Moreover, with humanity's current productivity, it could absolutely build other Star-Class Warships while construction began on the New Flagship.
As for when construction would begin, that would have to wait until other technologies matured as well. Things like Real Shield and Tachyon Weapon would definitely be standard equipment.
However, technological development was always full of coincidences. The technologies humanity most wanted to achieve as soon as possible had yet to materialize, while other technologies that had not originally been development priorities appeared first.
Repulsive Force Field Technology was one such example.
Originally just one branch of force field research under the framework of the Theory of Everything, it unexpectedly became something humanity developed first. It had been discovered during research into the mutual repulsion between Negative Matter and ordinary matter.
The emergence of this technology allowed humanity's New Warships to hover directly within planetary environments, much like Anti-Gravity.
If a spacecraft equipped with this technology traveled within a planetary environment, it performed just like one equipped with an anti-gravity device. It could use a repulsive force field to fly freely through the planetary environment without needing any thruster assistance.
Viewed from the perspective of gravity, this technology was essentially the Anti-Gravity Technology that often appeared in science fiction films.
Yes, Anti-Gravity Technology had emerged so naturally. As a derivative technology, humanity had not even deliberately researched it.
This technology sounded extremely advanced, but to humanity now, it was merely so-so. Even when installed on spacecraft, it would not be used often, since humanity's large warships rarely conducted planetary landings.
It was far more useful for small vessels, especially those Probe Spaceships that frequently needed to land for exploration.
Of course, Planet-Class and Star-Class Warships would not forgo installing it just because of that. It would always come in handy someday.