Magi Craft Meister

There is a facility called a wind tunnel.

In short, it is a facility that 'blows the wind' and 'experiments'.

A 'hole' indicates a facility isolated from its surroundings.It may cause strong winds to blow, so that no damage is caused to the surrounding area, and to arrange the flow of wind.

It is unexpectedly (among others) important to "set the wind in motion."

In reality, there are few regular winds, but if the flow of wind is disturbed, the 'reproducibility' in the experiment will be poor.

Normally, it is often confirmed by a reduced model, but if it is a huge wind tunnel, it can be experimented with as large as a car or a small plane.

Incidentally, there are also methods of performing ship experiments using liquids such as water instead of wind (in this case, it is not called wind tunnels).

Generally, winds up to subsonic speeds are fans, and winds above sonic speeds often use compressed air.



On Onogoro Island, piercing work was carried out to create the "wind tunnel", which was completed on December 1, 3901.

Well done, tester.

Yes, Marika.

"Testa", the magical leader of "Onogoro Island", replied.

Wind tunnels are as large as gymnasiums, and can be tested on objects up to 20 meters in length and width and up to 10 meters in height.

"Wind Attribute Magic" is what causes the wind, so experiments up to Mach 3 are possible.

Observers are protected by the "Windshield Boundary", so it is possible to observe them at close range, but they are usually observed by a dedicated "Magic Eye".

"I devised the air circulation, but it seems to have worked."

Yes, Marika.

In order to blow the wind, in the enclosed space, the wind side becomes negative (lower atmospheric pressure) and the wind side becomes positive (higher atmospheric pressure).

To prevent this, an air suction port was provided on the underside of the wind, and the air was circulated to the upper side of the wind to blow out, enabling more efficient operation of the wind tunnel.

A similar technique is used in the "sealed propulsion engine", even though it is a snake foot.The position of the suction port is different... (abbreviate the details here).

"Now we can design and build better aircraft."

While recalling the "plane race" that took place the other day, Malika murmured.



Shu was the first to use the wind tunnel.

By winning the final match, he gained the right to use it first.

I'd like to try it quickly.

The second one is Rubina, so I'm participating in the experiment with Shu.

There is also a reason why I want to see Jin's advice with my own eyes.

They started the experiment in the form of an observation from a dedicated booth.

Well then, I'll go.

Shu, who set "lightning" in the wind tunnel, turned on the "blower" switch.

A weak wind blows out.

It is a system that increases the wind speed by pushing up the manual lever.

Shu slowly raised the lever.

Wind speed 5 meters... 10 meters... 15 meters... 20 meters...

I haven't turned the plane into a fine motion yet.

Wind speed 30 meters 40 meters 50 meters 60 meters.

Minor vibrations occurred at the tip of the blade from a wind speed of 70 meters, or approximately 250 kilometers per hour.

"Um, at times like this... when I'm illuminating a short wavelength of light and looking through a modulation filter..."

Generally, the shorter the wavelength, the easier it is to refract.

Therefore, there is a device that can observe the state of air by irradiating electromagnetic waves of short wavelength.

It's not a naked eye, it's a dedicated optical device.

"Ah, there's a great vortex at the tip of my wing....."

Overcooling... Sometimes airplane clouds can occur from the tip of the wing as the plane flies through the atmosphere containing water vapor that does not freeze even below freezing point.

This is presumed to be due to turbulence in airflow at the tip (tip vortex or backward vortex) and the stirring of the atmosphere, resulting in supercooled water vapor freezing.

"Jin-san said you might want to break the tip of your wing or bend it up."

"Hmm. I thought I said 'Winglet' for folding..."

Vortex formation means that the energy is consumed, and by reducing it, it can be expected to increase fuel efficiency and speed.

Then the wind speed increased, and from the time the wind speed exceeded 100 meters, or 360 kilometers per hour, slight vibrations (flatters) began to occur on the horizontal tail.

"Oh, it's the turbulence behind the main wing and the horizontal tail in it."

Jin-sama was right.

"Yeah. Fifty centimeters or sixty centimeters, tops or bottoms."

Ultimately, the wind speed exceeded 200 meters... and the experiment was carried out at an equivalent speed of 800 kilometers per hour.

Hmm, I can tell from this.

Wind tunnels are handy.

"Absolutely. Now we're going to experiment on Rubina's plane."

Yeah, fun.



"Ah, ah, ah... what a turbulence!"

Rubina's "Nile IV" was a delta wing with turbulence occurring from the leading edge of its main wing.

Now, Nile IV receives the wind at a large elevation angle and is looking at its behavior at takeoff.

"Um... it's like 'leading edge peeling vortex'."

Rubina murmured as she looked at the aerodynamics guide you put together. [M]

"... this is increasing lift... I see."

The same goes for Shu.

Initial knowledge of aerodynamics is based on what Jin learned in the process of modeling, academic books brought in from the original world by the "Sage (Magus)" Shuki Tsezi, and the rules of experience from countless experiments in Penglai.

"Hmm... airflow around the vertical tail is not very favorable either."

Vertical tail provided on the back of the torso.

It was well understood that the torso, including the canopy (wind protection), was suffering from turbulence caused by the air currents created by the accessories.

There is turbulence in the lower half of the vertical tail.

"You know what it means to have two vertical tails."

"Yeah... after all, wind tunnel experiments make sense."

Shu and Rubina were surprised that the shortcomings of the aircraft were clear in this short time.

"It's much faster than building, flying and improving..."

"Absolutely."

Shu said he wanted a dedicated wind tunnel.

"If it's for a one-tenth model, I think I can make it myself...."

"In the case of models, Jin-san said it's different from the actual machine."

"Yeah."

Hydrodynamic theory around here is difficult and Jen doesn't understand.

In extreme simplicity, the atmosphere at one atmosphere is "stickier" than the actual machine, compared to the miniaturized model.

In other words, "easy to float" can be said to be "resistant".

"Aerodynamics" is necessary to match these parameters, but it is a challenge beyond engineering universities.

Nonsense.

"If you hit it roughly with a small model, it would be good to use a real model here in the wind tunnel to verify it."

That's what it's gonna be like.

"And if we repeat the experiment, one day we will be able to sublimate to theory."

Yeah, that's right.

It was Shu and Rubina who thought it might be a contribution to the world.