

I’m pretty sure I’ve seen small (i.e., handheld-sized) commercial UAVs that fly like this. But as others have pointed out, at any realistic size you start to run into a lot of problems:
- The VTOL rotors will create massive drag when they’re not in use. There’s a reason virtually every aircraft with embedded VTOL jets engineered ways to cover them up during level flight. This cascades into a whole bevy of complexity issues.
- When you’re not using them, you’re lugging around 3 out of your 4 rotors for no reason.
- You’re also sacrificing a lot of internal volume for your lift fans. This isn’t so much a problem in small UAVs, again, but it’s not great if you were hoping to use that capacity for fuel or cargo.
So yeah, like others said as well - now that we have tailsitter drones of moderate size, there’s not really a use for this layout.
You’re basically asking about “Hard” and “Soft” science fiction.
For me, at least, I lean a little bit more towards the “Soft” (what you call ‘Fi’) side of things. But I’ve also always found this a little bit of a false dichotomy; a story can go fully fantastic and explain nothing about its spaceflight, but lean heavily on actual psychology or other social sciences to drive its characters; so is it “Hard” or “Soft” sci-fi? Turns out it doesn’t matter; it’s Sci-fi and if it’s a good story, then it’s good.
I also have to somewhat push back on the idea that Star Wars “doesn’t even try to explain” its tech. A lot of people put a good bit of effort into laying out how the technology worked, up to and including calculating the energy involved in things like Turbolaser bolts (turns out, it’s a metric shitton of energy).