VIP Author: Wu Jie

After this incident, the two groups of Zongfan Party and Hengfan Party understood that this director Wu Jie was a sullen man, and he was doing practical things when others were playing with mouth guns.

As a result, they developed the habit of going to the Anjiang Shipyard to observe on the spot.

When they were waiting for the recruitment of Qi Mingren shipwrights, they heard that Director Wu Jie had designed two more ship types, and they all hurriedly ran to watch.

At that time, at the edge of the test pool, some of them were standing, and some were still squatting, watching seriously as Director Wu Jie and Technician Fan Xiu were testing a strange ship model - everyone habitually commented on it.

"It's ugly, like a big duck! ＂

"The ratio of length to width is too small, and you will definitely not be able to run fast! ＂

"What is this thing? Sylander or crosssail? ＂

Fan Xiu, a technician in the pool, was impatient after hearing this, and said: "I don't know it, I don't even know the old lock boats that were active in Suzhou Creek before liberation!" ＂

Everyone was dumbfounded, they had really never heard of it, let alone seen it.

Director Wu Jie was kind, and he explained to everyone with a smile.

In the 19th century, the foreigners in the Shanghai Concession found that their sailing boats could not adapt to the changing wind direction along the Chinese coast, so they combined the ship type of Western sailing ships with Chinese sail outfits to build this "four dissimilarities".

It used a western hull, with Chinese stiff sails on two masts and Bermuda-style jibs on the sparks connecting the bow slash to the foremast.

This type of sail improves upwind performance, increases the total sail area, and balances out the annoying upwind rudder problem.

Such a boat, at its limit, even requires only one helmsman and an assistant to sail happily. It is easy to operate and was widely used by foreigners at that time for transportation from the coast of Shanghai to inland rivers.

In the 20th century, when the small steamer was popular, until the Republic of China, it can still be seen actively, which shows that its performance is excellent, and it is very suitable for Taiwan's coastal or inland rivers.

The crowd put on the same expressions.

Technician Fan Xiu was still a little unable to hold back his words, and said with a prickly voice: "I want to laugh when I look at the quarrel in the forum, and I also use Zheng He's treasure ship in the Western Ocean as a basis for the strength of the sail, is it good to have a Chinese-style sail than a longitudinal sail?" The schooner uses the angle between the sail surface and the wind direction to make the air on both sides of the sail show the speed difference, thereby generating dynamic pressure to promote the ship, and the sail only uses the wind on the back to blow the sail surface to form a static pressure to propel the ship. ＂

At this time, Chairman Wu Dapeng, who came first, hurriedly stood up to play a round: "Minkang, then let's use this old gate boat?" Your approach is philosophical. ＂

Wu Jie was stunned for a moment, saying that he didn't understand.

Chairman Wu Dapeng and Director Wu Jie are old friends.

Wu Dapeng once met Wu Jie, who had returned to his hometown to visit relatives while on vacation on Changshan Island in Yantai—at that time, he was still called Wu Minkang, a name with a strong Cultural Revolution atmosphere—and changed his name to Wu Jie when he crossed over.

Lao Wu was honest but not wooden, and at the same time hospitable, he took Wu Dapeng to visit all the scenic spots in Changshan, and also took him to appreciate the local customs, including visiting the place where local boatmen built wooden sailboats.

This time considering engaging in wood merchant ships, Chairman Wu Dapeng did not hesitate to appoint Wu Jie as the director of the shipyard, of course, this has nothing to do with friendship.

Wu Jie's hometown has a tradition of building wooden sailing boats to go to sea, and Wu Jie at least knows some craftsmanship; At the same time, he is extremely serious in his work, and he is still a veteran college student in the eighties, and he is learning fluid lì.

In that world, Lao Wu was in charge of the hydraulic model design of a hydraulic turbine impeller in a large company, and if he didn't know that he was disheartened for some reason that he never wanted to mention, this person would have been really embarrassed to recruit him.

