Venus's atmosphere is special, mainly composed of carbon dioxide and nitrogen, the air pressure and mass reach about 93 times that of the Earth, and the huge pressure causes carbon dioxide to be compressed into a supercritical fluid, forming an alternative ocean.

At an altitude of 50 to 65 kilometers in Venus's atmosphere, the atmosphere is mainly composed of about 21% oxygen and 78% nitrogen, which is almost the same as the Earth's atmosphere and allows humans to breathe directly.

Coupled with the superfluid carbon dioxide below this height, it is theoretically possible to make the building "float" and build a special configuration of the colony.

Therefore, in the eyes of scientists, Venus is no less feasible to colonize than Mars, in addition to being often accompanied by 12-level strong winds and sulfuric acid corrosion, and the alliance will send 16 Venus probes in a row in the last century, of which 10 have completed soft landings.

Xiao Okada believes that the key research target of Venus is the atmosphere with a thickness of 15KM that can be breathed by humans, so the probe entering Venus is not an ordinary lander, but must have a certain floating detection ability, and even achieve flight, and it is best to be able to sample back.

This requires a reliable liquid engine at room temperature that can preserve fuel for long periods of time in harsh environments, i.e., high-performance "poison engines".

As we all know, Seryov hates poisonous hair in the end, so the development of the C series was handed over to Guo Shen to set aside a piece of land separately to develop a powerful engine that can start many times in the perverted atmosphere of Venus, support the probe to fly around, and best send back a lot of samples.

Actually, NAPE can also do, but that is too expensive, and one engine is more than the total budget for Venus exploration......

The Venus exploration project is ready to be launched in April, and the focus is that the probes in the atmosphere are very high-end and complex, and the human information about the target is still very limited, and the design standards are too vague to increase redundancy as much as possible, and it is not cost-effective to just work for dozens of minutes like a coalition.

And the Venus exploration window is also very rare, there is only one in 584, that is, almost 20 months, and April almost caught the tail of this year's window, and it will be very troublesome if it is late.

Xiao Okada is mainly responsible for this project, and Seryov's current energy is mainly on the new Tengyun project.

Five months ago, Seryov told the Aviation Development Commission that it would take one year to solve the power problem of the Tengyun project, that is, the mass production plan of the "Lushan" engine.

In fact, Seryov has put a lot of effort into this cheap orbit scheme, and among all the current manned spacecraft, Tengyun is the cheapest, which is almost the ultimate in cost and performance of SSTO under current technology.

Now, the TP-25, the heart of the Tengyun project, has completed the production version of the prototype.

The mass of a single engine is 1450 kg, and after ten units are connected in parallel, the mass can be reduced by another 400 kg through some oil pipelines, and the peak thrust of 257 tons can be output in the state of air tip.

For rocket engines, this weight and thrust is a mess of industrial garbage that can't be worse, and a college student who has just graduated from aerospace is stronger than it, but when you see their amazing specific impulse and the mode that most of them can still be used for working in the atmosphere, you can only sigh at the imagination of the designer who breaks through the boundaries and the arrogant confidence of the maker.

And just more than a thousand kilometers away, the engine, which will cause a huge earthquake in the aerospace industry after it is exposed, is electrifying and heating the car.

……

Desert base.

A black, truck-sized triangular aircraft is docked at the end of the runway, and ground support ground trucks are working, providing power and fuel cooling.

Dou Ping stood not far away and counted the projects of the base with his fingers:

"Shenlong, Xuehu, rapid launch system, heh, this is another Wuxian 20, our base has never tried to carry out so many projects at the same time."

"Director Dou, has the project been approved for 20 years without investigation?"

Next to him, Anderov, who had been a little tanned and a little tanned, squinted around the base, as if he had blended in.

The reason Anderov is here is that the desert base has encountered difficulties in the development of the Snowbird's airframe, and although the aerodynamic shape is designed to meet the expected speed requirements, it poses a lot of problems for the equipment placement and fuel storage inside the airframe.

As an important defense contractor, Xinyuan sent Anderov, who has the most experience in aerodynamics, and the latter has the blessing of the Systems Research Institute to show his might in the base, and has become the "Chief Security Division" admired by everyone.

Dou Ping: "I haven't approved the project yet, but I estimate that the Air Force will definitely want it, and this does not conflict with other projects." ”

Well, the triangular unmanned aerial vehicle on the runway is an unmanned verification aircraft made by the base in order to verify the TP25, and the fuselage is improved from the Wuzhen 8, but the whole has been overhauled, and the cross-section looks like an ellipse with the upper part cut off, which is obviously a central lift body configuration.

It is powered by a TP-25, which can output 7 to 11 tons of thrust in the jet state, has a maximum take-off mass of 18 tons, and is positioned as a front-line strategic reconnaissance aircraft.

According to the calculations of the base, after entering the 180KM low-earth orbit, the Wuzhen 20 can still have about 4 tons of mass left, which can provide about 20 hours of low-orbit reconnaissance time, and then it will have to re-enter and return because the speed is reduced by atmospheric friction.

Since it can be put into orbit, it means that the range is meaningless, and if the Wuzhan 20 does not choose to return but accelerates slightly with the last fuel, it will get a precision-guided warhead that can reach a speed of Mach 30.

Although there is no hydrogen bomb as a warhead, the power of kinetic energy alone is amazing enough, especially for large targets (large ships) that move slowly (everything on the ground is slow for the Wuzhan 20), and the Wuzhan 20 can temporarily lose its combat effectiveness even if it does not hit the edges.

More importantly, compared with missiles, the cost of the Wuzhan 20's fuselage is very cheap, and it is more convenient to launch than a temporary low-orbit reconnaissance satellite, and its survivability is also better.

After all, even if the TP-25 is working at full strength, it is far less easy to detect than the tail flame of a small solid rocket, and it is more flexible, and it can be launched from any small airfield.

This was originally an experimental project to test the TP-25's high-altitude working environment, but the desert base was keenly aware of the huge potential in it, and Dou Ping directly gave it the title of "Wuzhen 20", and it was almost certain that the military would not give up on this project to continue.

The only problem is that the Wuzhen 20 is limited by the size and weight of the aircraft, and the container for storing liquid methane and liquid oxygen is not perfect, and it must be cooled by a powered car and covered with insulation cotton when on the ground to prevent the wings from freezing and crashing out of control due to ultra-low temperature fuel.

The ground crew even had to manually hold the heater to de-ice, after all, this weight is not a small number for the Wuzhen 20, and most of its weight is given to fuel.

Only after take-off can the engine provide enough power to the body, so to some extent, the Wuzhen 20 is still a noble lady......

(End of chapter)