The envoy group from Waterdeep City finally left. Heller Borla was full of regret on the surface, but she was so happy in her heart that it was wonderful to be able to leave with her daughter all bearded and unscathed.

Regarding the meeting with Her Royal Highness the Princess, the other party made a compromise and agreed to Leah's plan. However, in terms of timing, further discussion is needed.

Natalie's mood is depressed, and she feels that there is an invisible barrier between her former good sister Alice and her. She repeatedly begged her father, but she didn't get an answer.

When the envoys visited, Sir Bora brought a lot of gifts in the name of the family, and the Blackstone Collar was not stingy and returned the gifts they had carefully prepared.

Maltose, fried melon seeds, finely ground wheat flour, corn flour, etc., are all processed products. As for the seeds...... Of course, churn is not allowed.

For a territory, especially in a difficult winter, food is more valuable and more sincere than others.

However, Borla's thoughts on these blackstone creations, whether they will eat them or not, is another matter.

After all, in his eyes, these are all 'creatures of evil gods'.

If you have a mind, it doesn't matter if you eat it or throw it away.

In all conscience.

The dust settled, and the Blackstone Leader was once again on track and running at full speed. Every witch doesn't dare to slack off, and tries to do her job well, even after falling asleep, she has to have a short meeting before starting to challenge the increasingly difficult dream ring.

By the way, Linda is still a steady leader in the ring, and Luna is also a safe and unlucky person in the ring.

The moon is in the middle of the sky, and the light is like autumn water.

Alice's Laboratory.

An experiment had just begun, and in the middle of the room was a sink half a meter wide and about three meters long, filled with water. In the center of the sink, a metal cylinder with a dark blue glow and a slender arm is mounted with a metal bracket, and the intersection of the two sides of the bracket is located on the slide rail on the side edge of the sink.

"The sixth turbulence test, begun. ”

"Turn on the switch. ”

On the ground on one side of the sink, there is a gate similar to an electric gate, which is connected to the latest hemispherical magic energy supply device, the Flower of Energy.

The gate knife closes, and the magic is connected.

The metal cylinder in the sink caused the stand to tremble slightly, and a torrent of water sprayed out from the tail nozzle.

The spring mounted on the guide rail immediately stretches at high speed in the opposite direction of the torrent until it is stretched to the extreme and cannot move forward.

Alice, who was wearing a bright silver pleated witch dress, quickly glanced at the readings engraved on the guide rail, and recorded them, before waving her hand and saying, "The readings are out, the experiment is over." ”

The gates closed, and the sink fell silent.

"How much?"

Qin Song walked around from the side of the sink and stood side by side with Alice, watching her record reading.

1.33 meters.

"Yes, there is progress. Compare the rally table. Qin Song turned around and took out a list of recorded data from his desk and found the corresponding value: "1.33 meters, about 435 pounds." ”

The spring on the guide rail is actually a high-strength tensile force meter, and the amount of deformation and the amount of force experienced are measured in advance by suspending heavy objects and tabulated.

The pulling force is not calculated in the ox, but in weight. The reason is that it is more convenient to calculate the thrust-to-weight ratio of the turbulent injector, that is, the ratio of the mass of the engine to the mass that can be pushed by the thrust, and it is also possible to use the unit of mechanics, but it is more troublesome to convert.

The first thing to say is that this value is not rigorous, just for the sake of convenience.

The reason for this is that this ejector is not a flying machine, and the density of water is much greater than that of air. For example, the thrust of a propeller at the same power in water is much greater than that in air.

It is important to know that the density of water is 1tm³ and the density of air is 1.29kgm³, and the flow rate per unit time is hundreds of times different at the same power.

This is also the main reason why aero engines need to draw in high-pressure air. Many aero engines, on plateaus or in thin air areas, will have a serious drop in power.

Density issues!

Ships with tens of tons of propellers behind their buttocks are often smaller than helicopters. delicacies

Pin, you taste.

Of course, under the existing conditions, only the concept of thrust-to-weight ratio is proposed to facilitate the expression and understanding of some parametric data.

"The full weight of the ejector is 6 pounds, well......" Alice quickly calculated through two data, and her eyebrows gradually raised: "Qin, we succeeded, the thrust-to-weight ratio is about 72." ”

"About 72.5. Qin Song added, his eyebrows furrowed: "It is 24 years higher than the No. 5 testing machine, and it seems that our turbine device has played a great role." ”

Yes, it's a completely new concept, based on Joe's [Unrestrained Turbulence] sigil, and is suitable for ocean navigation.

