"Tick, tick"

Cold sweat seeped out of Da Lang's head, gathered on his chin, and after trembling slightly, he finally couldn't resist the earth's gravity and fell on a puddle of water stains on the ground, but the water stains expanded much faster than the volume of sweat.

He watched the other party pick up arrows and draw his bow, so he subconsciously crouched on the ground and hugged his head, closed his eyes tightly, and then whistling arrows flew over his head and in his ears with the sound of wind and tremors.

When the last arrow grazed the roots of his children and grandchildren and nailed them into the ground, and the shaking tail feathers repeatedly touched a certain position, Da Lang only felt a heat in his lower abdomen, and opened the gate uncontrollably to release water.

"Just because you can't do it doesn't mean others can't do it, idiot!"

If on Freez's territory, Lao Qin would definitely shoot this guy to death, but the police were by his side, Mia still couldn't believe it, so he had to scold and scold and return the other party's words.

"I'm an idiot!

Da Lang was frightened, he spoke with a crying voice, the cold wind blew, and the wet part of the urine was cold, five arrows!

Mr. Officer breathed a sigh of relief.

If Ibrahimovic is shot, he will have to perform his duties and be arrested. But since it didn't hit - there are so many people who like to die, maybe this is a consensual performance?

I don't know if Ievic believes it or not, but he Barry Brown believes it!

......

Da Lang left in embarrassment, and the three of them didn't want to stay here, especially the big officials, who were always worried about a walker wearing a tiger skin and holding a whistle stick from nowhere.

"Qin, what kind of competition are you going to participate in?"

"Traditional bow tournaments, recurve bows and compound bows are not interesting, relying too much on equipment will only degrade the shooter's skills, and my specialty is rapid-fire, not accurate shooting. ”

“...... Chinese people are always so modest. ”

"It's not modesty, it's true. Lao Qin made the action of opening the bow and scattering it, "It's accurate because I shoot too many times, and it's not good if I exceed twenty meters, and the weight of my bow is not enough." ”

"Then why don't you change it?"

"Laminated composites weren't for me. As you can see, I can do four arrows a second at the fastest, and the bonded pieces can't stand up to too much speed, and the center of gravity is not suitable. ”

"You're right. Barry Brown nodded, "However, if you're willing to spend money, you can actually consider nitinol, and I've seen a laser-cutout, carved into a micro-spring stack that should work for you." ”

The scumbag is dumbfounded, can the bow piece also be kryptonite?

......

Nitinol is a shape memory alloy that returns to its original shape when it is formed at a certain temperature, no matter how it is changed, when it reaches the forming temperature again.

When humans first landed on the moon, Apollo 11 used this thing for its antenna.

Not to mention the corrosion resistance, it is higher than medical stainless steel, "only ash, no rust" is what it says, and the reason why Barry recommends using it to make bow blades is because of its high damping and super elasticity.

Damping, simply understood, is vibration damping.

The faster the rate of fire and the greater the force, the greater the impact of vibration, so modern composite bows have Ryze shock absorbers on the bow arm, alpha shock absorbers on the bow blades, blocking rods and bowstring silencers on the bowstring.

The damping coefficient of nitinol alloy is 10 times higher than that of ordinary springs, so the bow made from it basically does not vibrate, which greatly improves the accuracy.

When an object is deformed by an external force, an interaction force is generated between the parts of the object to resist the external force and try to restore the object from the deformed position to the pre-deformed position.

This force is called "stress" and is the root cause of the bow's elastic force.

However, if the external force on the object exceeds the limit that it can bear, it will deform or break, and this limit is called the elastic limit in materials science.

When the external force exceeds the elastic limit, the nitinol will also deform, but when the external force disappears, it will automatically recover again, which is called superelasticity.

Lao Qin's rate of fire is fast, the force requirements are strange, the one-piece bow is definitely not good, and the laminated bow piece can't withstand frequent pulling in a short period of time, so that he has to use a PVC pipe to make do with fiberglass.

There are no problems with alloy bows, and the fatigue life of nitinol is said to be 10 to the 7th power, which is 10 million times!

If, as Barry Brown said, using nitinol as a material, using laser hollowing out and then carving into a micro-spring stacked structure, the finished product is not only light and strong, but also can meet his needs.

Expensive is not a problem, no matter how expensive it is, can it be more expensive than his Steyr aug?

Coincidentally, the last time I received a call from a bow and arrow enthusiast, the bankrupt man was on his way to make money to support his family, and now he sees each other again, four of the six properties have been sold, and Qin Million still cares about these two jujubes?

