>Reading a scifi novel
>They refer to am arbitrary "range" for a spaceship
>No mention of Delta V
Let us discuss the silly things in scifi, and suggest good hard scifi.
Once you have the technology necessary to create interstellar craft (which is what almost all the craft are in the cases you're describing), dV doesn't matter. You won't have to fuck around with orbits, you can just go right in to your destination.
Besides, the relevant metric isn't "what change in velocity can your starship effect", it's "how long can your ship survive out in the wild and what's the maximum distance it could travel in that time." There will be a maximum safe velocity for any craft and a maximum safe acceleration, so the maximum range is the distance you can reach given maximum acceleration to maximum velocity, traveling as far as your craft's resources can sustain you, and then decelerating at your destination.
Maybe I'm just autistic but this is the reason I refuse to indulge in many movies shows and shit. I mean I really enjoy horror and supernatural shit, specially Lovecraft because it's supposed to be about things beyond our comprehension or that we simply can't explain/understand, but most sci-fi just triggers me because it tries to pass off its shit as not-magic and doesn't even try to make it consistent.
>because it tries to pass off its shit as not-magic
no, it tries to pass its shit off as a plot device
if you go into a movie created for entertainment and expect to be given an accurate lecture on scientific phenomena then you've misunderstood the point of watching a movie
Im reading the Eon series by Greg Bear. Not the hardest of sci-fis but has some interesting concepts and ideas.
Also Solaris by stanislaw lem which is more of a philosophical book but also very good. Some mindfuck and horror themes
Ship takes off from planet, just kind of flies away from it at a quick but steady speed like gravity is constant regardless of distance from planet.
Often even more problematic is the huge amount of potential energy the ship has gained in what appears to be a near trivial task of breaking orbit. Made more glaring when some other setup fails to have enough power to function.
>Sure we got enough power to break solar orbit, but you are taking about powering a toaster to toast TWO slice of bread at once and we just don't have that kind of power supply.
Extra deductions for just hovering there like gravity and tons of metal don't attract with out any signs of support.
>No mention of Delta V
Real space ships don't run on ancient physics.
This sort of shit scifi only really occurs in hi-tech fantasy novels, like Dune and stuff.
Legit science fiction either takes into account real space travel, or uses something so far advanced that the technology might as well be magic, avoiding the need to publish fucking papers on how it works to satisfy autistic nerds like you.
There is a guy in omaha trying to build a ship that would behave exactly like a ufo, being able to accelerate absurdly fast and avoid g forces acting on the occupants. Its probably a dead end, but it still makes me smile to imagine him succeeding and seeing the shitstorm it would unleash
Hey now, no need for name calling. I mean I accept a mass nullifier, so long as it does not violate thermodynamics. I am sure someone could make work within those large limits, no detail blueprints required, although a scaled sketch is nice.
Presumably, "range" is how long it takes for the crew-supporting consumables to run out, or possibly how long it takes for half the consumables to run out so the other half can be spent returning.
You could even construct a distance-based maximum range: At full thrust burning half of your delta-V, how far out will you get before you exceed half of the maximum mission length? Or: Starting at Earth, what is the farthest circular orbit you can reach with a Hohmann transfer before you either exceed the maximum mission length or run out of dV?
Other factors limiting mission length besides life support and energy: radiation exposure, low-gravity health effects, mental stress due to insufficient long-term habitat accomodarions, maintenance, cryogen boil-off...
Or perhaps it's a craft reliant on beamed power, and thus has a maximum range based on beam range, or depends on solar wind or solar power and thus has a maximum range from the Sun.
It doesn't make sense to construct a distance based scaling on dV. If you burn half your dV, there's no guarantee you can get back; if you burn more, there's no guarantee you can't. Once you reach solar escape velocity all bets are off as far as distance- so anything with a dV above a threshold has effectively limitless range, but can perform only a few maneuvers. Time based dV would make the most sense since oxygen filtration, food, and crew morale are some of the most limiting factors.
You wouldn't usually call circularization of an orbit a "hohmann transfer" because that implies change of sphere of influence (transfer between two planets, etc.)
That's what I was talking about, though. Burning half your dV gets you up to a certain velocity; your time-based range then gives you a distance based on that.
Why use a distance-based range at all? So you can say things like "This spacecraft can reach Mars orbit from Earth, but doesn't have the range to reach Ceres"
It really depends
Excess power/fuel enough so that you needn't even bring it up when talking about your "range"
Outside of the bounds of gravitational bodies (say, waking up from deep space sleep)
Difference forms of propulsion, such as atomic rockets, where you'd measure what you can do with how many nukes you have combined with other factors like dV (it'd be a whole new equation)
Anti-gravity/reactionless drives, which follow their own laws; say needing a gravitational mass to push against or needing specific quantities of solar energy for whatever you need to do
So on and so on.
you faggots are paranoid, the government would get the largest boner of all time if they could start claiming new planets in the name of the USA. We would go from superpower to absolute hegemony, and the people making the ships and setting up the trade routes would become wealthy beyond comprehension.