Release that Witch

175. Chapter 175 Hot Air Balloon Tour

    The principle of hot air balloon is very simple. There are only two difficulties in making it. One is the burning device, and the other is the air bag.

    The first point is that in the absence of a pressure vessel to provide gaseous fuel, firewood or charcoal alone can be used to heat the air. The efficiency is low, and it is not far from the fuel limit. This is also the principle of hot air balloon discovery in history, but the reason for the hot air balloon is the first to put it into practice. So Roland simply gave up the burning device and let Anna heat the ignition.

    The difficulty of the air bag lies in the airtightness, but for Roland, which draws on the experience of the predecessors, this problem is easy to solve – using laminated fabric. The outermost layer of the air bag is a wear-resistant canvas with a cow’s intestine film in the middle and a light gauze on the inner layer, so that it can be sealed to prevent air leakage and not afraid of bird sniping.

    Roland opened the bottom of the air bag and let Anna spray a black fire with a temperature close to the normal flame. The air bag slowly swelled up and looked like a wrinkled winter melon. Considering that the hot air balloon needs to be lifted by two people, the air bag has a diameter of five meters at the widest point, and the intestine film of twelve cows is used, and the sewing work is close to one week. If it is not the jurisdiction of the feudal lord, it really does not necessarily make such a big toy.

    “Does it fly with the buoyancy provided by the hot air?”Anna asked. “I remember in the book that hot air is always rising.”

    “Yes, hot air rises and cold air sinks is a common natural phenomenon. Using particle theory to explain, the hotter air ball is intensified, and the ability to diffuse around is strong, and the density becomes smaller after volume expansion. For air that does not change around, it is equivalent to lightening and therefore rises. ”

    After speaking about the principle, Roland found that except for Anna’s expression of “So that’s it”, the other three were all stunned, and he couldn’t help but secretly sigh the talent’s importance.

    When the air bag was fully inflated and floated up, the towing rope was slowly straightened and Roland took the lead in the basket and then took over the climbing Anna.

    “I’m still a little worried,” Nightingale said. “Don’t you let me go first and give it a try.”

    “Trust me, nothing will happen,” Roland smiled easily. “And even if there is an accident, Lightning is there.”

    “I will catch them, rest assured.”Lightning patted the chest.

    “me too 咕!”Macy learned how Lightning looks like a chest.

    With a sway, the hot air balloon took the basket off the ground and gradually climbed up. Not long after, the two crossed the top of the castle, and the whole picture of the small town was presented to them.

    For Roland, this scene is not unfamiliar. After all, he is also a person who has seen the skyscraper, but in Anna’s eyes, it is a new experience that is completely different from the previous perspective. She squatted on the side of the basket and looked out, and one hand firmly grasped Roland’s arm, which seemed exciting and tense.

    This is the first time Roland has seen her show her eyes. People who have never left their feet with their feet will have a slight fear of height when they first fly to the sky.

    Soon, the hemp rope under the basket used to hold the hot air balloon was pulled to the limit and the rise stopped. The hemp rope is about 50 meters long, which is the height of the 15th and 6th floors of the later generation. Roland let Anna reduce the firepower and the hot air balloon finally hovered in the air.

    Lightning was still at the edge of the basket, and when he saw the basket stable, he was relieved to play the chase game with Macy around the hot air balloon.

    Looking down from here, you can clearly see the castle roof, the small town where construction is everywhere, the Scarlet Water River flowing from west to east, and the verdant farmland along the river.

    What do you think?

    Ronal asked with a smile until Anna retracted her head.

    “Thank you for your present,” she said excitedly. “I can fly so high.”

    “It can be even higher,” Roland sat down against the side wall of the rattan basket. “If the hemp rope below is longer, flying ten times this distance is fine, but the more complicated the airflow, the more complicated it is. Sex is hard to protect. And this is just a junior aircraft. After the piston machine is built, ordinary people can fly faster than birds, higher than birds, and then go back…”He looked up at the blue sky. “People can even fly out of the world and head to the boundless space.”

“……”Anna held her breath, her eyes sparkling, and something was coming out.

    “I can’t guarantee to fly out of the world,” Roland laughed at her appearance. “But the piston machine is built so that ordinary people can fly like birds, and they should still be able to do it in their lifetimes.”In fact, there is no bottleneck in the processing capacity of Anna. The current short board exists in material properties. Inferior pig iron can make steam engine, wrought iron can make guns, and steel revolver smelted with black fire is not a problem, but if it is an internal combustion engine, it may be necessary to have high-quality qualitative cast iron, cast steel or aluminum. “Border Town can be what it is now, all this is your credit, “Miss Anna.” ”

    After hearing this sentence, Anna stunned. After a while, she sat down and whispered. “My mother died in a fire, but I was not only buried in smoke and fire, but became a witch. For a long time, I thought it was my awakening that led to this fire, and I was extremely disgusted with myself as a witch. When I was in jail, I thought that I might be able to liberate, but you saved me from prison and taught me how to use my abilities…I did not think that the flame can have so many uses besides causing burns and pain. ”Anna paused, “I can feel very satisfied when I meet you, but now I find that my thoughts have changed. Sometimes I feel my heart is uncomfortable and I hope to get more.”

    She climbed onto Roland’s shoulder. “Even if you want to hire me?”

    Her blue eyes sparkled, her breath blowing on her face, and it felt a little itchy. Through the thin clothing, he can feel the soft body and the heartbeat of the other side. Despite this, she did not look away from her gaze – she was always passionate and active when she didn’t have Nightingale.

    “There is outside…”

    Roland hasn’t finished, Anna has sealed his lips.

    After separating, he gasped a little. “I want to hire you, always. Miss Anna. ”

    “Mn.”

    This time, he took the initiative to bow his head and put it with her.

……

    “Oh, wait,” Macy chased Lightning for a moment, and suddenly stopped in the air, looking at the empty hanging basket. “They are gone!”

    AH
Lightning glanced at him. “They just sat down.” ”

    “Do you not see the scenery outside?”

    “The scenery can be seen at any time, but there are not many opportunities like this.”

    bookMacy shook his wings and landed on Lightning’s shoulder. “I don’t understand very well, do you want to see them?”

    “That can’t be done,” Lightning grabbed the pigeon. “This is a sacred ritual that cannot be interrupted.”

    “Hey?”

    “In short, you will understand later, this time, as long as you don’t see it, this is my father – the greatest explorer told me.”Lightning throws Macy, akimbo, “Run now, change me to chase you!”