Castle of Black Iron

Ever since Zhang Tie was chased by Wing Demon in his glider last time, he had to drive the glider into the water to escape. The engineers at the glider base of the Republic of Hörn have been busy helping Zhang Tie build a new glider. .

In order to build a new glider for Zhang Tie, the commander of the base, Colonel Howerson, also personally contacted the country. The Republic of Hoorn finally sent a team of experts to Cerne with equipment and tools for several train cars. S.

Zhang Tie didn’t know at the time. When he knew it, the expert team of the Republic of Hoorn had already arrived. Zhang Tie was a little bit embarrassed about the mobilization of the army like the Republic of Hoorn. After the base chief, Colonel Howerson explained, Zhang Tie knew that he now In the Republic of Hoorn, it is actually famous.

After the matter about him and this glider base was spread to the Republic of Hoorn, and after being exaggerated by the domestic media of the Republic of Hoorn, almost every citizen of the Republic of Hoorn knew that in the Sernes war zone, one had won the Sernes The brave air cavalry with the honorary title of Eagle is driving the glider of the Republic of Hoorn in combat, and the fruitful results have made the winged demons of the demon clan feel the wind.

In the Republic of Hoorn at this moment, Zhang Tie is definitely an idol.

Therefore, after Zhang Tie’s second glider crashed, the Republic of Hoorn, who learned of the situation, raised the matter to the height of national honor and sent a very powerful team of experts to Cerne with equipment and machinery. Sri Lanka, to build a brand new glider for Zhang Tie.

In the words of Colonel Howerson, the Eagle of Cernes can fly the glider of the Republic of Hoorn to fight for the guardian of the human race in the sky. That is the honor of the entire Republic of Hoorn.

At that time, after the expert team from the Republic of Hoorn came to Cernes, they met with Zhang Tie twice and had some communication with Zhang Tie, because it was during the rainy season, and flying a glider in the sky often lost the updraft. The power brought, and the weather is also a great test for this kind of unpowered flying device. When the experts in the Republic of Horne asked Zhang Tie what kind of glider he needed, Zhang Tie once said this to those experts. A paragraph.

"For me, the wind and air currents in the sky can already be used to the extreme. In this regard, I think it is difficult for you to help me make breakthroughs, but the situation on the battlefield is very complicated. Sometimes, like in the past. In the past two months, due to heavy rain, when these natural conditions cannot be used, as a glider driver, I will be very passive on the battlefield. Driving gliding opportunities has become a very dangerous thing, if possible. , I hope that the glider I will drive in the future can have other sources of power when the airflow and wind cannot be used. Can the glider fly freely in the sky like riding a bicycle? This is my requirement."

When Zhang Tie said this, he did not imagine that the expert team of the Republic of Horne could do it. He just said what he wanted. If those people can’t do it, he doesn’t think Zhang Tie can do it. What will be lost, if he can do it, it will definitely be a huge surprise for Zhang Tie, which means he will be more free in the sky.

A few days after saying this, the expert team of the Republic of Hoorn invited Zhang Tie to the glider base to do two very comprehensive physical tests.

At that time, Zhang Tie didn't know what the driving glider had to do with his physical fitness, but he went there anyway. During the physical fitness test, he only remembered the members of the expert team of the Republic of Hoorn looking at him with bright eyes... …

Since then, the expert team of the Republic of Hoorn rarely contacted Zhang Tie in the glider base. It was only these two days before Zhang Tie received a notice that a new glider was built and he was asked to see it.

On October 7, the glider base of the Republic of Hoorn...

Zhang Tie once again appeared in a hangar at the base. The final product cost dozens of expert engineers from the Republic of Hörn, and a glider appeared in front of Zhang Tie for more than a month by hundreds of mechanics.

The appearance of that glider is somewhat similar to Wind Whisperer II, but the biggest difference between the entire glider and Wind Whisperer II, or the biggest difference from all gliders, is that it has an extra head. Biplane propeller.

Zhang Tie got into the cockpit and found that the layout and settings in the cockpit were completely changed. The steering pedal under his feet was gone. Instead, a mechanism similar to the pedals of a bicycle was replaced. There were also some changes on the elevator. With a little mechanism, the elevators of the previous gliders can only be pulled up or pressed down, but the current elevator rudder, Zhang Tie found that in addition to being pulled up and pressed down, it can actually be like the steering wheel of a car. It turned around ninety degrees on both sides, and under the elevator, there was an extra push rod for unknown purpose.

In addition to these, the entire glider still retains a very obvious Zhang style-the seat of the glider is foldable, and there are still two on the left and right sides of the cockpit that he can use to "lift up" the glider. The concave handle, the bottom cover of the glider cockpit is still slidable.

Zhang Tie was a little excited and looked around in the cockpit of the glider. Finally, he couldn't help but step on the same thing as a pair of bicycle pedals with his feet.

For ordinary people, it may be very difficult to step on that pedal. If you use less energy, you will not necessarily be able to step on the pedal how many times, but for Zhang Tie, he stepped on the pedal. It feels really not much more difficult than ordinary people riding a bicycle.

As soon as the pedal was stepped on, the two propellers at the head of the glider spun up with a whirr. Zhang Tie’s feet slowly accelerated, and the propeller at the head of the glider turned faster and slowly. Yes, Zhang Tie found that the entire glider had followed and started to slide slowly forward on the ground.

When the glider was running in the hangar, Zhang Tie moved in his heart and manipulated the rudder to turn to the right. The glider also began to slide to the right when it was sliding. Zhang Tie manipulated the rudder to turn left and the glider also Start to turn left in a circle.

Zhang Tie was very excited. He finally understood the ideas of the experts in the Hoorn Republic. Since the propeller can propel the glider on the ground to make the glider go forward, then, in the sky, this thrust also exists. This is how this glider is working. The extra power available in the sky.

