However, new weapons are not so easy to develop, because there are too many issues to consider, and the materials used to make the weapons alone need to be carefully considered.

Energy crystals and secret gold are both precious and reusable resources. It is a huge waste to use them to make disposable weapons.

Therefore, Jiang Feng decided that meteorite iron and gemstones would be the main materials, but others also added that the bones of giant sea beasts could also be used as raw materials, and Jiang Feng agreed with this.

Mutated animal bones can also be engraved with runes and function, but due to the material, mutant animal bones cannot repeatedly withstand supernatural energy. Therefore, they are also good as disposable consumables, but they are a little more troublesome to make.

After deciding on the materials, Jiang Feng asked them to conduct a preliminary design. This time, the weapon was designated as a large cannonball. The "Far Away" would utilize ten times more rubies than the Rune Cannonballs to trigger an explosion simultaneously. This would be more powerful than ten Rune Cannonballs!

Of course, it is not easy to achieve this step. The trigger device must ensure that it can be triggered at the same time, and considering safety factors, it must be ensured that the shells will not be triggered accidentally when not in use, otherwise the victims may be their own people!

At the same time, in order to ensure the penetration and accuracy of the shells, additional runes need to be added to assist the shells to achieve the desired effect.

These are the basic issues. After understanding them clearly, the researchers began to conceive the basic shape of the cannonball, and then drew sketches to start designing. The diameter of the cannonball is 20 centimeters and the length is one meter. The internal gems are positioned in four bundles, with three rubies in each bundle, and a trigger device is separated between each ruby.

A sapphire propulsion device was added to the rear of the shell. As for other effects, the flower fairy needed to design runes, such as adding sharp runes to the front of the shell, adding wind runes and fire runes on the animal bone plate inside, and energy-gathering runes to become the power to propel the shell.

After the initial completion, it is necessary to set up insurance and add a trigger control part, and then start making the actual object. This step is under the responsibility of Jiang Feng, and the bones of the sea monster are processed by technical personnel. After it is basically completed, it enters the initial test stage.

Compared with the artillery shells, the launcher is much easier to make. A magazine is added to the back of a ten-meter-long cannon.

The cannon was moved to the top of the castle to prepare for searching for targets for experiments. After the turtle left the shallow sea area, it began to search for targets in the deep sea area.

Soon Jiang Feng saw a giant sea beast that was almost two hundred meters in size. This sea beast looked like a swordfish, but it looked more ferocious!

"That's it! Get ready for the test!"

"yes!"

"Anna, keep good records!"

"Yes, Master!"

"Prepare for launch!"

The cannon was aimed at the sea beast and fired immediately. After the trigger, the animal bone rune inside the cannonball was immediately activated. Then the sapphire turned into mist and was directly ejected under the effect of the rune, flying towards the sea beast at a high speed.

"boom!"

The shell then directly hit the sea beast and exploded violently, stirring up large pieces of flesh and blood, and directly blew a huge hole on the back of the sea beast, roughly estimated to be about ten meters in size.

The sea beast that was hit felt unbearable pain instantly and began to slap the sea water and flee into the depths.

Jiang Feng looked at the records carefully. The effect of this experiment was not as good as expected. After analysis, it was very likely that the ruby ​​was not triggered completely enough, that is, some gems caused the shells to explode before they were triggered!

"Keep improving! Until it meets your expectations!"

"yes!"

Everyone knows this, but it is somewhat unrealistic to expect success in one go. We can only improve it gradually through experiments.

The three rear air battleships returned, bringing back some gems and three hundred people, all of whom were recruited as logistics personnel.

At the same time, he also brought back news about the Yundian Fortress. Because Ji Yun left with the gem beast, the fortress was no longer hidden and had been discovered by some forces.

However, because the defense power of the rune cannon, electromagnetic cannon and laser cannon was greatly increased after they were completed one after another, those forces did not take any action for the time being. In addition, the appearance of the air battleships there also brought pressure to other forces.

Overall, the situation there is relatively stable. Zhongli has also started to train combatants there. The blood Jiang Feng left for her has been of great use, and basically most people have begun to favor her.

As for the others, they were just left there by Jiang Feng as whetstones. To win people's hearts, a gradual process of adjustment is needed. As for whether this process requires the sacrifice of blood and life, it depends on Zhongli's methods!

After Jiang Feng arranged these 300 people, he devoted his energy to research again. The heavy artillery shells were almost finished, and even the heavy cannons that fired the shells had undergone several improvements and various devices had been added to facilitate aiming and control.

After several tests, the heavy artillery's attack range is about ten kilometers. Because the main target of attack is sea monsters, it is generally not used.

During this period, the turtle obtained a lot of meat and grew bigger and bigger. Now it is almost five hundred years long!

After reaching this level, the turtle's strength also undergoes some significant changes. First of all, the earth and stone ability allows it to turn part of its body into rock, so that it can be immune to a large part of the damage. After being injured, it can also recover its body by absorbing rocks and energy!

Secondly, the mysterious patterns on its body surface have become more complex. Jiang Feng estimated that some other runes have been added. The type of runes is still unclear at the moment, but it is certain that its defense has increased exponentially!

This chapter is not over yet, please click on the next page to continue reading!