The inside of the cockpit is a little better than the outside, but it is only a little better, the cockpit is a second-hand sedan on the seat, but it looks a little simpler and a little stronger, and there is no beautification in the cabin.

The aircraft piloting system should be the place with the highest 'technology content', because it is necessary to control a large guy that reaches three tons after being loaded with water, so the hydraulic power assist system is used on the two rudders and one handle.

Otherwise, the rudder surface and vertical tail of the three unusually large planes behind the plane may not be controlled by people.

In addition, there is a throttle control handle on the right side of the driver's seat, so that the controller that controls the entire flight has four mechanical control tools: left and right rudders, a handle to control the pitch attitude, and a throttle handle.

However, compared with the ultralight aircraft made by Chen Wei himself, there are indeed several more instruments in front of this aircraft, such as fuel gauge, altimeter, airspeed gauge, engine tachometer, fuselage water tank water meter, hydraulic booster pressure gauge.

In addition, there seems to be an antenna on the cockpit, and there seems to be a socket in the cockpit, which seems to have communication and navigation capabilities, or some other wireless connection method.

And, there are a couple of little buttons on top of the control table, and it seems like this is the control switch for something.

"This is a headlight controller that has not been installed on the plane, and it may be used when it rains in the future, or it may be used for take-off and landing before dark and dawn, I don't know if you want to install a hernia headlight or another lamp, so I didn't install it.

There are also flight warning lights that are pre-set on both sides of the wings, and if one day the plane is actually allowed to fly high, these things can ensure that it will not be hit by other aircraft! ”

Chen Wei saw Yun Yi's puzzled look, so he explained.

"Let's go inside the fuselage and take a look, there is currently a large water tank installed according to your requirements, which can carry at least one and a half tons of water at a time. It's all up to two tons! ”

With Chen Wei's words, the two walked from a small door in the cockpit to the cabin at the back.

There is a large water tank here, but it is not very high, the height of the cabin is about one meter nine, and the water tank is only one meter two high, according to Chen Wei This is to prevent the water tank from being too high to affect the balance of the aircraft, in addition to the fuselage is long enough, from front to back is as much as 18 meters, even if the length of the cabin here is only nine meters, it is enough for this tank to be filled with one and a half tons of water or more.

On the wall of the wooden planks separating the nacelle from the cockpit in front of the tank. There are several meters and controllers, which according to Chen Wei are used to control the water in the tank, and the water is evenly delivered to the water sprayers on both sides of the wing through a small supercharged engine under the tank.

"Well, I think this plane is well made, Brother Chen, you have worked hard!"

After reading all this, although he felt that all this was simple to the extreme, Yun Yi still felt very satisfied, and was about to return to the cockpit and then go out, but Chen Wei pointed to the door on the fuselage. Said:

"You don't have to get down from the front, in order to facilitate the usual loading, this one on the fuselage is bigger than the door in front of the cockpit!"

Seeing this door, Yun Yi suddenly said a little strangely:

"Brother Chen. Since there is a door in the back cabin, the front cockpit is not used, I think they even use the general household loosesheet, and the sealing is very poor and poor. Wouldn't it be cold if it was winter? ”

"That's not good, the door at the back is for loading and entering and exiting, and the door in the front cockpit is mainly for the convenience of parachuting!"

Chen Wei shook his head. Seeing that Yunyi was stunned for a moment, he patiently explained:

"You think, if something goes wrong with this plane in flight, it will crash, there are several people on the plane, and people other than the pilot can parachute out of the cabin door, but the pilot can't, and the plane doesn't have autopilot, and it will fall off immediately after leaving the pilot, so I designed the door of this cabin.

If something really goes wrong, after the person behind parachutes, the pilot can kick open the door and escape immediately with a parachute bag on his back, so he doesn't have to risk the plane losing control to the back door! ”

After listening to Chen Wei's strong explanation, Yun Yi's head was suddenly covered with sweat: Ya's feelings are designed for this, and it seems that this plane is really not too safe.

"You kid don't have to be so afraid, I don't dare to say anything else about this plane I built, as long as you carefully check the rudder control wire rope and the engine before taking off, it can't have an accident anyway."

Don't look at it simple, but it's much safer than those Boeing and Airbus, that kind of plane falls on ten planes and eight pilots, and I can't drop one plane! ”

Chen Wei saw Yunyi's head in a cold sweat, and immediately patted his chest and said proudly.

Yun Yi rolled his eyes in his heart, but he also admitted that Chen Wei was right, in today's era of science and technology, the simpler the plane is built, the less likely it will be to fail.

After coming out of the cabin, Yun Yi noticed that the plane was eighteen meters long, but the cabin was only about nine meters, and the rest from the fuselage to the tail was only an extension made of three high-strength aluminum alloy plates connected to the tail, and there were several wire ropes that controlled the rudder surface and the tail hanging tail, and other than that, there was nothing in this section.

