Chapter 567: Flower Bomb!

Neverwinter City, the outskirts of the western city wall.

The huge roar attracted many people to climb up the city wall to watch. The First Army has already blocked the entrance to the Misty Forest to prevent anyone from breaking into the test site.

Although the location is far from the city wall, you can still clearly see what happened here with a telescope. It seems that in the future, we will have to find a remote place as a dedicated arms testing base, Roland thought.

"Your Majesty, the second round of launch is ready!" The artilleryman reported.

"Everyone go into the bunker," he beckoned, "Make sure no one is there before counting down."

At the same time that the 152mm howitzer is being tested to study the magic stone symbol, Roland has not let go of the improvement in thermal weapons. Now that Timothy had been destroyed, the Northland had declared its surrender, and the situation in Greycastle was in good shape. He had time to settle down and make a new round of improvements to the shells.

But I have to say that the technical difficulty of howitzers with trigger fuzes is several levels higher than that of solid bullets. Anna would hand-make four shells for testing every day. As a result, after three days in a row, none of the shells exploded successfully. Even during the test the next day, one of the shells exploded as soon as it came out of the chamber, causing the tubes of the new artillery used for the test to be crooked in half. Fortunately, Roland was well prepared and dug a few trenches around the test site to prevent accidents, so no casualties were caused. As for the eardrums of the soldiers closest to the artillery, Nana also healed them in time.

"Can this thing really explode when it touches the enemy as you said?" Agatha stood in the trench and couldn't help stepping on her feet to look around, "I asked Anna, it's just made of a few pieces of metal, and it's not life body, how can you tell if the opponent is an enemy?"

She is considered to be the most active witch in the alliance for weapon testing. After learning about this, she put aside the production of the chemical plant for the time being, and came here to observe the research progress of the new shells.

"It doesn't explode when it touches the enemy, but when it falls into the enemy's position," Roland corrected, "This is also a requirement that the howitzer must meet. If there is no insurance to ensure this, the shell may go off at any time. Too dangerous."

The trigger safety is the core technology of the new shell, and it is also the focus of the test.

In order to avoid accidental explosions caused by collisions and falling off, he painstakingly set up a total of three insurances.

Firstly, the fuze is stored and transported separately from the shell, and it is not installed on site until it is used. The fuze is shaped like a cone with a handle, about the size of a fist, and its tail is threaded. When installing, it can be screwed into the notch on the top of the shell, which is quick and easy. convenient. Since the shells are filled with double-based chemical gunpowder, it is difficult to detonate without a detonator, which fundamentally guarantees the safety of logistics work.

Then there is the inertial safety in the fuze.

It is similar to a door lock. Under normal conditions, it is supported by a hard spring and cannot move. When the shell is fired, the huge inertia will make the lock cylinder recoil, thereby overcoming the resistance of the spring to pull the latch and release the second safety.

The principle is very simple, but it is not easy to implement. The first two days were basically spent on it. If the spring is too hard, the lock cylinder will not be able to recede enough. If the spring is too soft, it will not be safe enough. The test firing situation was adjusted slowly, and a more reliable spring compression data was obtained after six rounds of tests.

The last insurance is the centrifugal detonator device.

It is also the most technical thing in the fuze. To put it simply, the detonator is embedded in a semicircular iron plate the size of a coin. It usually stands in the center of the fuze in an inclined shape and is fixed by a spring. At this moment, the firing pin, detonator, and propellant are not in a straight line. Even if the shell falls from a height, the firing pin cannot touch the detonator, avoiding the risk of misfire. Only after the locking teeth of the second insurance are out of the lock position, the iron plate is in a movable state.

Due to the effect of the rifling of the barrel, the grenade will spin at a very high speed after being fired. Under the action of centrifugal force, the inclined detonator will gradually return to normal, similar to a spinning top, with the center of gravity moving closer to the central axis. This process is completed about two to three hundred meters after the chamber is released. In this way, even if the muzzle is blocked or covered by branches above the head, the warhead will not explode in advance.

When the detonator is fully aligned, it forms a straight line with the firing pin and the activating charge. Once the fuze touches the ground, the firing pin will plunge into the detonator, and then use the activating charge to drive the high-heat gunpowder jet into the warhead warhead. , tearing the surrounding enemies to shreds.

The advantage of the centrifugal insurance is that if the shell misfires, the detonator that lost the centrifugal force will be pushed back to its original position by the spring, and it will become tilted again, so the recovery work is much safer.

In addition, if the entire grenade is captured by the enemy or picked up by accident, it can only be used as a solid shell if it cannot obtain sufficient centrifugal force when it is fired in a conventional way. As for taking apart the imitation, it is even more impossible.

"Get ready to launch, count down to five times!"

The observer issued the password.

The fuse that had been lengthened several times was slowly tightened, and the gunner hiding in the trench retracted the rope little by little.

"Fire!"

As the soldier pulled violently, the ground trembled instantly.

The violent muzzle wind swept over the heads of everyone at the scene with the roar, and Roland felt many tiny soil particles rolling into his collar. Even if you plug your ears tightly, you can still feel the tremors from the soles of your feet.

"Observed drop point, no explosion, repeat, no explosion."

The sound of lightning came from the listening sigil in Nightingale's hand.

"Understood, let's go there right away." She took out another magic stone and replied.

"... Did you fail again?" Agatha couldn't help but feel a little frustrated.

"When we are groping, failure is a very normal thing," Anna comforted, "Once we find the right direction, we can ensure that there will be no more failures in mass production."

"That's right," Roland patted her head approvingly, "and now with the assistance of Asha and Sylvie, the progress of this research and development is astonishingly fast."

In future generations, thousands of rounds of grenades will not be a big deal in the stereotype test. Finding problems within two or three grenades is tantamount to fantasy.

Arriving at the position where the warhead landed, Anna cut off the fuze with black fire to ensure that the warhead was safe and sound, and then the soldiers took away the waste bombs, whether it was gunpowder or metal bullets, they could be reused, so naturally they should not be wasted.

"Asha, it's your turn." Roland gestured to her.

"Yes, Your Majesty," she nodded, and used the replay ability, and instantly a phantom of a cannonball that was about to fall to the ground appeared in front of everyone.

Axia's magic power level is still low, and after several months of training, she can only support four playbacks, but through precise control of magic power, she is now able to freeze the replay at a certain moment.

And this playback is a perfect replica of the scene. In other words, Sylvie's perspective can see that the inside of the phantom is indistinguishable from the real scene, except that it cannot be touched.

This is how Roland solved the problem of spring strength with only eight rounds of shooting. u