Hearing Chairman Wu Dapeng's question, Director Wu Jie thought about it for a while and said:

"My current test pool can only detect the seakeeping performance, righting torque, sail thrust and thrust center, lateral resistance and resistance center of the hull, and the mechanical analysis software I brought can only calculate the current resistance of each ship type, not the wave resistance, after all, it is not a professional shipbuilding software. I needed to build a dynamic inspection tank that was at least 30 meters long to get the exact number. ”

Chairman Wu Dapeng waved his hand: "Don't be so troublesome, it's the seventeenth century, as long as it's stronger than the sailing ships of this period." However, you can have the test pool you want! ”

"That's easy to do, I'll talk about my idea," Wu Jie, the director of the factory, pointed to the model of the old lock boat and said, "There are many seaworthy rivers in Taiwan, and our indigent/coastal merchant ships choose it, it is simple to operate, the main body is still a Chinese-style sail, and the Ming boaters are quick to use, as long as they are taught to look at the wind direction." ”

After speaking, he pointed to the mast and said: "We use a tapered hollow splicing mast to reduce weight and improve the strength of the mast, because we can use the best part of the wood to cut into wooden strips for making masts, and we don't need to pay too much attention to the length." ”

Everyone knows: there are advanced woodworking machine tools, and there is no pressure on the machining accuracy.

Someone was not convinced and said, "How to solve the glue?" Our epoxy resins are available in limited quantities! ”

"Casein gum! Western mast makers are still in use in the twenty-first century! ”

Technician Fan Xiu couldn't help but interject again.

Director Wu Jie waved his hand to stop Technician Fan Xiu's words, feeling that his tone was a little rushed.

吴杰Factory Director says:

"Because of the increased strength, our mast is two percent higher than that of a Ming ship, and the sail area can be three percent larger, and with the Bermuda spinnaker, the ship is sixty percent larger than the total sail area of a Ming ship of the same size. With the hull line design with low resistance, there is no problem with the speed of eight knots at the appropriate wind speed. Let's add Fan Gong. ”

After speaking, Director Wu Jie went to the pool, went to the workbench on the side to drink with a teacup, and gave the opportunity to explain to Technician Fan Xiu.

Technician Fan Xiu took the opportunity to popularize the knowledge of casein glue to everyone.

Casein gum is a very versatile glue, which can bond wood products or other products, characterized by water resistance, and its main ingredient is casein.

Casein is made from kefirt products with cream removed, and of course goat's milk is also available.

The milk is filtered through filter paper or a thick fabric, the fat is rinsed with clean water, and the obtained casein is spread on the ground to dry. After drying, pure gasoline is used to remove the remaining fat and then it is left to dry.

When making casein gum, as long as the casein is stirred with water and a small amount of ammonia (ammonia water) is added.

The specific method is: take 30 parts of heavy casein, mix with 100 parts of heavy water, set aside for 1 hour, stir the mixture on one side, add 25 parts of heavy ammonia water on the other, and dilute the glue made when you use it, and the consistency can be adjusted arbitrarily.

Even if you don't have ammonian water, you can use borax (4 parts of casein by weight and 3 parts of borax by weight) instead. Mix the casein with water and allow it to expand for a few hours, then heat the paste slightly (not more than 50°C), stirring carefully and adding ammonian water or borax. If it is to be stored for a long time, a small amount of stone carbonic acid can be added to the glue to avoid deterioration.

Technician Fan Xiu said triumphantly: "What's the matter, it's all very simple, right?" At present, some well-known mast maker families in Europe still hide the process of making casein gum as a treasure, but they don't know that there are three production methods that I have mastered. When the ammonia of the Budai Salt Chemical Industry is mass-produced, this is also an industry——"

At this time, someone interjected: "Xiao Fan is very powerful, such a remote knowledge can be Baidu!" ”

"6868 was told to me by Director Wu, who checked the information when he was teaching his relatives to make splicing masts in his hometown." Technician Fan Xiu didn't hear who was interjecting, and glanced at the crowd dissatisfied, not knowing whether people praised him or hurt him, and continued:

"Well, then again, we've improved the sails as well, and I'm sure you've seen a lot of sisal grown in the agriculture team, which is the source of our sails and rigging. Sisal fibre has half the elastic modulus of steel wire and only one-fifth the weight of the latter, so it is more suitable for rigging than wire rope, and at the same time, if you use it to weave sails, you only need a quarter of the thickness of Indian cotton canvas to ensure strength.

