A huge tiger roar came from the mountain before. They were so worried because they heard the tiger roar. Unexpectedly, the owner of the tiger roar was standing in front of them now, and the figure of this hill was too large.
Is it scary?
“It, it…”
Han Qingsong didn't know what to say to express his shock for a moment. He was not only shocked by the figure of this tiger, but also shocked by the ability of this tiger to change its body at will. He was like a monster in a fairy tale drama.
This shocked him more than the end of the world!
"It's not a monster!"
Su Leyan still doesn’t know what they are thinking, but although Zhan Hu can change his body, he is not a monster. However, if he continues to evolve, who knows if there will be surprises in the future!
"But?"
Han Qingsong was shocked. If it weren't for the monster, how could he change his body?
"Zombies and psychics have appeared. What's the fuss about mutant beasts? They just have some abilities. Japan comes to the end of the world and will be a biological evolution. There will be more things like this in the future!"
They couldn't help swallowing, looked at Zhan Hu in front of them, and then looked at the calm Miss Su in front of them. They couldn't help but think that Miss Su is really a capable person!
Feeling the fear in their hearts, a hint of pride flashed through Zhan Hu's eyes, his figure shrank, and he turned back to the cute little tiger, jumped into Su Leyan's arms, rubbed her hand intimately, and looked smelly.
The appearance of the fart was even more shocked to everyone present.
It is said that after the founding of the People's Republic of China, it is now the end of the world. I am afraid that all the monsters in the world will become monsters, so what kind of world is this?
"Miss Su, the leader is calling!"
"What's wrong?"
She knew that the helicopter flying to Guangyun Mountain yesterday encountered the attack of birds, so she crashed directly, and none of the people sent to rescue were spared. Could it be that something went wrong today?
Han Qingsong's face was solemn, "Those birds seem to be organized attack helicopters. The leader said we were waiting for a day or two!"
Su Leyan thought for a while and asked, "Do you have all the helicopters in the military research field?"
Han Qingsong was stunned by the question, then nodded hesitantly and explained, "The Military Research Institute does have a helicopter, but that helicopter was independently developed by the Military Research Institute and has been initially formed and seems to have not been completed yet.
, Before the end of the world came, the helicopter was kept in warehouse No. 10 of the Military Research Institute!"
"It's not finished yet, it shouldn't be possible!"
He could drive a helicopter, but that helicopter had not been completed yet, which was not a joke.
Su Leyan thought for a while and said, "Take me over and have a look!"
The birds' organized attacks must be controlled by strange beasts or spiritual zombies. Instead of letting them take risks, it is better to save yourself, after all, do your own things and have enough food and clothing!
Han Qingsong hesitated for a while and nodded in agreement. Although he didn't think that Su Leyan could complete the remaining research on the helicopter, it was not impossible for Miss Su to give it a try!
"Gao Jianwei!"
"arrive!"
"I will take Miss Su to Warehouse No. 10. Protect Professor Yang and the others in the laboratory and tell them that Miss Su is back, don't worry!"
"yes!"
Han Qingsong did not take Su Leyan to Warehouse No. 10 before because the helicopter was too large. No matter how large the space hub was, it was impossible to install a helicopter. Besides, it was a helicopter that had not yet been successfully developed.
Seeing the helicopter, Su Leyan smiled. I don’t know if it was a coincidence, but it was actually a transportation helicopter. Judging from the appearance, the space is quite large, so it can be modified properly.
"Miss Su?"
Su Leyan nodded and clapped his hands, "Call Chief Zhang and tell him not to send people here. This helicopter will be modified and there will be no problem loading more than 200 people!"
"?"
Han Qingsong looked shocked. Generally, transportation helicopters loaded up to more than 100 people, and the most important thing was the helicopter that could fly.
This helicopter has been under research, not to mention that it has never been tested. Ms. Su said that modifications can bring all of them back. It’s not that he doesn’t believe it, but it’s really unlikely!
"Ms. Su, this helicopter is a new type of transport aircraft recently studied by the Military Research Institute. It has not been successful yet, and it lacks some parts, and the most core position has not been assembled..."
Looking at Han Qingsong who was reluctant to speak, how could she not understand Han Qingsong's concerns? But this matter was simply a slight connotation for her. There were so many instruments and many parts in the warehouse, so there was no problem in assembly.
Besides, this helicopter is already a semi-finished product. If it cannot be completed, she can return it to the furnace and rebuild it!
"I can move anything in it, right?"
Han Qingsong was stunned. He said it for a long time. Is Miss Su really planning to do it by herself?
Is he blocking or?
However, looking at Miss Su who has already started to do it, Han Qingsong said you can do whatever you want!
"Can!"
The key to a helicopter is the rotor. The rotor is in relative motion with the air, so that the stationary helicopter can also generate sufficient aerodynamic lift to achieve the ability of vertical takeoff and landing.
However, while the rotor cuts the air during rotation to generate lift, it also produces countertorque force on the fuselage. If it is not curbed, the helicopter will spin in the air and cannot fly normally.
Conventional helicopters use tail rotors to counter torque of the racebore. The problem is that the power consumed by the tail rotor and the drag brought by the tail rotor have no effect on propulsion and lift, and are purely to maintain flight stability.
The size of the tail rotor should not be too large, otherwise it will easily touch the ground, or be hung with wires, branches or other obstacles. Small tail rotors can only increase the speed to provide sufficient reverse torque, becoming an important source of helicopter noise.
The faster the helicopter speed or the larger the takeoff weight, the more prominent the tail rotor problem.
The two pairs of rotors with coaxial inversion can cancel the countertorque force between each other, but the sleeve shaft is not only mechanically complex, bringing a series of design, manufacturing and reliability problems, but also need to leave enough spacing between the upper and lower rotors to avoid
The elastic rotors collide with each other, but this not only causes the lift loss of the rotor, but also increases the wind resistance. Arrange a pair of reverse rotors at both ends of the wings like carrying a shoulder pole, which can also achieve the purpose of eliminating the countertorque torque.
Rotors that are far apart are a challenge to roll stability, and are prone to instability when the ground effect is uneven or when there is strong crosswind.
Apart from these, the most important thing is the engine.
All the things that should be dismantled were almost done. After reading it, she finally understood why the helicopter had not been successfully developed and her feelings were stuck in the engine.
Entering the 21st century, aviation engines are further accelerating their development, which will bring new major changes to the field of human aviation.