As for the "Viper Unmanned Combat Aircraft," there's more to say about it...

It belongs to the medium-sized unmanned fighter jets.

Length: 11.2 meters, Wingspan: 6.5 meters, Height: 3.08 meters.

Unmanned, it executes attack missions by inputting commands, can take off inside the train carriage, directly move from within the carriage to the last car before taking off into the sky.

Just...

"Hmm..."

Chen Mang silently looked at this production line. It's a good thing, but in what situation could it be used? His train itself can fly, and it flies much faster than this fighter jet. Instead of dispatching fighter jets, his train might as well fly out and perform a slaughter.

But it does consume Titanium Crystal Ore.

His Titanium Crystal Ore now has no use at all.

10,290,000 units of Titanium Crystal Ore are still quietly placed inside the train.

Let's upgrade and see.

He dropped 2,750,000 units of Titanium Crystal Ore to forge this component and instantly upgrade it to Level 10, obtaining the corresponding two Supermodel Effects.

-

"Viper Unmanned Fighter Jet Production Line Level 5 Supermodel Effect": Extended standby time with Solar Energy Panels on the fuselage. The absorbed energy allows the fighter jet to achieve infinite endurance, never landing.

"Viper Unmanned Fighter Jet Production Line Level 10 Supermodel Effect": Halves the consumption of cannon ammunition.

-

"Hmm...?"

Chen Mang's expression was slightly peculiar. It seems it's not entirely useless. The Level 10 production line can build up to a Level 10 Viper Unmanned Combat Aircraft, and the price for a single Level 10 fighter jet is 500,000 units of Titanium Crystal Ore.

Cheap.

Yes, his first impression was that it's too cheap!

The unmanned fighter jet built can be described as absolutely high attack and low defense. The primary source of attack comes from the four large-caliber cannons hanging below the wings, which require embedding Energy Stone as the attack source.

Level 10 attack strength, Level 1 defense strength.

And it only requires 500,000 units of Titanium Crystal Ore to get an unmanned fighter jet with Level 10 attack strength. What is there to criticize?

No way!

He hesitated a bit and decided to upgrade again. He suddenly felt this thing might be fun, consuming another 5,050,000 units of Titanium Crystal Ore to upgrade it to Level 20, acquiring new Supermodel Effects.

-

"Viper Unmanned Fighter Jet Level 20 Supermodel Effect": Halves the manufacturing consumption of the fighter jet.

-

Up to a Level 20 Viper Unmanned Combat Aircraft can be manufactured!

And a Level 20 Viper Unmanned Combat Aircraft, the building price is 500,000 Titanium Crystal Ore, and with halved manufacturing consumption, it's 250,000.

Chen Mang looked at the Titanium Crystal Ore balance.

"249,000."

Well, just short by one thousand.

He initially wanted to create one first to see its effect; with 250,000 Titanium Crystal Ore, he could build a fighter jet with Level 20 attack strength, and by mining a Level 4 Titanium Crystal Ore, approximately 10,000,000 units of Titanium Crystal Ore can be obtained.

Red-grade components can be upgraded to Level 20 at most.

This means any train that's Level 13 and has mined a Level 4 Titanium Crystal Ore can have a Viper Unmanned Combat Aircraft with attack strength of Level 20.

"..."

A strong sense of crisis swiftly overwhelmed him.

No way.

His armor is only Level 15, far from enough!

Level 15 armor is too weak; it must be Level 20 armor!

Just...

Why hasn't he seen other trains using this method in the "Stone Man region"? The "Grinning Train" is a Level 14 Mechanical Train, yet it doesn't use this method either.

Soon——

He figured it out; for the fighter jet to smoothly take off inside the carriage, two conditions must be met.

One, the train must be expanded, and expanded sufficiently large.

Two, it must have at least 150 meters of launch space.

If according to a 30-meter carriage length, roughly five carriages, he meets these two conditions; however, other trains seem to have difficulty meeting these conditions.

Once he understood this.

Chen Mang slightly relaxed, given a scare; he thought many trains in the Stone Man region had Level 20 attack means, almost making him unable to sleep at night.

However, he had to admit one point——

Which is the disparity between attack and defense!

Achieving Level 20 defense is so hard, yet Level 20 attack is so simple.

"Train Captain."

At this moment, Ai's voice came from the train room: "A single Level 20 Viper Unmanned Combat Aircraft poses no danger to the Fixed Star. Although the attack strength is Level 20, the defense strength is only Level 1, making it hard to breach the Fixed Star's firepower net, even if it dives at the Fixed Star. Moreover, that speed can't catch the Fixed Star."

"I know."

Chen Mang slightly squinted his eyes. He naturally knew this point. A single or two such unmanned fighter jets are not very meaningful, but if there are hundreds, it would be absolutely different.

Unless the anti-air firepower competes with Berlin's anti-air tower, it could generally sit and wait to get beaten.

It just requires a large amount of Titanium Crystal Ore to achieve this.

Just then!

Ai spoke again: "Train Captain, Mr. Li has returned. Someone inquired if they could use 'Titanium Crystal Ore', 'Red Heart Rock', or 'wood' to exchange for Fixed Star Coupon."

"Titanium Crystal Ore and Red Heart Rock are okay, but not wood."

"Understood."

Inside the train room.

Chen Mang looked at the screen on the control panel, a rather wild idea gradually emerged in his mind. The coolest point about this "Viper Unmanned Combat Aircraft" is sharing the max speed limit with the train.

Perhaps other fighter jets can't break through the Fixed Star's firepower net.

But his fighter jet's speed...

Will be impossible for anyone to lock onto unless there's firepower coverage.

The number of Doomsday Cannons is too few; over the long train span stretching hundreds of meters, 9 cannons are absolutely insufficient to cover. In the coming period, all his iron ore will be spent on defense and attack, to increase the train's foundation!

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