Re: [gundam] Re: 0080 Timeline Inconsistencies

Chris Beilby (
Tue, 23 Mar 1999 20:17:56 -0800

-Z- wrote:

> At 11:31 3/23/99 -0800, you wrote:
> >Dafydd writes,
> >
> >>Using the classic doubly-tangent Hohmann minimum-energy transfer orbit, it
> >>takes almost exactly 72 hours (3 days) to get from Earth orbit to Lunar
> >>orbit. In the Gundam universe, this means from Earth to the Moon, Luna II
> >>(L3), L4 or L5.
> >
> > Right, and about two days going back (thanks, I assume, to gravity's
> >helping hand).
> You're thinking of Apollo 11 and the other non-landers, which did indeed
> use the gravity-slingshot effect to speed up the return trip.
> Those who use lift themselves by their bootstraps into lunar orbit and take
> the old Lazy-S to Earth orbit are going to have the full 3-day jaunt ahead
> of them.
> >>Here it gets a bit tricky. L4 (Side 6) is in the same orbit as the Moon,
> >>60 ahead (east) of it. L2 (Side 3) is 60,000 km on the other side of the
> >>Moon from Earth. L4, Earth and Moon are equidistant from each other, but
> >>as noted in previous posts the delta-V is vastly different. I estimate 60
> >>hours (2.5 days) each way to get from Side 6 (Riah) to Side 3 (Zeon).
> >
> > I'd normally go for a rule-of-thumb estimate of two days, but I figure
> >I'd cut them some slack - after all, it only takes about 16 hours for the
> >Federation fleet to get from Solomon to the moon in 0083, though this is
> >hardly what you'd call a minimum-energy orbit (since they expend all their
> >propellant in the process). One assumes that, in case of emergency, you can
> >cut your travel time at least a little through reckless fuel consumption.
> I haven't seen the math on that 16-hour run, but it sounds damn close to a
> 1-g constant boost. How the heck would they decelerate at the end of the run?
> I could see the Zeon attack force high-tailing it back to Granada on a
> high-powered, narrow ballistic semi-ellipse. And Bernie only has to
> simulate the end of a standard run from wherever Agua Verde calls home on
> its manifest, so they could come in hot and fast and he'd decelerate all
> the way to Bunch 35.
> For that matter, Bernie's putative cargo could be perishables that warrant
> a high-speed run and he could legitimately claim he made the Kessel Run in
> under 8 parsecs....
> > In the case of 0080, the first Zeon attack seems to come in the
> >afternoon; by 3:30 PM of what appears to be the next day, Bernie's back at
> >Granada and his video has been analyzed. That's just a twelve-hour time lag
> >if the events are truly on consecutive days. Then the Graf Zepellin and its
> >escorts launch from Granada at 11:00 PM, attack Revo, and smuggle Bernie
> >and his cargo into the colony; Al comes across them in on what appears to
> >be the following morning (a weekend, so this too would be about a
> >twelve-hour time lag).
> >
> > By splicing in an extra day's travel time on both these occasions, we can
> >give the Zeons a day and half to make the trip from Granada to Revo. That's
> >less than you'd expect, but they _are_ in a hurry. ;-)
> >
> > One question: Wouldn't Bernie get a little tired of sitting in the same
> >space suit for 36 hours straight?
> No wonder the customs guy was so short with him -- Bernie was upwind of him!
> Since the Powers That Be shot a hole in his windshield you could ram your
> space-gloved fist through, all I can say is that Bernie had better have an
> airlock between the cockpit and the crew quarters or it's going to be a
> *LONG* trip!
> -Z-
> -
> Gundam Mailing List Archives are available at

  But then again, Bernie was launched from one of the cruisers. Surely, he would
have launched when only a few hours outside of Side Six space.

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