Four days later, the caranies raised their sails and left the dock.

Tassa, along with a hundred soldiers of the First Army, set out on a boat for the royal capital.

These days, Roland and Margery reached an agreement that Tsa would withdraw any amount of the Golden Dragon in her shop, which would be deducted from the steam-roller, in addition to which Roland would have to pay an additional one percent interest.

This time, the nitrite and ingots brought by the other side were almost twice as much as the last, but with the deposit of the transformation of two inland boats, Roland still obtained more than two thousand two hundred golden dragons, which was almost unimaginable in the demon month - even if it sold for one month's ore, it was only 300 golden dragons.

After the carnage left, Maisie also arrived at the day of leaving the border town.

According to the agreement with the ashes, she will go to the fjord islands to bring news about the western part.

Roland wrote a long letter to her, in addition to expressing mutual assistance and cooperation, but also hope that the five princesses can send some auxiliary witches to help themselves.In the letter, he did not identify himself as his brother, but negotiated the matter as the lord of the border town and the west.Although the other person's chances of promising himself are very small, he still has to try - anyway, writing a few more words can't take any effort.

The location was in the back yard of the castle, and all the witches arrived.

The Nightingale gave her a small bag of dried fish; the lightning sent a pack of pepper.

The other witches, stroking her feathers on the ground, hugging her goodbye—the same may be as good as saying goodbye.

“Don’t worry!”She raised her head and said, “I’ll be back soon, huh!”

“What if Tily doesn’t let you come back,” said the lightning worriedly.

“Coo...” The pigeon shrank his neck and thought for a moment, shaking his tail, “Then I will sneak back and come back!”

"Then we shall say," promised the little girl earnestly, "if you come back, I will catch a flock of birds to roast you for food."And the hive we found last time, keep it waiting for you to come and take it off together."

“Goo!”She nodded, “Say it!”

What else can I say?Roland felt a thousand times, and only a month later, Maisie completely turned to his side.Very well done, lightning!

“Good-bye, everyone!”Maisie spread her wings, helped to run on the ground for a while before slowly flying, circled two laps and gradually disappeared into the southeast.

"She can get there."Roland looked at this slow movement and couldn't help but squeeze the sweat for her.

“No problem,” said the lightning without hesitation, then crooked his head, “should it...?”

Sending out Maisie, Roland quickly put himself back into his busy day job.

This time, he’s going to draw a complete design for the two ships left by the String Moon Bay caravan — and they will be the world’s first steam-powered Minghuo.

Due to the use of a single power source, the steam engine power shaft can be directly connected to the bright wheel without the need for a gearbox.Control the intake of air with a plural intake pipe to control the speed of the ship.If you want to slow down or stop the ship, just turn off the intake pipe so that the excess steam will leak out of the exhaust port.At this time, the fire is still burning, and it is very convenient to speed up again.

The principle was not difficult, and Roland soon drew a rough model.In order to get accurate production drawings, you also have to go to the site to get the specific size.

At this moment, Anna walked into the office with a book.

“What happened?”He put down his quills and couldn’t help but smile.

“The book is finished,” she said, putting it on her desk, which is the theoretical basis of natural science.

Roland's smile suddenly stiffened on his face, which is too exaggerated, and he only read all the high school-level mathematics and physics knowledge in a few months.He did not ask the other person whether he had read it, because Anna's reading meant that she understood it completely, otherwise she would definitely look at it again and again, or come and ask herself.

“Do you want to replace the sails with a steam engine to power the ship?”Anna’s attention was quickly drawn to the sketches on the table, “but...”

“But what is it?”

“These two wheels are similar to paddles, aren’t they?”When the rotation can produce thrust, but half of it is exposed outside, which is equivalent to wasting part of the power.Why not bury it all in the water?”

“Roland staggered, not knowing what to say.The person who was born cannot exist, that is to say, she made the above judgment by relying on the impression of this moment alone.He suddenly became interested, “Then what do you say is better?”

Anna thought for a moment, lifted her pen, and began drawing on the paper.

Roland held her chin, and admired her with interest when she made the picture seriously - the bangs that slipped from the hairpin to shake back and forth with her movements, the elongated eyelashes beat twice from time to time, and the white cheeks revealed the natural rosyness.Although this angle can only see the side face, but in the light of the light, from the bridge of the nose to the chin and then to the neck of this outline to form a perfect and soft curve.

“Do you want fish?”The nightingale came together and put his hand in the middle of the two.

"Well," said Anna, noding, containing the snack the latter handed, "thank you."

Roland, whose sight was obstructed, coughed twice, had to turn his eyes back to the paintings on the table.

At first, Anna tried to place the Ming wheel and completely bury it in the water, but this made it difficult for the ship to observe the position of the wheel when it came to land, making it easy to crash into the dock or trestle.

Then she arranged the Ming wheel to the stern - which is also a common practice, but the transmission setting is much more complicated, after all, the bulky steam engine is not suitable for the end of the hull, so that the shaft and gearbox will occupy a considerable part of the hull position.

And when Roland saw her new drawings, his heart could not help but marvel at the other person's keen thinking ability again.

The sketch Anna was pondering was infinitely close to the arrangement of the single-axis propeller, the steam engine was set at the bottom of the hull, the drive shaft sticking out of the hull from below the waterline, and the end was connected with four square paddles that looked a bit like a windmill.

“I don’t know if I can do it,” she hesitated, “it’s reasonable to say that as long as the paddles are kept at an inclination, they can produce horizontal force, but I have reduced a bright wheel, and four paddles alone may not be able to push the hull.”

"Of course, just a little modification."Roland took Anna's handicraft pen, drawing the original appearance of the propeller, "than the shape of the windmill, this shape of the paddle leaves is more suitable for rotation in the water."Your thinking is completely correct, but the contractual requirement is to transform into a Minghu ship, so we do it the first way – it has nothing to do with technology, but with a business strategy.”He paused, “I’m going to measure the hull data now, are you going to come with me?”

Anna blinked the blue eyes, “Hmm!”

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

...

“The Nightingale?”

Anna followed the prince to the door, and saw that the Nightingale was still looking at the drawings on the table, and could not help opening her mouth.

"Come on, I'll be there soon."

After repeatedly comparing the sketches in her hand, she concluded: Is it not the place where the wheels are placed to change the position?(Unfinished.