Buy! Don't buy it, it's not people!

......

"Where to customize?" the two of them stared at each other like light bulbs.

"Do you have time today? I'll take you. Brown laughed, the guy who can buy a villa on Venice Beach is really not bad for money, like the Saudi tycoon, he doesn't ask about the amount, only the location.

"Okay. ”

Lao Qin agreed, and then looked at Mia with a smile, and said in his heart that you should leave now, don't you see that my brother has something to do? Unexpectedly, she didn't hear it, but winked at him mischievously, and took out a bottle of perfume from her bag.

You're ruthless!

He rolled his eyes and said no more, just follow it, it's better than her spraying pheromones on her body and seducing a substitute casually, Lao Qin is a little clean, and he will definitely not touch the bed partner again if he is with someone else.

The bow and arrow lover was very knowledgeable, and after taking it to the place and explaining the intention, he smiled meaningfully at the two of them, and told Lao Qin not to forget to look for him in two days, and then turned around and left.

It has to be said that modern craftsmanship is indeed far superior to traditional craftsmanship in some aspects.

The monomer bow (light bow) needs to go through the processes of drying, trimming, thinning, shaping (bow training), grinding, oiling and other processes from wood to finished product, and the laminated composite material is more complex, and it takes more time to wait for the adhesive to take effect.

Metal materials are different, the finished plate is directly engraved with a laser, cut out the approximate shape, then hollowed out, colored, and finally twisted with a bow opener, which takes about 150 minutes.

But waiting is always boring, so Mia starts wearing perfume again......

The girlfriend and sister were not there, and someone who was not in a hurry finally omitted the 10,000 words twice, and when he took the nitinol bow in high spirits, the girl was soft in the car and couldn't get down at all.

——————

This was Lao Qin's first feeling.

It's not like a bow made of metal, and when you put it on the electronic scale, it's 3.31 pounds, less than three pounds!

There are many problems with this product, and dense phobia is also one of them.

"Sir, if you are not feeling well, it is recommended that you use a bow garment. The staff pointed to the counter behind him, where rolls of plastic wrap-like objects of different colors were on it.

"Urban camouflage, help me wrap it up. ”

The elasticity of the bow is very good, which can not only cover the discomfort caused by the bow body, but also will not affect the performance, breathable and sweat-absorbing, and the staff will blow it with a hot blow dryer after careful winding, and the appearance will be flat and neat.

The studio is quite reliable, with a separate indoor shooting range.

Qiankun Audiobook .qktsw.

"Zheng"!

Lao Qin frowned and shot crookedly - the arrow was a commonly used training arrow, but he was used to the vibration of the broken bow, and at this time, he changed to a high-damping nitinol bow, and the feel was completely different.

"Zheng" "Zheng" "Zheng" "Zheng"

The staff was about to step forward, but he shot four arrows in a row, and after stopping, he was thoughtful. The pull did not increase, but the arrow flew faster, and the bow was fired continuously, and the hand holding it did not notice the vibration.

It was his second feeling.

"We used the latest Angeldyneema 777 (Angel String) as the bowstring, which increases the speed of the arrow, reduces vibration and noise, and is malleable. The staff explained.

Lao Qin nodded, and asked again, "What about the range?"

The breaking weight of the bow is low, the stress loss is also large, the training arrow flies out of 20 meters and begins to fall, even if the bow is added three times, the distance he can control the landing point is only 40 meters.

"The maximum distance that the existing Pound can throw in windless conditions is 210 meters, and the effective range is between 50 and 70 meters, depending on the arrow you choose. The other party replied.

"Existing pounds?"

"Yes sir, we have set a minimum tension based on your previous test data, and you can adjust the tension in this position, or of course you can go here and let me adjust it for you. He pointed to the bow.

"What's the maximum poundage?"

"One hundred and fifty pounds, I'm sorry, we have limited conditions here, and we can't calculate the maximum throw distance of this bow, which has an effective range of 182 meters. ”

"However, you must be reminded that for every pound of pull, the weight of the arrow needs to increase by 5 to 12 grains, otherwise the arrow will burst because it cannot withstand the impact, posing a threat to your safety. ”

Does it also matter?

Lao Qin nodded stunnedly, he was a rapid jet, and the explosion was like an automatic rifle, but the pulling force was really not large, and it was only 40 pounds after breaking the bow and adding three patches, far from the time to select arrows.

"Can you recommend one for me? preferably one that can be used over and over again. ”

The staff of this store is really good, not only did not despise him, but patiently popularized science.

