster is that there is a large space load inside the spacecraft.

People speculate that its capacity must be very strong, and it must be stronger than the two or three hundred tons of the starship.

However, it is not actually the largest rocket in human history.

A long time ago, it was the Free Federation, and it designed a real super rocket - Sea Dragon!

In terms of height, it is taller than the starship rocket that is nearly 120 meters, not comparable to the 80-meter practical technology new rocket, because it is as high as 150 meters.

In terms of diameter, the 20-meter diameter of the new rocket of practical technology is not enough, and the 9-meter diameter of the Starship Rocket is even more invisible because its diameter reaches an astonishing 23 meters!

The Sea Dragon Rocket's capacity has reached an astonishing 566 kilometers of circular orbit, which is about 4 times that of the Saturn V super heavy rocket and twice that of the Super Rocket Starship.

However, as a traditional rocket, it has huge carrying capacity and huge take-off weight, so the Sea Dragon Rocket with a take-off weight of about 18,000 tons has become the super rocket with the largest mass and capacity among all rockets with complete design and demonstration to this day.

The super weight of 18,000 tons after fueling cannot even be allowed to stand upright on land, so it must be built horizontally by a shipyard like a submarine.

The huge propellant storage tank inside it can provide buoyancy for the rocket, allowing it to float on the water and be dragged by the tugboat to the launch site, which is a calm sea area.

Its first-stage engine nozzle is equipped with an extra-large ballast water tank, which can stand up in the sea water after being filled with water.

The first stage of the Sea Dragon Rocket ignites directly in the sea. After shaking a bunch of marine creatures, the first stage of the Rocket will send the second stage out of the water. Then the four small engines on the outer wall of the second stage rocket ignite the rocket to stabilize the rocket's vertical rise until the entire arrow body breaks out of the water.

This is also the reason why it is called "Sea Dragon".

Although it is so huge and looks bulky, it is actually compared to Saturn V that is thrown away after use, it also has a recyclable system with inflatable airbags to slow down.

The first-stage rocket uses a spherical fuel storage tank, which can be embedded in the second-stage engine nozzle to save space. After leaving the second-stage arrow body, it will open the inflatable airbag to slow down.

Its second-stage rocket engine actually does not have a dedicated nozzle. After the first-stage rocket leaves, the "arrow body" that wraps the first-stage rocket is the nozzle.

The arrow body expands outward and expands into a trumpet, which is the engine nozzle.

When the second-stage rocket is ejected, it will use the blunt-head design commonly used in manned return capsules to resist the heat when reentering the atmosphere. After reentering the atmosphere, open the inflatable airbag to slow down.

The recovery of the first-stage rocket and the second-stage rocket were splashed into the sea water, and then dragged back to the rocket factory for repair and finally reused.

At that time, its design team believed that significantly increasing the rocket payload was just the icing on the cake, and the reuse of rocket bodies was the most important factor in reducing launch costs.

From the current perspective, this idea is very correct.

By the way, Hailong also has another way to reduce costs, that is, it does not need to build a special launch tower, because it cannot stand up even after it is built. It can save this part of the money by launching directly in the sea.

but……

Although the Sea Dragon Rocket is so powerful, I think it is so advanced, but in fact it is the real stupid big black and thick black one, and it is sure that it can be made with the technology at that time.

After refueling, its weight will reach 18,000 tons, but its first-stage rocket is not thrust built with multiple engines, it only uses one engine.

Therefore, the characteristic of the Sea Dragon Rocket is that the engine nozzle is larger than the fuel tank and is very huge.

This engine saves almost all considerations about the word "efficiency". It simply increases the thrust by "quantity stacking" so that the first-stage single engine of the Sea Dragon Rocket has nearly 36,000 tons!

The second-level single engine thrust also reached 6400 tons!

It's simply crazy!

Therefore, humanity's pursuit of huge wonders is endless.
Chapter completed!