Super Invincible Battleship
Chapter 450

Chapter 450: Chapter 219: The 4th upgrade_2 Chapter 450: Chapter 219: The 4th upgrade_2 The drone, after a data refresh, could fly at top speed for 5 hours, reaching a terrifying distance of 18,360 kilometers. Of course, this is only the theoretical maximum flight distance. In reality, because Yan Fei utilizes Quantum Radar and the Auxiliary Brain, and since the drone needs to evade radar detection by submerging underground, encountering the resistance of seawater and withstanding its pressure, all these factors would heavily drain the drone's Energy Points. Therefore, the drone's maximum distance would not reach 18,360 kilometers, but would in fact be shorter.

The straight-line distance between Shanghai and Misty Island is 3,000 kilometers. If the drone were to actually fly back and forth between Misty Island and Shanghai, after each data refresh the drone could at most make two round trips, which equals 12,000 kilometers.

Based on this efficiency, for Yan Fei to transport all 24,000 tons of Upgrade Materials from Shanghai to Misty Island, he would need to make 15-17 round trips between the two locations. According to the calculations above, this would require 8-9 days. However, Yan Fei had already put in so much effort to upgrade the drone, even facing a life-and-death crisis when snatching the Upgrade Essential Items. Now, it was just a matter of long-distance material transportation without any risk, at most a matter of spending some time. Compared to previous hardships, the current situation was much easier for Yan Fei; such a duration was certainly tolerable for him.

Tonight was Yan Fei's first long-distance transportation of materials, so he collected a portion of Special Alloy and timber from Universal Space, filling the entire 1,000-cubic-meters Universal Space. Then, Yan Fei contacted Nie Sanfeng and with his help, he quietly left the Company.

Yan Fei cautiously arrived at the Shanghai seaside and began to summon the drone hidden in the offshore waters, then took the drone and submerged at high speed towards Misty Island. Along the way, the drone was very careful; it chose to travel underwater within China's territorial waters. Once it left these waters, it surfaced and flew in a seskimming manner at low altitude. Approaching the First Island Chain, to evade radar detection from the US Forces and Japan's army, the drone submerged again. After passing this dangerous area, the drone resurfaced for another round of seskimming flight.

Switching between flight modes like this, a little over an hour later, Yan Fei arrived at Misty Island on the drone. Hovering in place above the island in the Misty Island Sea Area where the gold was stored, Yan Fei jumped down from the Drone Cockpit and found that the gold he had previously stacked on the island was intact.

Actually, Yan Fei was a bit worried about leaving so much gold out in the open on a desolate island. However, fortunately, the batch of gold did not encounter any issues, which gave him a sigh of relief. Then, he began to take out the Special Alloy and timber from Universal Space, and stacked them next to the gold. Since the island was very narrow, with a total area of just a few dozen square meters, Yan Fei used the gold and Special Alloy as two walls on both sides of the small island, to ensure that all the Materials would fit, especially to prevent the round timber from rolling around and falling into the sea.

After completing all this, Yan Fei boarded the drone again and began to return to Shanghai, then proceeded with the second batch of material transport. By the time Yan Fei delivered the second batch of materials to Misty Island and returned to Shanghai, the drone's Energy Points were almost depleted. Then, Yan Fei waited in the Warehouse for a while until it was midnight in Shanghai, and the drone's data began to refresh. The drone instantly regained its ability to move, and so Yan Fei redoubled his efforts and made another two round trips between Shanghai and Misty Island that same midnight, transporting a large amount of materials to Misty Island.

In the following days, the Special Alloy and timber that Yan Fei had purchased were successively delivered to the Warehouse. Then, he moved them to Misty Island with the same perseverance of an ant moving house. Because of Yan Fei's extreme caution and Nie Sanfeng's help, no one knew that Yan Fei, who was normally working during the day, would continuously sortie at night, and in such a short period of time, he had moved so many materials to Misty Island, 3,000 kilometers away from Shanghai.

That night, after Yan Fei transported the last batch of materials to Misty Island, all the Drone Upgrade Materials were finally ready. At this point, all the preparations for the drone's upgrade were complete. After a long wait, the drone was about to undergo its most important Upgrade.

Because the island was very narrow, Yan Fei had no grounding and could only stand on the high pile of Upgrade Materials. Yan Fei took out three Upgrade Essential Items from Universal Space–rusty chains, rusty discs, and round beads–and placed them at his feet.

Looking at the Drone Upgrade Materials that had been collected with great difficulty, Yan Fei felt extremely excited, even the thick fog that perpetually shrouded the island suddenly seemed endearing. Looking at the F-15-shaped drone suspended above his head, sudden feelings of attachment washed over him.

The F-15-shaped drone had a powerful Combat power, allowing Yan Fei to truly possess the capability to confront the world's top Forces and had brought him countless glories. In the continuous fierce battles, although the drone defeated countless opponents, it also became battered and even shattered into pieces on several occasions. If it hadn't been for the drone's automatic repair upon each data refresh, the F-15-shaped drone would be covered in scars. Like the scars on a man's body, these would have been the proud marks of the F-15-shaped drone's Merit, but unfortunately, there was no evidence to witness these achievements, which left Yan Fei with a hint of regret.