"It is recommended that you do not use wooden or bamboo shafts, as their density is uneven, their accuracy is greatly affected, and they are prone to deformation in wet weather. ”

"Fiberglass shafts are prone to bursting, but the 40-pound pull you're setting is not beyond its reach, but it shatters if you hit a hard object. ”

"Carbon arrows are a good choice, with good straightness, no bending, no deformation, but they are as easy to explode as fiberglass, and its light weight makes it unsuitable for heavy bows. ”

"It is recommended that you use aluminum arrows or carbon aluminum arrows, they are very safe, but aluminum arrows are easy to deform, and are not suitable for small pound bows, carbon aluminum arrows do not have these drawbacks, but the price is high. ”

Speaking of this, the staff looked at him and consciously shut up.

Sure enough, Qin Million waved his hand: "It's a carbon and aluminum arrow, give it to me first...... 1,000 arrows, 10 arrow targets, humanoid half-body targets, is there an automatic arrow supply machine? ”

The other party is overjoyed, the local tyrant's father is so good!

......

"Mia, wake up. ”

Lao Qin gently rubbed the girl, the interior space of the Ford Mustang was not much larger than the booth on the second floor of the "Catwoman Bar", the window was only open a slit, and the strong smell of perfume made his heart beat faster again.

The girl muttered, slowly opened her eyes, her face still had the afterglow of the clouds, looked around to regain consciousness, and said softly: "How long have I been asleep?"

"About half an hour. ”

He lowered the window of the car and let the air form a convection, this girl should not take money, feelmore perfume is not ordinary expensive, every milliliter is green banknotes, she pours it well, she can spray it if she wants.

"I believe what you say now. ”

"Which one?"

"You're such a physical athlete. ”

“......”

The scumbag silently closed the car window.

......

Niu'er finally came to the bitter end.

After sending Mia back to school, Lao Qin, who was a thief, not only went to the dormitory for the first time to wash himself inside out, but also sent his Ford Mustang to the car wash.

Double the salary, the requirements are high, and you are not allowed to keep a single hair!

In order to cover up the smell of perfume, the goods even did a maintenance in the car, the leather was all washed and waxed, and then replaced with new cushions, so that Charlotte Holmes would have to go back crying when she came.

——————————

"Qin, Zhenquan is a boxing technique used in close-range grappling, you have to kick the ground quickly, rotate your waist sharply like me, and your arms should be close to your body, and the angle between your arms should be less than 90 degrees. ”

In the gym, Dunn is happily lecturing to his boss, naively thinking that the boss has finally realized his mistake and intends to devote himself to a great boxing career.

It's a pity that he thinks too much, this product is just a habitual loophole.

When Han Zhenkun proposed to accept apprentices on behalf of his father, the system released the task of "the head of a hundred schools", which was naturally intended to let the host learn the other party's Baguazhang and Xingyi Fist.

But Lao Qin Cai doesn't care what the system thinks, it's the right thing to get the reward in.

"Requirements: Learn at least one set of fighting techniques other than the existing boxing techniques, and practice to mastery", let's see, there is no requirement to learn any boxing techniques, right?

Is boxing a fighting skill?

You come out, spray three hundred rounds first!

Of all the fighting techniques, boxing should be the one with the fewest moves, and there are only five types of offense: jab, straight, hook, uppercut, and vibrillator (some people think that there are only straight, hook, and uppercut).

There are also five types of defense, blocking, blocking, dodging, dodging, and hugging.

There are still five types of footwork, sprint step, wrap step, side step, retreat step, and slide step.

Xiao Hei is a boxer, Lao Qin hired him to be a sparring partner for more than half a month, and when he rested, he had to discuss each other's boxing techniques with you and me, and occasionally followed a few strokes, which was not zero-based.

It's just that Dunn doesn't have such a good temper when he teaches Xiao Hei, Xiao Hei is honest, he does whatever he wants, and never asks why, so that he knows it but doesn't know why.

So Lao Qin was just one foot away.

According to the judgment of the system, even if the movements are accurate, even if you get started, all the movements are accurate and you can advance to mastery, with his foundation, even without the assistance of the dream world, a week is enough.

During the training break, he glanced at the task reward description:

"Forging Bone Ointment: Martial arts external medicine, fine iron forged into steel, supplemented by percussion after application, the medicinal power penetrates, and long-term use can enhance bone density. 」

"Knock?" Lao Qin had a bad premonition.

Still looking for "Recertification Peak" for free?

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