"Because agricultural planes don't need to fly at high speeds, they need to have a good level of low-altitude and low-speed control, so in order to make the aircraft have enough lift, I designed the wing length to be 26 meters long and 2 meters wide, so that the wing lift is large enough, even if it is only 60 or 70 kilometers of speed, the plane can fly.

However, with such a wide wing, the fuselage must be about twenty-six meters according to the normal layout; It's just that in this way, the weight of the aircraft will be very large, and in order to have enough lift, it is necessary to be very fast, otherwise it will easily cause the aircraft to stall and lose control, and the requirements for the engine are also very large.

So I broke the conventional layout and went with this short fuselage; It's just that the weight of such a short fuselage is also very large, so in order to completely reduce the weight, I only made a nine-meter cabin after calculation, and the remaining nine meters are supported by an aluminum alloy keel to support the tail! ”

Chen Wei said, pointing to the keel of the fuselage, and then pointing to the huge vertical tail and two rudder surfaces on the tail of the aircraft, which are far beyond the ordinary aircraft, and said with a smile:

"Because the wings are too wide and the fuselage is too short, the stability and longitudinal maneuverability of the aircraft will be low, and the low-speed rudder surface control ability of the aircraft will also be poor.

So to solve this problem, I used a huge vertical tail and two huge rudder surfaces, so that even when the speed of the aircraft is taxiing on the ground, the speed is only 30 kilometers, this huge vertical tail can control the left and right directions, and the two rudder faces can also make the tail lift, or slightly increase the speed to let the nose occasionally lift! ”

Although Yun Yi doesn't know much about aerodynamics, but the basic common sense is to understand, looking at the wide wings, the short fuselage, and the vertical tail and rudder surface that look very abrupt and weird, Yun Yi not only looked at Chen Wei with admiration:

"Brother Chen, I really admire you so much, I can imagine such a genius design, although it looks very incongruous, but it is very reasonable when you calculate carefully, you are really a genius in mechanics!"

Yun Yi's sincere praise made Chen Wei's sun-tanned face full of happy smiles, patted Yun Yi on the shoulder and grinned:

"Hey, brother, you want to use an airplane, can I still help you design it seriously, if you still want to build an airplane in the future, Brother Chen, I will do my best to build the most cost-effective plane for you!"

There is an old saying in China, called 'a mule is a horse, pull it out and slip it', after Yun Yi saw the static shape of the plane, Chen Wei began to prepare for the test flight.

"The oil circuit inspection is normal, the oil pipe is intact, the fuel tank booster is working normally, the power supply battery of the booster is sufficient, and the self-provided wind turbine is normal!"

"The wings are normal and there are no cracks, the tripod is intact and there are no broken lines, and the wire rope is intact!"

"The tail hangs normally, the rudder surface is normal without cracks, and the wire control rope is normal!"

Chen Wei sat in the driver's seat, Yun Yi sat side by side in the back, and after listening to the sound of several high school students outside the cabin loudly checking the integrity, a high school student ran to the front of the nose of the plane with a red flag, and after turning a circle from bottom to top, Chen Wei suddenly pressed the engine start engine button, Yun Yi felt a slight shock from the fuselage, and then the sound of the engine 'buzzing' came from both sides.

"All the instruments of the plane are normal, please take off!"

Chen Wei, who was wearing a helmet, said loudly, the helmet is not used to protect the head, but to place the intercom!

After Chen Wei's report was made one by one, the boy holding the red flag in front of him immediately ran to the side, and then the three students who were inspecting the plane just now ran over with each of them holding three flags, green flags, blue flags, and white flags, squatting on the ground and waving vigorously at the command of the aircraft carrier to allow takeoff.

"Buzz!"

With the waving of the three flags, Chen Wei suddenly pushed the throttle, and suddenly the two engines on both sides of the fuselage let out a roar, and the plane suddenly slowly taxied forward, and the people watching from the outside of the cabin waved to Yun Yi and Chen Wei in the cabin, and Chen Wei gave a thumbs up to the window.

"Buzz, woo"

The plane slid faster and faster on the ground, and after fifteen seconds, the speed reached a speed of more than ten or twenty meters per second, and the taxiing distance reached nearly one hundred meters, Yun Yi suddenly felt the fuselage gently lift up, and then saw the ground on the ground rapidly retreating suddenly shook.

"Ha Lu Ha, it's flying!"

Yun Yi was suddenly excited, and then the plane was getting higher and higher, and the speed seemed to be a little slower, but Yun Yi paid attention to the airspeed meter, and the speed was about ninety kilometers. (To be continued......)

PS: Thank you for the 'Alzheimer's Scorpion' sister for her support!!!!!!!