Orton's plan brought about new changes to the upgrade of Thunderhawk City.
According to Orton, the reason his armed Sky City plan had repeatedly failed was because the magic energy technology at the time couldn't meet the requirements of the plan. And what exactly were his requirements? Simply put, to add weapons to Sky City.
This weaponry could mean installing magic energy cannons with extremely long ranges on the city, or directly transforming Sky City into a floating mothership-like large combat platform. In short, to turn Sky City into a huge weapon of war, akin to a moving fortress, so that it could be fully engaged in actual combat.
While this idea was undoubtedly good—otherwise the Magic Energy Research Institute wouldn't have originally supported the plan and invested so much into it—people soon discovered, after numerous trials, that no matter what level of armament was applied to Sky City, it couldn't get around a major problem: the city's power supply was insufficient.