Towards evening, the magic lantern had been lit in the Avery command center, and the staff assistant was transcribing the battle report information onto the blackboard. Pen & Fun & Pavilion www.biquge.info

When it was seen that "17 armed tractor formations returned safely to the border post, there were no casualties...... Destroy 2,147 enemy troops", Cynthia and Lisa both looked at Donner with surprised eyes.

"Secret weapon ......" Donner smiled at them, then deliberately avoided their eyes, got up and walked to the window, looked at the scene of the industrial area where night was about to fall, and suddenly sighed: "I haven't moved for more than ten years......

"Isn't it the right time?" replied Lisa with a sneer, her tone rather dissatisfied, probably because Donner was hiding some secret weapon from her.

Donner looked back at her and said defiantly, "Together?"

"Not interested. Lisa shrugged her shoulders with a bored look.

Donner smiled helplessly, he knew that if he didn't make this secret weapon clear today, Lisa would not cooperate with him.

"It all starts with your trebuchet......"

Downer then goes through the causes and consequences of his own design of the horn cannon.

More than three years ago, the day he saw Lisa fiddling with the giant catapult, Donner was inspired: the giant catapult can be thrown at a distance of more than 1,400 meters, so why not use it to drop biological weapons?

As a result, the Misty Academy has been tasked with studying chemical weapons ever since.

Since then, Donner has rejected hundreds of poison schemes, ranging from highly toxic potions recorded in potions books to simple chemical products such as hydrochloric acid, sulfuric acid, aqua regia, hydrogen sulfide gas, and so on.

These solutions are either limited in effectiveness, fatal to the soil environment, or extremely difficult to produce and preserve.

That is, until Pino and Doris, who combined classical potions and modern chemical products, to configure, a powerful anesthetic called Nightmare Breath.

As long as ordinary people inhale a little nightmare breath, they will hallucinate, laugh maniacally, and then fall unconscious, but not fatally. In this way, even if there is a leak, the consequences will not be too serious.

In addition, the chemical properties of Nightmare Breath are very unstable, and after encountering air and soil, it will oxidize and decompose within a few minutes, and the damage to the soil and air environment is almost negligible.

However, this extremely unstable chemical property also poses a great challenge to the preservation of chemicals. Even one of the ingredients for Nightmare Breath, Grimace Psychedelics, is itself a magic potion that is relatively ineffective.

In this situation, Downer took a different approach and designed a perfect biological weapon system, and the horn cannon was one of them.

In fact, as early as the day the horn player's liquid nitrogen cannon began to be developed, it was clear to Donner that it was impossible to reach the power of the Earth cannon with liquid nitrogen to propel the projectile. You must know that the general boring pressure of cannons must reach hundreds of megapascals, and the ultimate membrane resistance pressure of nitrogen is only 17 megapascals, and there is an order of magnitude gap between the two.

Therefore, Donner's purpose in designing the horn cannon was not to value the lethality of its shells.

He filled three pharmaceutical raw materials and a copper oxide catalyst into a tin pharmaceutical capsule in precise proportions, and then filled it into the belly of a hollow cannonball, using the low temperature generated by the liquid nitrogen capsule to stabilize its chemical properties.

When the liquid nitrogen shell accelerates in the barrel and the friction barrel produces high temperatures, the tin capsule begins to melt, and the shell rotates at high speed along the rifling line of the barrel, mixing the three agent raw materials and the copper oxide catalyst thoroughly. Seconds later, the shell hit the ground, the alloy warhead deformed, and the nightmare breath gas, which had just completed its synthesis reaction at high temperatures, erupted.

In other words, each horn player's alloy cannonball is a well-structured potion synthesis tank. The liquid nitrogen used to create a low temperature environment and ensure the stability of the raw material can be used as a propellant, and the vibration, high temperature and rotation of the shell during firing provide the ideal environment for the synthesis reaction.

After listening to this narrative, Cynthia was already impressed, but Lisa sarcastically said nonchalantly: "Obviously trebuchets can do it, why is it so complicated?"

She was probably afraid that Donner would think she didn't understand, and added: "Put the potion in an iron pot beforehand, roast it on the fire, shake it, and then throw it with a trebuchet, isn't it the same? You can throw more and farther at once!"

"I didn't say no, but there are a lot of factors that you don't take into account. Donner smiled slightly, "First of all, Nightmare Breath is a kind of gas, its diffusion speed is limited, even if you use dozens of kilograms of raw materials to make a large jar, within a few minutes, the gas in this jar can only diffuse to a few hundred meters away, you know, after these few minutes, Nightmare Breath will be invalid......"

Lisa snorted in shame, but didn't defend herself.

"We have done diffusion experiments with gases of similar nature, and 190 grams is the most economical unit dose, and after the raw materials of the potion in a nightmare bomb are fully reacted, the nightmare breath produced is almost this number. Donner continued: "Also, what you said about roasting and vibrating the reactor requires human involvement, and if someone participates, there is no guarantee of accuracy and no accidents...... Therefore, I prefer to put all the complex processes into production, and when used on the battlefield, the whole process does not require human intervention, which is the simplest, safest, and most effective. ”

"That's the wisdom of engineering!" exclaimed Cynthia.

Lisa probably thought Cynthia was making a fuss, gave her a disdainful look, and then said to Donner, "Since it works so well, are you still in a hurry to move your muscles?"

"There's bad news," Donner shook his head helplessly, "the Nightmare Bombs have only been produced in total, and more than seven thousand will be used this afternoon, and there is not much left." ”

Although Lisa had a hard mouth, she couldn't help frowning when she heard this.

"There's another piece of good news...... Donner smiled, "now the chemical plant is attached to the military factory, and it is at full capacity, and it won't be long before the supply will be stable." In addition, the long-range version of the reinforced horn hand cannon has also been put into production at the machine factory, and it will be rolled off the assembly line in batches as soon as tomorrow afternoon. ”

"So, you're going to buy some time?" asked Lisa thoughtfully.

Donner nodded, looking at Lisa with a grin, waiting for her response.

"I want that recipe. Lisa held out her hand.

Cynthia looked at Lisa with some concern, and then at Donner, in her opinion, the less people could master this vicious weapon, the better.

"You can't figure it out even if you have a recipe. Donner said.

Cynthia breathed a sigh of relief.

"It's not the kind of care you need. Lisa replied-for-tat.

"Then I have one condition. Donner said: "Within a month, those white robes under your command will be at my disposal." ”

Cynthia pursed her lips, her intention to oppose Donner's approach, but she also knew that she was not qualified to open this mouth now.

Lisa was silent for a moment, then smiled and said, "If you send them all to die, wouldn't I be at a loss." ”

"How about I'll take a step back, three times?" Donner gestured to a three.

"Okay, that's it. Lisa smiled victoriously and got up and said, "Let's go!"

Donner looked at her suspiciously.

"Don't you want to move your muscles?" Lisa smiled, "I'll accompany you on a trip, this one, it's free." ”