This brings two benefits: first, it is easier to raise the sails; The second is to reduce the roll of inertia of the mast, so as to improve the seaworthiness and safety of the ship, and also reduce the requirements for the strength of the mast. ”

Without waiting for everyone to ask, he pointed to the horizontal strips on the sail of the model ship and introduced: "The crossbar on the upper edge of the sail is called the crossbar, the five in the middle are called the slats, and the one on the lower edge is called the sail truss." This is also our weight reduction, we use a hardwood-balswood-hardwood laminate structure, minus 60% of the weight, so that our sail including the baton is only one-third of the weight of the same area of the sail of the Ming Dynasty. ”

Someone asked boredly: "Sisal sails, laminated bones, wouldn't we have no advantage if Mingren learned it?" ”

Fan Xiu technician laughed: "First, before spinning sisal fibers, lignin should be removed by chemical methods; Second, the Ming people don't know how to make casein glue, their pig skin glue and swim bladder glue are afraid of water, and the slats that are pressed out, as long as it rains, as a result, do you want to - hum - it's a pity that Director Wu Jie said that he would sell them a large sum of money -

Taking into account the conditions of the inland waterway, we expect to limit the draft of the old lock boat to 2.2 meters, the width of the ship to 5.7 meters, the length of the hull to 28.6 meters, the total length of the hull to 33 meters, the mast (from the waterline) to be 19.8 meters high, the sail height to reach 425 square meters, and the expected load to be 100 tons. The line type of the underwater part has been greatly optimized by Director Wu, and the maximum speed is 8 knots - that is modest! ”

"Haha, Xiaofan, don't praise me, you've done a lot of work!" Director Wu Jie showed everyone a three-view and said: "This is a two-masted schooner invented by the Dutch in 1700, since the Dutch adopted the upper edge of the girder sail in the 16th century, because it is very easy to operate, it is not only suspended under the stern mast of the fully equipped sailboat, but also hung on the general two-masted ship at that time with its main sail, and it became a schooner, because it was widely used in the Great Lakes region of North America in the 19th century, so it was finally named the North American schooner.

You see, the ship has a front and side sinks, and the weight of the sloping mast and sail replaces the role of the rear stalk, so it can support a higher mast. The longer bow sloping columns, the increased effective deck length, and the mainsail's boom even protruding from the stern add up to a larger total sail area, and let's not forget that our canvas is lighter than theirs.

Since we use it for offshore transportation across the strait, the freeboard is larger than the No. 1 ship, and the bow and stern are relatively warped. It has better wave resistance and stronger seaworthiness.

We use the same craftsmanship and materials as the old gate boats for the mast and sail and the upper girder, so the sail truss is not necessary, and its weight is useful.

In the end, the hull is 36.5 meters long, 7.3 meters wide, 3.7 meters draft, 200 tons of design load, 33 meters high mainmast, and the total sail area reaches an astonishing 830 square meters. ”

"But as I remember, I heard that most of the weight of these brigs was less than 100 tons!" Questions were raised.

"Ask professionally," Director Wu Jie praised, "This kind of schooner is different from the previous one, its mechanical structure has been carefully calculated by Fan Gong modeling, using dense ribs and main, two keels and three keels, and the inner hull of the double hull plays the role of a watertight cabin at the same time, it will also greatly strengthen the strength of the hull - the strength of the mast and sail has also been deduced, the strength is absolutely passable, I don't need three masts to solve the problem with two masts!" - Of course, this is the second phase of the development plan - but soon. ”

Director Wu Jie was full of confidence at this time, and made another oath:

"On this basis, we can also develop three-masted and four-masted schooners, and since then there will be no North American schooners in the world, only Taiwanese schooners!"

A pseudo-ship fan, the question man continued to ask: "Why not develop large schooners with more than four masts, it shouldn't be difficult to splice the keel, right?" ”

"I asked Li Dong, in the near future, he will definitely be able to solve the problem of the steam engine, and it is only a matter of time before the large marine steel plate is used, who is still tinkering with a wooden sailing ship!"

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Author's Booklist:

"Nine Days of Sword Burning", author's classmate, adult work, martial arts stream.

"Super Tech Empire", author friend, tech stream.

"Medical Tao Wushuang", author book friend, urban stream.

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