The design of the engine is inspired by the aviation turbofan engine of the previous life, and the tail nozzle discharges a high-speed jet to produce a reaction thrust. The overall structure consists of a nozzle, a turbulence chamber, an inlet culvert, and a front and rear turbine to increase the intake volume.

The flow of water enters through the inlet culvert installed in front of it and arrives at the turbulence chamber with the turbulence sigil depicted, and the sigil is connected to the magic power and starts to operate, accelerating the water flow in the chamber into a high-speed jet that is sprayed out of the nozzle.

In fact, in the high-end yachts of the previous life, jet jet high-speed engines were developed. However, its high-speed jet is still formed by the propeller in the built-in duct.

Since water is incompressible, high-pressure compressors, high-pressure turbines, complex electromechanical controls with high technical content in aero engines are not needed at all.

The jet velocity of the jet, depending on the strength of the mana, can be controlled by a simple mana speed control device.

The idea was perfect.

However, it still took five experiments to build the No. 6 verification machine in front of him.

Of course, it's not without its problems. For example, in order to improve the thrust-to-weight ratio, two additional sets of ring-shaped turbulence sigils were added to the turbulence reaction chamber, but the results were surprising - after the verification machine obtained a high-speed jet for a short time, it would produce intermittent dumb fire, like a fart being released several times, and the jet was not continuous.

After many days of observation, it was discovered that the reason was that the power of the turbulence sigil was too strong, and the volume of water sprayed out per unit time was greater than the volume of water entering the inlet culvert. When the jet is ejected, there is not enough water to enter the reaction chamber, which will form an instantaneous space-cavity effect, and the turbulence sigil will be stagnant for a short time, and when the water enters, it will start to be sprayed again......

To put it bluntly, people run too fast and the air can't keep up.

In order to solve this problem and further improve the thrust-to-weight ratio, Qin Song sacrificed the turbine Dafa!

A rotating shaft through the reaction chamber is set up in the duct, and a coaxial turbofan is installed in the two sections of water outlet and water inlet, when the high-speed jet is discharged, the turbofan at the jet port will rotate at high speed, and the rotation speed will increase with the injection speed, and the water inlet turbofan will be driven to rotate at the same high speed through the coaxial principle, so as to increase the suction of the water inlet, increase the water absorption per unit time, and provide sufficient water volume.

After the iteration of the No. 3 verification machine and the No. 5 verification machine, and the parameters were recorded and corrected many times, the experiment of the No. 6 verification machine was completed today.

The thrust-to-weight ratio is 72.6!

Proud data.

And that's not the final value, the strength of the mana supply can be seen as power. When the flower of energy is more abundant and more capable, its potential is limitless.

"Qin, I think we can continue to improve. Alice, who was immersed in joy, had a red glow of excitement on her face: "It's much more interesting than a propeller." ”

"It's true that it can be rebuilt, but not now. We're running out of time. Qin Song smiled slightly: "This kind of thrust can basically meet the requirements." ”

"Okay. Alice nodded, and then remembered the question that had been bothering her for a long time: "But what about the sealing problem?"

Going around and around, back to the conundrum.

However, Qin Song had already thought about it: "Then don't seal it." ”

"Huh?"

"In a hurry, we can think differently. This new engine, let's just call it a turbulent jet engine, is small in size, simple in construction, and most importantly in saving materials, we can have a little luxury, all the structures are made of high-strength, corrosion-resistant Dream Weaver alloy!"

"Alice, with its water absorption and water spray structure, needs to be in the water as a whole. Then let's just hang it on the sides of the hull. ”

"Plug-ins?"

"That's right. "Regarding this plan, in fact, Qin Song has been thinking about it for a long time, the propeller plan has not progressed for a long time, in addition to the sealing problem, it is also necessary to carry out structural damage to the hull, especially the underwater part of the stern, before the propeller can be installed.

As a result, sealing problems arise and incoming water can enter the ship's hold, leading to safety issues that are difficult to deal with.

In this case, the engine is completely hung on both sides of the hull, anyway, the magic is not electricity, it is not conducted in the water, and it is introduced into the cabin from the side of the ship through the guide rails or wires, so that the hull can be no longer damaged, and there is no need to worry about water seepage.

There is another great benefit to doing so.

That is, even if the engine fails, it can be dismantled and installed on site in the form of spare parts, which greatly increases safety.