Chapter 213 The Paddle Ship Plan

Four days later, the caravan hoisted its sails and sailed away from the docks. ? Bayi Chinese ?)〉)〕〕〕〕〉))>]

Tasa and a hundred First Army soldiers set off for the capital together with the boat.

These days, Roland and Margaery reached an agreement, Tasa can withdraw any amount of golden dragons in her store, and this fee will be deducted from the sales amount of the steam engine. In addition, Roland needs to pay an additional 100% one interest.

This time the saltpeter and ore ingots brought by the other party were almost twice as much as last time, but with the deposit for the transformation of the two riverboats, Roland still got more than 2,200 gold dragons, which was almost the same amount in the Moon of Demons. It's an unimaginable number - even if you sell the ore for a month, it's only 300 gold dragons.

After the caravan left, it was time for Maggie to leave Border Town temporarily.

According to the agreement with Ashes, she will go to the fjord islands and bring news about the western region.

Roland specially wrote a long letter to her. In addition to expressing his attitude of mutual assistance and cooperation, he also hoped that the fifth princess could send some auxiliary witches to assist him. In the letter, he did not claim to be an older brother, but negotiated the matter as the lord of Border Town and the governor of the Western Territory. Although the possibility of the other party agreeing to himself is very small, he still has to give it a try—it doesn't take much effort to write a few more words anyway.

The farewell place was in the backyard of the castle, and all the witches were present.

Nightingale gave her a small bag of dried fish; Lightning gave her a bag of pepper.

The other witches stepped forward to stroke her feathers with reluctance, and hugged and bid her farewell—it was like a farewell to her forever.

"Don't worry, goo!" She raised her head and said, "I'll be back soon, goo!"

"What if Tilly doesn't let you come back," Lightning said worriedly.

"Goo..." The pigeon shrank its neck and thought for a while, then shook its tail feathers, "Then I will fly back secretly, coo!"

"Then we have agreed," the little girl promised earnestly, "If you come back, I will personally catch a bunch of birds and roast them for you to eat. And the beehive we found last time, keep it until you come." Take it out together."

"Goo!" She nodded again and again, "It's done!"

What else can I say? Roland was filled with emotion at the side, and in just one month, he had completely abducted Maggie to his side. Well done, Lightning!

"Then, goodbye, Gu!" Maggie spread out her strong wings, and after a run-up on the ground, she slowly flew up, circled twice and then gradually disappeared in the southeast.

"She can arrive smoothly." Roland watched the slow movement and couldn't help but sweat for her.

"No problem," Lightning said without hesitation, then tilted his head, "It should be... right?"

After seeing off Maggie, Roland quickly returned to his busy daily work.

This time, he wanted to draw a complete set of design drawings for the two ships left behind by the Crescent Bay caravan to be rebuilt—and they would also become the first steam-powered paddle ships in the world.

Since a single power source is used, the steam engine power shaft can be directly connected to the paddle wheel without a gearbox. Use multiple intake pipes to control the amount of air intake, thereby controlling the boat. When you want to reduce or stop the boat, just close the intake pipe and let the excess steam escape from the exhaust port. At this time, the fire is still burning, and it is very convenient to lift it up again.

The principle is not difficult, and Roland quickly drew up a rough model. If you want to get accurate production drawings, you have to go to the site to measure the specific dimensions.

At this time, Anna walked into the office with a book in her arms.

"What's the matter?" He put down the quill and couldn't help smiling.

"I've finished reading this book," she put the book on the desk, which was "Theoretical Basis of Natural Science".

Roland's smile suddenly froze on his face. Isn't this too exaggerated? He has read all the mathematics and physics knowledge at the high school level in just a few months? He didn't ask the other party if he understood it, because Anna's reading meant complete understanding, otherwise she would definitely read it over and over again, or come to ask herself.

"Are you drawing these drawings to use steam engines instead of sails to power ships?" Anna's attention was quickly attracted by the sketches on the table, "But..."

"But what?"

"These two wheels are similar to paddles, right? They can generate thrust when they turn, but half of them are exposed, which is equivalent to wasting part of the power. Why not bury them all in the water?"

"..." Roland was stunned for a moment, not knowing what to say. It is impossible for a person who is born with knowledge to exist, that is to say, she made the above judgment based on this momentary impression? He suddenly became interested, "Then what do you think should be better?"

Anna thought for a while, picked up the pen, and started drawing on the paper.

Roland propped up his chin, admiring her with great interest when she was seriously drawing—the bangs that slipped from the folder swayed back and forth with her movements, the slender eyelashes fluttered from time to time, and her fair cheeks revealed a natural rosiness . Although only the side face can be seen from this angle, under the light, the outline from the bridge of the nose to the chin and then to the neck forms a perfect and gentle curve.

"Want some fish fillets?" Nightingale leaned over and inserted her hand between the two of them.

"Well," Anna nodded, swallowing the snacks that the latter handed over, "Thank you."

Roland, whose vision was obstructed, coughed twice, and had no choice but to turn his gaze back to the paintings on the table.

At first, Anna tried to completely bury the paddle wheel in the water, but this would make it difficult for the boat to observe the position of the wheel when it docked, and it would be easy for it to hit the pier or trestle.

Then she arranged the paddle wheel to the stern - this is also a common practice, but the transmission arrangement is much more complicated, after all, the heavy steam engine does not fit at the end of the hull, so the transmission shaft and gearbox will occupy a considerable amount of the hull part of the location.

And when Roland saw the new drawings she drew, he couldn't help marveling at the other party's sharp thinking ability again.

The sketch that Anna was thinking about was infinitely close to the arrangement of a single-shaft propeller. The steam engine was set at the bottom of the hull, the transmission shaft protruded from the hull below the waterline, and the end was connected with four square blades, which looked a bit like a windmill.

"I don't know if this is possible," she hesitated. "It stands to reason that as long as the paddles are kept at an inclination angle, the force in the horizontal direction can be generated. However, I have reduced a paddle wheel, and it may not be possible to push it with four paddles alone. Hull."

"Of course, you just need to modify it a little." Roland took the quill in Anna's hand and drew the original appearance of the propeller. "Compared with the shape of a windmill, this shape of the blade is more suitable for rotating in the water. Your idea is completely Correct, but the requirement in the contract is to transform it into a paddle steamer, so we still follow the first method—this has nothing to do with technology, but a business strategy." He paused, "I'm going to actually measure the hull now Data, do you want to come with me?"

Anna blinked those blue eyes, "Hmm!"

After mastering the theory, verifying it in practice is the best way to learn.

...

"nightingale?"

When Anna followed the prince to the door, seeing that Nightingale was still looking at the blueprints on the table, she couldn't help but speak.

"Ah, you go first, I'll be right there."

After comparing the sketches in her hands repeatedly, she came to a conclusion: Isn't it just that the place where the wheels are placed has been changed? (To be continued.)