Fluid trade class errata

A thread of 3 messages, 17 February 1993 to 18 February 1993, in the order they were sent.

#5206 Fluid trade class errata

Fluid Trade Classification:
"Page 50, Step 6 (correction): Trade classifications, Fl line should be
Atmos A+, Hydro 1+, Size entry should be '-'."

This appears both in the sunbane errata and in the E&C published in
Challenge #36.

Mark

#5207 Fluid Trade Class & Ellipsoidal Worlds

Mark Watson [email removed] writes:

>Fluid Trade Classification:
>"Page 50, Step 6 (correction): Trade classifications, Fl line should be
>Atmos A+, Hydro 1+, Size entry should be '-'."
>This appears both in the sunbane errata and in the E&C published in
>Challenge #36.

Ooops. I wasn't even aware that the table was repreated on page 50.
When I looked at the sunbane errata, I was looking under page 25,
where it first appears in the ref's manual. Sorry. I guess I should
have been more thorough.

Still, I'm not sure that I entirely agree with the errata version
either. I'm wondering why Atmos is A+ instead of A-C, i.e. why should
atmospheres D, E, and F cause oceans to be non-watery?

I have another question about atmosphere type E. It assumes that
the world is ellipsoidal (egg-shaped?), and that therefore the
atmosphere pressures range from very high to very low depending
on where you are on the planet's surface (since the atmosphere is
still spherical) (see page 21 of ref's manual).

Two questions: Is this realistic? Would is also apply to the
hydrosphere? (if so, we could have a world mostly submerged but
with two ends jutting like mammoth mountains out of the water,
seems strange to me).


           _   /|       Jim Vassilakos
           \`o_O'       [email removed]
             ( )        [email removed]
              U         [email removed]
           Aachk!       [phone removed]

#5212 Ellipsoidal planets

[email removed] (james vassilakos) writes:

> I have another question about atmosphere type E. It assumes that
> the world is ellipsoidal (egg-shaped?), and that therefore the
> atmosphere pressures range from very high to very low depending
> on where you are on the planet's surface (since the atmosphere is
> still spherical) (see page 21 of ref's manual).

> Two questions: Is this realistic? Would is also apply to the
> hydrosphere? (if so, we could have a world mostly submerged but
> with two ends jutting like mammoth mountains out of the water,
> seems strange to me).

Since your center of gravity is going to be roughly at the center
of all three axes of the ellipsoid, yes, you will probably have
lower pressure at the ends of the ellipse than at the equator (I'm
assuming that the planet is elongated from pole to pole; anyone
who knows more about planetary evolution want to confirm or deny
that that's the most likely situation?). Just how significant
those differences would be would depend on the size of the planet.
And, yes, it would affect the hydrosphere, too. There probably
wouldn't be a whole lot in the way of equatorial landmasses.

- -- Tim Soholt ([email removed])