First of all, let's take a look at the cargo spacecraft Tianzhou-2, which is the first flight cargo spacecraft in the key technology verification and construction stage of China Space Station. According to the mission plan before construction, Tianzhou-2 Cargo Flight Innovation Club will carry consumables and rooftop materials of three astronauts, as well as the on-orbit operation and rendezvous and docking of the core cabin, laying a solid foundation for the subsequent flight of the space station.

Tianzhou-2 is the second cargo ship in China. It has a two-cabin configuration and consists of a propulsion cabin and a cargo cabin. Its total length10.6m, maximum takeoff weight13.5t, maximum diameter of 3.35m, material mobility of 6.9t, cargo ratio of 0.5 1, and on-orbit service life of not less than 65,438.

So what is the fuel that Tianzhou-2 gave to the space station?

What kind of fuel does China's space station use? Media reports did not reveal the answer to this question. We can only infer from other information. After consulting a lot of relevant information, I think that the fuel added by China Space Station may be nitrogen tetroxide and unsymmetrical dimethylhydrazine.

The reason is that China's most mature attitude control engines, orbit control engines, shenzhou spaceship and the International Space Station all use this fuel. Another great advantage of this fuel is that it is non-volatile. After all, the International Space Station needs to stay in the universe all the year round. It will be inconvenient if you need to refuel at any time.

Another advantage of using unsymmetrical dimethylhydrazine as fuel is that it will ignite automatically as long as nitrogen tetroxide is added, and there is no need to equip the engine with an igniter. In this way, the stability of the engine will be very good and it is not easy to break down. For example, China's manned space rocket Long March 2F has been launched 12 times without any accident.

However, it should be noted that this kind of fuel is toxic, so you need to be very careful when using it, and you can't touch it at will, otherwise it will poison people.