Well, failure is the mother of success.

Not once, wipe your sweat and do it again.

For today's test firing, Rand prepared very well, preparing five rounds of artillery shells for the test firing alone, and this is also a day and night rush to produce all the stocks.

According to the situation just now, the power and scope of the explosion were not much different from the estimate, but the deviation in direction was somewhat serious, but this result was expected by Rand for a long time.

The premise of all weapons to cause a destructive strike is to hit the target.

As a long-range weapon, the accuracy of rockets and artillery is precisely the most important point, and if the tail fin is manufactured without accurate data drawings, if it achieves a precise strike at one time, it will be a hell of a disaster.

"It's really head-turning!" Rand scratched his head in annoyance, the data of the tail fin included the value of breaking the wind resistance, plus the distribution of its own weight and the stability of the warhead, there could be no top-heavy or light-headed phenomenon.

Rand pulled out the folded blueprints from his bosom, pulled out one of them, shook his head, and threw it into the brazier beside him.

"Next!"

The sound of the wind breaking, and the second rocket launcher was planted headlong into the dirt pit in front of it shortly after takeoff, except for splashing a layer of dust and gravel, it did not play any role.

"Looks like this won't work either......" Rand burned a drawing again.

As the third rocket was ignited, the hearts of everyone present were lifted, and the rocket was successfully ignited and launched, but it rushed straight into the sky overhead in the eyes of everyone.

Under the expectant gaze of everyone, the rockets that lost power began to fall.

The little black dot in everyone's eyes grew bigger and bigger until a cool breeze blew......

"Lying ...... ......!" Rand's pupils narrowed sharply, and his hands and feet were cold.

"Boom!"

As soon as Rand brought his body close to the ground, a loud noise suddenly sounded in an area less than fifteen meters away.

For a moment, Rand only felt that the sky was spinning, his head suddenly became blank, there was a buzzing sound in his ears, and the world suddenly seemed to be as quiet as only his own existence, and even the ground under him shook in that moment.

Rand didn't dare to look up, only saw the flash of the fire fleeting, black smoke slowly rising, and mud and clods of dirt fell on his body.

When the aftermath of the explosion was gone, Rand stood up and found that everyone had come out of hiding, compared to Rant, who was protected by two knights, who was much better, the soldiers who carried the shells were covered in dust, and Versailles threw himself headlong into the kang beside him, almost buried under the clods of dirt that had been lifted.

Fortunately, there were no casualties.

The explosion site of the rocket projectile landing was originally a flat ground, but now it has become a crater with a diameter of half a meter.

Thinking of the explosion just now, Rand couldn't help but feel a chill in his heart, fortunately he dodged in time, if the explosion point was closer, I am afraid that he would not be able to retreat with his whole body.

If you get killed by a weapon you made, it's a big joke.

"Big ...... My lord!" Van Sailes was visibly frightened, "This thing's whereabouts are so weird, if it were placed on the battlefield, I'm afraid it would cause us more damage than the enemy, right?"

"In the pursuit of truth, there are always some detours. Rand took a deep breath, patted the dirt off his body and hair, and ordered, "Keep testing!"

However, the fourth rocket did not deliver the results Rand wanted, and even worsened than the third.

It's blown up......

After the fourth rocket was ignited, the fire flashed, but suddenly an explosion came from the barrel.

Almost instantly, the barrel with a wall of only three centimeters was seriously deformed, and at the location of the explosion point, the exit of the barrel cracked several penetrating wounds, thick smoke rose everywhere, and the barrel was also shaken out by a strong force, deviating from the fixed position by more than ten meters.

As for the others, they were already stunned.

"How is this possible?" Rand frowned, in order to prevent the rocket from backfire inside the bomb and cause the bore to explode, Rand specially set up a device similar to a one-way valve in the passage from the combustion chamber to the warhead, in the case that the gunpowder in the combustion chamber is not burned out, only through a strong collision can the valve be opened, and the flame is introduced to ignite the * in the warhead, but in the barrel, the rocket and the bomb are not subjected to a strong impact, how can the bore be exploded?

Versailles wrapped the still warm barrel in cloth, and after making sure that there would be no further explosion, he separated the broken * body with a hammer and placed the separated * in front of Rand.

No anomalies were found on the projectile, which had been burned black by the heat and flames, and because of the explosion, the projectile was already in a broken state, and if it had not been for the barrel charging to tighten it, the entire gun body might have been reduced to fragments.

"Rub it with a brush and steel......," Rand thought for a moment, thinking that the problem might be with the combustion chamber and the valves connecting the channels.

Rand's tools were quickly delivered, and as the steel rubbed off the black ash on the shell little by little, revealing the original color of the bullet body, Rand used a brush to finely dust off the fine dust, revealing the wall of the valve between the warhead and the combustion chamber.

Rand poured water down the valve, carefully looked at the other end, and after about four or five minutes, no water spilled down the valve, indicating that there was no problem with the tightness of the valve itself.

So, what's the problem?

Rand looked at the projectile and suddenly seemed to think of something.

He instructed the soldier to pick up the cartridge casing, and he himself took the bucket and filled it with water at the same time, along with the valve and the partition wall, and when there was no longer any more water in the cartridge case, Rand lowered his head, and with the help of the bright midday sun, he saw that at the other end of the partition wall, a drop of water was slowly condensing and flowing down the cartridge case.

Rand, who was an automotive engineering dog in his previous life, had tested the wheel hub and cylinder wall countless times, and he knew exactly what that meant.

Sand holes appeared on the projectile body.

Serious manufacturing process errors.

But in order to avoid such mistakes, Rand has already handed over the specific operation steps to the craftsmen of the smelting workshop.

The smelting of the steel has been personally audited by Rand, and there will certainly be no problems with the material.

Moreover, such delicate accessories and weapons and appliances need to undergo rigorous testing after molding.

Well, there's only one possibility.

Someone, dereliction of duty.

"......" Rand was expressionless, turned around and said, "According to the mark on the bullet body, find the person in charge of the workshop and tell him to let him get out of my way immediately!"