Zhang Tie jumped out of the stance cabin of the glider and happily asked the experts and engineers in the Republic of Hoorn, "How did you do it?"

"What you said to us at that time gave us a lot of inspiration and inspiration. After serious thinking, we learned from the design ideas of early human aircraft before the catastrophe, and used a variable-speed gear set and chain to step you down. The power generated when the pedal is moved is transferred to the front propeller, giving this glider the ability of an early human aircraft before the cataclysm, and it can get extra power when the glider cannot take advantage of the updraft and wind."

"Thank you, you are really amazing!"

"Such a glider is specially designed and manufactured for you. If you switch to someone else, such a design may be of little use to them, because their strength and physical strength may not be able to support such a flight for too long. Remember the test we did with you earlier, we found that the strength on your legs is very strong, and your physical strength and endurance are also extraordinary. If you convert the strength on your legs into the power of a machine, your double The legs are roughly equivalent to a good-performance 20-horsepower engine. It is precisely because of this that we have this design idea."

"Ah, is the power on my feet equivalent to the power of a 20-horsepower engine? How much is that?"

"Ordinary people who have not ignited a bright spot generally can produce only one horsepower in one minute, and within ten minutes, the maximum power that an ordinary person can produce is only about half a horsepower. The so-called 20 horsepower engine Power, roughly speaking, is equivalent to when you are lying down, with your feet supporting a 1500 kg object, and within one second, the object is raised by one meter, and it can be repeated continuously. This process. This is not an instantaneous explosive force, but a continuous and repetitive force. In terms of explosive force, the power of many people's feet can easily exceed 1500 kg, but if you want to let a person in half an hour or Within an hour, with both feet constantly repeating the process of lifting a 1,500 kilogram object one meter in one second, there are very few people who can do it."

"Oh, it turned out to be like this!" Zhang Tie suddenly realized. He didn't expect his feet to be comparable to a 20-horsepower engine at this moment. This made him a little proud. Not everyone has this ability.

"Can I step on this pedal now to make the glider fly directly into the sky?"

"Although we have set up an assistant device that uses pedals to drive the glider up, the requirements for your strength will be very high, but if you reach the sky, the situation will be different. As long as your physical strength can support it, let The propeller maintains a minimum speed of more than 800 revolutions per minute, and it can provide endless power for this glider, so that this glider can still have very good flight and control performance without relying on climatic conditions. We think Now that this glider can no longer be called a glider, it should be called a human-powered aircraft!"

"Human-powered aircraft, this name is very interesting!" Zhang Tie laughed. Thinking of the former Brotherhood of Aircraft, Zhang Tie felt that airplanes seemed to be too related to him. He didn't expect that he could really fly planes now.

"Can I try it now?"

"of course!"

"I still don’t understand. What does the push rod under this elevator do? I think there are a few numbers written here. They are 50, 30, 15 and 5, as well as a space and a ground. What does this mean? ?"

"This is a variable speed transmission lever. It can adjust the speed ratio between the power pedal and the propeller and the power output direction of your pedal. There are two power output directions and four gears. Of those four gears, the highest The gear position means that you can make the propeller of this manpowered aircraft rotate 50 times by stepping on a pedal, and the next gear is 30 times, and so on. The higher the speed ratio, the force you need to step on for one turn. The higher it is, it can be flexibly adjusted according to your physical strength. The air and ground represent the power output direction of the pedal. The air word corresponds to the power transmitted to the front propeller when you step on the pedal, providing a glider in The power in the air, and the word ground, means that when you step on the pedal, the power will be transmitted to the landing wheel on the glider, just like riding a bicycle, allowing the glider to run on the ground..."

...

A few minutes later, after Zhang Tie thoroughly understood how the human-powered aircraft was operated, the human-powered aircraft was pushed onto the runway.

Zhang Tie sat in the cockpit again, pushed the gear lever to the ground position without thinking about it, and then he pressed his feet and started to step on the pedal...

Without the tractor towing, Zhang Tie did not raise the glider to run, Zhang Tie just stepped on the pedal like a bicycle, and the glider on the runway became faster and faster. Finally left the runway and flew into the sky...

After flying into the sky, Zhang Tie pushed the gear to the 50 position below the empty letter, and then began to quickly step on the power pedal, and the front propeller quickly turned...

Finally, without the help of wind and updraft, Zhang Tie relied on the strength of his feet to let the human-powered plane fly in the sky like an airplane.

...

The feeling of driving this human-powered aircraft in the air is really indescribable to Zhang Tie. If he is driving an ordinary glider, he still needs to pay attention to the direction of the wind and airflow at all times. While driving this human-powered aircraft, Zhang Tie feels that he really is Freedom, complete freedom in the sky.

In Zhang Tie’s feeling, this thing can’t be called an airplane, but a sky bike. As long as the body has strength, as long as the pedals under the feet are constantly stepped on, this human-powered airplane can be in the sky. Free to fly.

In free flight, when encountering the updraft that can be used, Zhang Tie can use it as a glider as he wants to drive, so that he can rest and recover his strength. When there is no air flow available, Zhang Tie Stepping on it again, you can still make it fly as you want, without considering the influence of the weather.

If Zhang Tie stepped on the power pedal while flying with the airflow and allowed the propeller to work with it, Zhang Tie found that his flight speed could be as fast as 20-30%.

With such a human-powered aircraft, Zhang Tie is more confident about the task he promised to take over...

...

PS: On the earth, human-powered aircraft can fly more than 100 kilometers at the farthest point in the 1980s. Have you ever thought that one day human-powered aircraft competitions can become an Olympic event? Haha...

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