Chapter 279 Rifling "Whoosh", "whoosh", "whoosh", "whoosh", the shrill screams passed through the air, and then there was a series of sounds of heavy objects coming into contact with the ground, "bang", "bang", "bang", "peng", "bang", "bang" "Bang" and "Peng" can make people's hearts tremble.
In a target area 300 steps away, the enemy's formation was made of tree branches.
Three wide and long gaps were cut out by the high-speed rotating and jumping projectiles.
Sawdust was everywhere on the ground, and branches and leaves were flying everywhere.
"It's done, it's done, it's done."
Before the projectile could stop completely, Master Jiao Yu rushed over like crazy.
After a while, he came back panting and holding another projectile whose surface was ground into black, "Grand Governor, it's really done.
Three ricochet bombs appeared out of the four, and they hit the enemy's line fifteen No, ninety feet deep.
Every jumping projectile smashed at least four targets, and white wood stubble was exposed everywhere else hit by the projectiles."
"The effective range is 300, no, 1,800 feet, and the ricochet formation rate is three-quarters.
The governor is mighty.
He said that the rifling is useful, and it is really useful.
This copper-tired steel-core cannon weighs only fifty more than the original one.
Big catty, the effect, the effect has been more than doubled."
Not wanting to let Jiao Yu take the limelight alone, Huang Laowai also jumped up and added loudly.
Neither of them is very used to directly using a standard ruler to calculate length, so they always stumble when talking.
But the meaning expressed is very clear.
After adopting copper tire steel core and rifling technology, the artillery that can fire four kilograms of projectiles has been greatly improved in terms of power and range.
In particular, the ricochet formation rate is at least half guaranteed, instead of relying entirely on luck like before.
"Maybe more than double."
Huang Laoer, the artillery chief instructor, also emerged from the enemy's formation.
Walking to Zhu Chongjiu, he gave a military salute first, and then added loudly and professionally, "It turns out that artillery shells can also kill enemy troops at a distance of 300 steps, that is, 1,800 feet.
But at such a long distance, even if the formation is The ricochet can only hit two or three targets, and then it completely loses its strength.
But this time, basically as long as the target is hit by the projectile, there is no way to survive it.
The wooden shield three inches behind cracked into six pieces."
"Then pull the artillery farther and fire one round every 120 feet to see what the maximum range is."
Zhu Chongjiu first returned a military salute to Huang Laoer, and then ordered loudly.
"Yes," Huang Laoer agreed happily, commanding his subordinates to line up.
Push the artillery truck and move towards another artillery position one hundred and twenty feet away.
Unlike the craftsmen who are hard to change their old habits, they adapt very quickly to new weights and measures.
As a group of veterans, the concept of order and prohibition has already penetrated into the bones of each of them.
If your own governor says to use the Heavenly Ruler, just use the Heavenly Ruler.
There is no need for any reason, and they will not ask.
"Pay attention to the temperature of the artillery and the surface condition of the artillery.
The new projectiles are wrapped with soft lead, which may cause the chamber to explode more easily."
Zhu Chongjiu followed a few steps behind and reminded loudly.
After coating the projectile with a layer of high-purity soft lead, the cannon bore can be better sealed through the deformation effect of the lead, thereby forming a greater bore pressure, allowing the projectile to gain a greater initial velocity when it is fired.
But the disadvantage of this method is that the pressure and heat caused by the deflagration of the propellant are basically blocked in the barrel.
The possibility of a chamber explosion has also increased significantly.
However, after the artillery was changed to a steel core and copper tire, the suddenness and damage effect of the barrel explosion were significantly suppressed.
Because copper and iron have different expansion rates and heat transfer rates, once the barrel is damaged, the internal steel core and external copper tire will not burst at the same time.
Therefore, through temperature measurement and surface observation of the gun body, it is entirely possible for an experienced gunner to predict the degree of damage to the gun in advance and avoid tragedy.
