Ryan_m_b said:
I do quite a bit of worldbuilding, both solo and with other online groups. Some of it has been hard SF and yeah I agree, the spreadsheets do become key lol. The important thing, which I don't think GTOM is doing from what I see here and in other threads, is to firmly establish some core rules/characteristics and work outwards from there. Instead there seems to be a lot of jumping around, like the sudden introduction of a giant park on a spaceship rather than the consideration of what such a spaceship might have.
That is what i did when i calculated propulsion power requirements and laser melt through armor requirements. And finally reached the conclusion after i read about X-laser, that X proof mirror with human technology would be too much, so redesigned space battles to more like Age of Sail battles, since after a certain range, lasers won't make instant kill. That also resulted in considering my plan for final battle wouldn't be epic enough, that came with redesign ending.
Otherwise writing a good story means you don't only write things and events that have at least 90% plausibility based on everything we know, sometimes tech level has to be reverse enginered.
In the current example, that VIP is the son of construction expert megacorp's leader, if you have a significant share of asteroid belt's mines, you can build a fast ship with a garden.
Tech level : fusion reactors, delta-V of interplanetary ship on the order of 25-100 km/s, hybernation (a rather unpleasant experience), direct human-computer interfaces, cancer can be cured, but heal of nastier types is really expensive, powered battle armors, personal coilgun for heavy infantry (with infantry power sources and combat distances (atmosphere can also count) kinetics are still better), only one place has human level AI (it is rather a great manager than somewhat terribly creative)
New types of pwer storage i can think about : carbon nanotube capacitators, explosive flux generators, burn isotopes with a big alpha emission.
Robots are widely used, but usually they arent trusted to make important, military decisions, on a planet, automatization level is lower, due to different reasons (a rational reason is to be able to raise population without creating unemployment)