章 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.