Dragonhelm,
*bows theatrically*
Check my site for my other Spelljamer art
http://www.silverblades-suitcase.com/sj/htm/spelljammer.htm
http://www.silverblades-suitcase.com/sj/squidship/nebula_view.jpg
On ship sizes:
yeah folk need to realize that fantasy does NOT =
dumb tech
Romans had some amazing tech for their era. Fantasy people, therefor, do not have to equal Iron Age in villages at the max typical.
Should always be what the DMs and players *see* the millieu as being.
We Humans have our mental conciets and limits. other races and especially with magic/psionic/deific powers, could come up with stuff we simply cannot concieve of.
This is a difficult thing for many folk to think of, but it's possible there could be discoveries in science in RL as well as art forms, we simply cannot see/grasp/create, purely because of our mindsets and limits.
Humans in OTHER universes may not be so limited, or have their own limits.
South AMericans were extremely advanced in many ways, but not in metallurgy, for example.
D&D example, in my home brew settings, there's a vast Roman-style EMpire using magic to help run it, it's legions armoured/armoured in adamantine (mined by condemend and dying slaves in horrible mines)...but, some places magic works different, some nations resisted them because the gods "said NO!"...etc etc. Places can vary highly. It's fantasy
Concerns for ships crew are leigt, from DMs perspective especially, but Spelljammer ships had smallish crews for several reasons, main one being *AIR!*.
No idea on how they'll handle the Astral Sea for air, but fire is certianly major bad mojo on a ship.
Weapons require crew...crew require food (food in Astral "Space"...load of space, but how much food? Big crews could starve...or be messed up by other factors)
In some ways I really do not like the "Points of Light" idea in 4th ed, it's fine for gritty campaigns, areas, but also doesn't jibe with many campaigns where sprawling empires, trans-planar conquests etc go on.
Which fit in great with Spelljamer and Planescape, however.
I see the Planes, and "space" as two different ways of getting to the same place, but the Planes are more dangerous and "weird".
We've just got a bad mind set that space HAS to = Scifi.
Jeesh, I can't stand a lot of scifi nowadays because it has become so damnably narrowminded, locked into ideas set by Star Trek and Star Wars. Great TV/film, but very, very bad for crippling how we percieve space travel.
My own bet for RL space travel is eventual discovery of antigravity and ships can be any old size/shape you want provided enough power, and they will not fly anything like Imperial Star Destroyers, lol, more like skimming around in any direction/acceleration you want as you're not locked into normal time/space, but your OWN time/space.
I'd imagine ships made by melting nickel/iron meteorites in space to form massive vessels who'se bulk would allow greater power, power generation being based on volume, larger ship = better.
Pardon the derail