In this time and space, there is a kind of sand boat that often sails in the Yellow River.

This type of boat was first seen in the Tang Dynasty, commonly known as a flat-bottomed boat, and was used for both sea and river.

It is characterized by a flat bottom, a small flat head, a stern with a stern, a long and shallow draft, small and stable resistance when sailing, easy to dock or travel------ generally two sails and two masts, a little larger is three sails and three masts, and the cargo that can carry fifty tons is considered large.

Previously, Zhang couldn't wait for the director of Zhang Laoshi to design any new sailboats, so he directly introduced the bird boat type that was popular in the Ming and Qing dynasties to him, and asked him to directly model and start work.

It was a kind of small fast boat that was popular in the Ming and Qing dynasties along the coasts of Fujian, Zhejiang, and Guangdong.

It is not only suitable for coastal use, but also for inland waterways, and can carry a load of 100 to 200 tons and a draft of 3 to 5 meters.

It resembles a waterfowl floating on the water, hence the name.

In addition to sails, the bird boat also has large oars on both sides.

It can sail when it is windy at sea and rocking when there is no wind on the river, so it can move flexibly like a bird.

Zhang Laoshi, the factory director, built a five-masted and five-sail ship model, and he was peeping around his ship model and sniffing around, with a look of surprise.

He said happily: "This thing is far better than a sand boat, and the swordfish boat is like a canoe compared to it!" ”

At that time, Zhang Island Master said calmly: "Is it too deep?" ”

"Not deep, not deep!" Director Zhang Laoshi shook his head happily and said, "Looking at the rivers, lakes and seas in the world, where the water is two or three feet deep, everything you see is also!" Besides, I have cotton and linen canvas to save a lot of weight------ and basa wood to use------ and the pirate skiers who have captured them will also be useful! ”

Zhang Island Master thought for a while and said, "Well, you can build some first, and when the time comes, we will directly build a sailboat!" ”

"Sailboat! What is a sailboat?! ”

"Did you see the pot camel machine?"

"I've seen ------ use it to drive a circular saw, and it's twice the result with half the effort, but it takes ------ saw."

"That's because the quality of our circular saw is not up to par------ if we use it to drive the propeller, instead of people to rock the oars, or instead of people to pedal the boat, what will it be?!"

Director Zhang was stunned and speechless.

To be honest, Zhang Daozhu was actually quite disappointed------ those so-called great craftsmen were not as smart as he imagined.

At that time, there were nearly 20 large and small shipyards and nearly 20,000 craftsmen on the whole Liuqiu Island, who watched the pot camel machine running non-stop on the wharf, fields and highways all day long, and also saw the car and boat on the Badao River running back and forth------ the pot camel machine could be loaded onto the iron car instead of animal power to pull the goods, didn't anyone think that it could also be loaded on the ship! ”

Director Zhang Laoshi muttered: "That pot camel machine is too heavy and too big------

Zhang said: "That's simple, you can increase the number of cylinders and reduce the volume and weight!" ”

"------ fireworks may ignite the sails ------"

"It's even simpler, you can install a small fire protection device at the smoke exhaust outlet!"

“------”

"In the near future, if you come up with 15, 40 and 80 horsepower diesel engines with big flywheels------ then it will be lighter and more powerful."

“-----------”

"Even if the propeller transmission is a little more complicated, you can just use the paddle wheel type, how simple it is!"

“------------------”

Later, Zhang regretted the conversation with Director Zhang Laoshi.

It's not because he was in a hurry------ but because the factory director Zhang Laoshi began to be dishonest, he completely handed over the construction of the bird boat to his son and apprentices, and locked himself in the hut to build the so-called "sailboat".

Zhang did not give him the equipment data of the so-called pot camel engine or diesel engine, which he couldn't give, because Zhang didn't know what kind of equipment Wang Defa could eventually manufacture.

So Zhang relied on his imagination to reserve counterweights and space.

The model ship he took out for the first time made Zhang Island Master smile: "The little place you left is too small, I'm afraid it's nuclear power equipment." ”

In fact, Zhang Island Master is just joking, where has he ever seen nuclear power equipment?!

But it scared Director Zhang Laoshi again, what is nuclear power??!!

After being questioned in every way, Zhang Daozhu could only say that he was joking, there was no such thing in this world.

Without further ado, five Flying Bird ships were built at the same time in less than two months, and this type of ship soon spread to the Great Song Dynasty.

The innovation ability of the ancients in this time and space may not be good, but the ability of cottages is not said------ especially after the basic solution of transportation and communication problems, the frequent exchanges between the two sides of the strait have greatly improved the ability of both sides of the strait.

After Zhang Island Master sent a special agent team, according to the prior agreement, they sent a backup team, a three-masted and three-sail bird ship and a five-masted and five-sail type, one large and one small, with the last southerly wind season of this time and space, directly into the Yellow River!

For complete consideration, the two Flying Bird ships were each armed with eight and twelve bronze tiger guns, the shells were mainly shotguns, and armed sailors were also equipped with long and short guns.

It's an adventure and an exploration------- but the two captains of the Asuka ship don't take it seriously.

They had been seaworthiness for half a month beforehand, and they had also conducted a forced landing exercise on the Liudao River.

The two of them were ambitious, saying that even if they were besieged by a hundred and ten river boats, they would dare to guarantee that they would escape with their whole body!

In fact, the Tatar robbers simply did not have that strength on the Yellow River.

The Liuqiu Guards had already sent agents to survey some major rivers, and they did not dare to say that they had learned all the hydrological data, and the basic situation was still known.

Two bird boats, one large and one small, broke into the Yellow River at the scheduled time!

Along the way, they encountered several interceptions by so-called river soldiers------ but they simply ignored them, either ramming and capsizing the opponent's boat, or firing a few shots from a distance, so frightened that the opponent turned around and ran.

The two captains stood at the bow of the boat and laughed, and said loudly: "If I hadn't waited for the heavier load, I would have sunk you one by one at the bottom of the river!" ”

Two bird boats are moving upstream on the Yellow River with difficulty and force.

The pirate riders in the bilge were the pirate rowers they had captured earlier------ and although they were not free and had to work all day on the island, they had far better food and shelter than they had been pirates, and many of them were much stronger than they had been in the past.

They felt that it must be a great thing that they had been selected to participate in this operation, and maybe they would indeed regain their freedom.

Each of them was paddling hard.

The sail operator on board is also a veteran------ he constantly adjusts the sails according to the direction of the wind, and the pulley block provides him with convenience.

There were also Tatar cavalry who followed them on the shore------ but it was useless, the two bird boats had no intention of docking at all------ the cavalry followed, and found that it was a useless thing, and had to watch the two big ships go away.

The two bird boats arrived at Hakubado three days later than scheduled.

Captain Huang didn't care, this kind of agreement was not too late for ten days at night.

The original inspector was taken aback by these two big ships.