Whichever is the lesser of two evils.
Compared with the useless lethality of the four-pound bronze cannon, Zhu Chongjiu would rather take a little more risk of exploding the barrel.
At least, the current copper-tired steel-core rifled gun can launch a two-kilogram solid projectile 450 meters away, and it can form a ricochet with a high probability.
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Although it was far from the red-coated cannon in his memory that "one shot could kill the enemy with no hope of killing the enemy, and it was corrupted for ten miles", it could still be regarded as a true primary artillery.
Unlike the original, it can only be regarded as a large musket at best.
Note 1 "Whoosh" "Whoosh" "Whoosh" "Whoosh" "Bang" "Bang" "Bang" "Peng" "Bang" "Bang" "Bang" "Peng" Just as he was thinking about how to improve the copper-tired steel-core cannon to meet the standards of the Franco aircraft in another time and space, a new round of test firings had begun.
Huang Laoer directed his elite gunners to fire two-kilogram projectiles into the preset target area at various angles, causing smoke and dust to billow in the target area.
The ricochet formation rate is still more than half, especially when launched at an elevation angle between thirty and forty degrees, it can even reach three-fifths or even three-quarters.
Because of the high-speed rotation, the kinetic energy stored on the projectile is also doubled.
Even if it falls on the ground and does not form a ricochet, it will roll at high speed in an unpredictable trajectory.
Cutting down the target people in the target area like straw.
But at the same time, the firing frequency of the artillery has also been significantly reduced.
It used to be almost once a minute, but now it takes nearly one and a half to two minutes to be ready, even if operated by the most skilled gunner.
The spiral rifling not only requires more effort when loading the projectile, but also requires the wooden handle of the rag used to clean the barrel to be pushed inward every time.
After firing, it becomes increasingly difficult to clean the barrel.
"The test firing at 1,900 feet is completed.
The ricochet rate is 60%, and the maximum penetration is 90 feet into the target area.
All are effective kills."
"Two thousand and forty feet of test firing completed.
The ricochet rate is 55%.
It can penetrate into the target area as far as 80 feet and the effective killing depth is 60 feet."
"Two thousand one hundred and sixty feet test firing completed, ricochet rate 40%, penetration into target area 70 feet" "Two thousand two hundred and eighty feet., ricochet rate" "Two thousand four hundred feet" Huang Laoer ran around with a leather notebook, constantly summarizing the data, and reported it to Zhu Chongjiu.
The maximum effective range is 2,600 feet, which is about 640 meters in another time and space.
The longest range is as high as 800 meters.
If hit head-on, it can still smash a three-inch thick board.
It just cannot form a ricochet and cause secondary damage, so it loses its meaning as an artillery shell.
In addition, the impact point of the cannonball has become easier to determine.
There is no longer a huge deflection under the influence of wind and other unpredictable external forces like before when there was no rifling.
If more than twenty copper-tied steel-core cannons are concentrated, it is entirely possible to carry out a covering strike on a specific area of 2,100 feet, which is 350 steps.
"What's the temperature of the gun body?
If possible, try a round of explosive shells.
Be careful not to press it too tightly."
Zhu Chongjiu nodded with satisfaction and continued to shout orders.
"Yes."
Huang Laoer saluted and ran away with long strides.
After a while, the pre-prepared explosive shells were stuffed into the barrel of the gun and began to bombard the target area indiscriminately.
The momentum of "Boom", "Boom" and "Boom" seems quite huge, but the effect is very average.
Cannonballs that use fuses to ignite can still easily misfire due to violent collisions when they land.
Moreover, after the cannonball lands, it does not explode immediately.
It always stays for a long or short period of time, and then suddenly jumps up, sweeping the area three or four steps away into a mess.
"If you run for your life when you see the projectile hitting the ground, you have at least a 30% chance of escaping."
Before Huang Laoer came over to report, the master craftsman Jiao Yu had already poured cold water on himself.
