Neverwinter, on the outskirts of the Western Wall. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

The loud roar attracted many people to climb the city wall to watch, and the First Army had sealed off the entrance to the Hidden Forest to prevent anyone from breaking into the test site.

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

"Your Majesty, the second round of firing is ready!" the artillery soldier reported.

"Let's all go into bunker," he beckoned, "and count down when you're sure there's no one." ”

Now it was the 152mm howitzer test firing - while studying the magic stone sigil, Roland did not let go of the thermal weapon improvement. Now that Tifeko has fallen, the Northland has been surrendered, and the situation in the Grey Keep is in good shape, he has also had the time to settle down and make a new round of improvements to the shells.

But it has to be said that the howitzer with the trigger fuse is several levels more technically difficult than the solid shell, Anna will make four shells by hand every day for testing, and the result is that for three days in a row, not a single shell successfully exploded, and even the next day during the test, one of the shells exploded directly out of the chamber, so that the new gun barrel used for testing was crooked in half. Fortunately, Roland was prepared and dug several trenches around the test site to prevent accidents, so that there were no casualties, and the soldiers closest to the artillery were shocked to their eardrums, and Nanava was cured in time.

"Can this thing really explode when it encounters an enemy as you said?" Agatha stood in the trench and couldn't help but step on her feet to look, "I asked Anna, it's just a few pieces of metal, and it's not a living body, how can you tell if the other party is an enemy?"

She was one of the most active witches in the alliance for weapons testing, and when she learned of this, she even put aside the production of the chemical plant for the time being, and made a special trip to observe the progress of the research of the new shells.

"It doesn't explode when it hits the enemy, but when it falls into the enemy's position," Roland corrected, "and that's what the howitzer has to meet – it's dangerous to have a shell that could go off at any moment without insurance to ensure this." ”

Trigger safety is the core technology of the new shell, and it is also the focus of testing.

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

First of all, the fuse is stored and transported separately from the shell, and is not installed on the spot until it is used - the fuse is shaped like a cone with a handle, about the size of a fist, and its tail is threaded, which can be screwed into the notch at the top of the shell, which is quick and easy. Since the shells were filled with double-base chemical powder, it was difficult to detonate without a detonator, which fundamentally ensured the safety of logistics work.

This is followed by inertial insurance in the fuze.

It is similar to a door lock, under normal conditions, it is held up by a stiff spring and cannot move, when the shell is fired, the huge inertia will make the lock cylinder recoil, so as to overcome the resistance of the spring to pull the teeth open, and release the second safety.

The principle is very simple, but it is not easy to achieve, and the first two days are basically spent on this - if the spring is too hard, the lock cylinder cannot recoil enough distance, and the spring is too soft and not safe enough, which can only be adjusted slowly by Anna according to the test firing, and after eight rounds of testing, a more reliable spring compression data is obtained.

The last line of insurance is the centrifugal detonator device.

It is also the most technical thing in the fuze, in simple terms, the detonator is embedded in a coin-sized semi-circular iron disk, usually standing in the center of the fuze in an inclined shape, and is fixed by a spring. At this moment, the firing pin, detonator, and excitation charge are not in a straight line, and even if the shell falls from a height, the firing pin will not touch the detonator, avoiding the risk of misfire. Only after the teeth of the second safety are out of lock, the iron disc is in a movable state.

Due to the rifling of the barrel, the grenade will spin at a very high speed after the rifling is ejected, and under the action of centrifugal force, the inclined detonator will gradually return to the center, similar to a rotating spinning top, and the center of gravity will move closer to the central axis. This process is completed about two to three hundred meters after discharge, so that even if the muzzle of the gun is blocked, or if there is a tree branch overhead, the warhead will not explode in advance.

When the detonator is completely centered, it forms a straight line with the firing pin and the excitation charge, and once the fuse touches the ground, the firing pin will plunge into the detonator, and then the hot gunpowder jet will be used to the warhead warhead with the stimulator, tearing the surrounding enemies into pieces.

The advantage of centrifugal safety is that if the shell is misfired, the detonator that has lost centrifugal force will be pushed back into place by the spring and tilted again, so the recovery work is much safer.

In addition, if the whole grenade is captured by the enemy or accidentally picked up, it can only be used as a solid shell if it is fired by conventional means, and if it does not obtain sufficient centrifugal force. As for dismantling the imitation, it is even more impossible.

"Prepare to launch, count down to five!"

Observers issue export orders.

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

"Fire!"

As the soldier pulled violently, the ground trembled instantly.

A violent muzzle wind accompanied by a roar swept over the heads of everyone on the scene, and Roland felt a lot of fine particles of dirt roll into his collar. Even if you block your ears, you can feel the tremors coming from the soles of your feet.

"The drop point was observed, there was no explosion, repeated, there was no explosion. ”

The listening sigil in the nightingale's hand soon heard the sound of lightning.

"Got it, we'll go over right away. She pulled out another magic stone and replied.

“...... Did you fail again?" said Agatha, a little frustrated.

"It's normal to fail when you're figuring it out," reassures Anna, "and once we've found the right direction, we can make sure we don't fail again when it's time to go into production." ”

"That's right," Roland patted her head approvingly, "and now with the help of Asha and Sylvie, the progress of this development is already amazing. ”

In the future, it would not be a matter of firing thousands of rounds in the finalization test of grenades, and it would be tantamount to a fantasy to find out the problem within two or three.

Arriving at the location where the warhead landed, Anna first cut off the fuse with black fire to ensure that the warhead was safe and sound, and then the soldiers collected the waste ammunition - whether it was gunpowder or metal projectiles, they could be reused and could not be wasted.

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

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

Asha's mana levels are still low, and she can only support four replays after months of training, but with precise control of her magic, she is now able to freeze the replay at a certain moment.

And this playback is a perfect recreation of the scene, in other words, Sylvie's perspective can see inside the illusion - it 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.