"If the lead is shortened as much as possible, the cannonball may have exploded before it can fly to the place, and it will not have any effect."
"Then let's keep it for the exclusive use of the six-pound cannon," Zhu Chongjiu thought for a while and casually ordered.
"When you go back, see if you can change the six-pound cannon to one with a copper tire and steel core, and add rifling."
Without a trigger fuse, the power of the explosive bomb cannot be effectively exerted.
As for how the trigger fuse was made, he could not find any impression in his memory of another time and space.
I only know that mercury fulminate may be used as raw material.
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The manufacture of mercury fulminate requires the use of concentrated nitric acid.
The manufacture of concentrated nitric acid involves the calcination of nitrate, or the reaction of sodium nitrate and concentrated sulfuric acid.
Concentrated sulfuric acid needs to be calcined with green vitriol, but he has no idea where the green vitriol comes from.
Talents are still needed.
In this era, it is easy to find scholars who can speak well, but those who understand the most basic knowledge of chemistry are probably only Taoist priests who make alchemy in the mountains.
And if we tie up all the alchemy Taoist priests from the entire Huaiyang area and teach them how to operate them step by step, the one who can successfully produce nitric acid will probably have to be only one in a hundred.
However, there is still a huge gap between nitric acid, mercury fulminate and trigger fuze.
It would be great if a two-way wormhole could be opened to connect with Zhu Dapeng's time and space.
Take any item here and it will be a priceless antique.
And if you bring anything over there, it can be called a divine weapon.
Two thousand Bayi bars plus twenty mortars are enough to sweep the world.
Why should I squat here and ponder over mercury fulminate and green vitriol oil?
"Um, change the six-pound cannon into a copper tire with a steel core.
My subordinate, my subordinates have already started to do it."
Knowing that his commander had a problem with his mind wandering, Jiao Yu stood aside for a while before responding cautiously.
"But, but, my subordinates believe that the top priority, the top priority, is to build a small cannon specially used to fire shotguns.
It doesn't need to shoot too far, it just needs to be able to kill targets within a hundred steps.
Use it in combat.
Use four-pound cannons to hit the enemy from a distance, and when the enemy gets close, use firecrackers and small cannons to bombard them, turning their archers into mere decorations."
"Scatter Cannon" Zhu Chongjiu was slightly startled, and then the clouds on his face were swept away.
Yes, although there is no way to get a trigger fuse in a short time, I can definitely get another great artifact, the Crouching Tiger Cannon.
That was another time and space.
Qi Jiguang and his old man's trump card against Japanese pirates was to wipe out a large area at close range.
Even the firecrackers among the Japanese pirates could only flee, let alone ordinary bows and arrows.
Thinking of this, he no longer worried about being unable to make a fuse, and grabbed Jiao Yu's shoulders tightly with both hands, holding the other person grinning, "Make it, just go ahead and make it.
No matter how much money you spend, make it as soon as possible."
Get it out for me.
It doesn’t take a hundred steps, as long as the effective killing distance is fifty steps, which is more than three hundred feet, I will give you a credit."
Note 2 Note 1: The range of the Fo Lang machine in the middle and late Ming Dynasty varied greatly due to different models.
But the basic effective range is more than 600 meters.
As for "one shot, the enemy will be killed without any calculation, and the enemy will be destroyed for ten miles", it is purely an exaggeration by the literati.
In the era of black powder, there is no possibility.
Note 2: Tiger Crouching Cannon, a small shotgun improved by Qi Jiguang when he was campaigning against Japanese pirates.
According to the calculation of the unearthed objects, the caliber is 57mm and the barrel length is 423mm.
It can fire one hundred projectiles weighing five cents.
According to records, the range is as high as more than a hundred steps, which is more than 150 meters.
But the effective range of the gun should not be that far.
If black powder is used to launch it, it should be between 80 and 120 meters
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