From: joshua geller (dclxvi_at_best.com)
Date: 02/25/98
Date: Wed, 25 Feb 1998 09:35:50 -0800 (PST) Message-Id: <199802251735.JAA15817@shell5.ba.best.com> From: joshua geller <dclxvi_at_best.com> Subject: Helios: zero mass balloon
C. McCoy writes:
> Hi Kevin!
> Funny, I never recieved the original post of this letter, at home or at
> work....Jim, can you check to see whats going on.
> Problem with this is creating a vacume chamber strong enough to maintain
> its area without collapse. You would need something like a submarine,
> but larger, and lighter.
and if you succeed, you don't get that huge of a win.
> Some of the new carbon compounds (C60) might be strong enough, but the
> as far as I know, c60 is RARE. They make it one at a time. Until mass
> production is figured out, It would be too expensive.
in other words: it is not possible to make the materials at this time.
> Close to vacume might be possible, but I am still doubtful. You can
> lower pressure considerably just by heating as Ken said. The molecules
> inside expand and leave. You just seal and tada! You have a low pressure
> chamber.
heh.
if the laws of physics were just *slightly* different, what a nice
world it would be!
josh
___
> > Kevin Christopher Lampo wrote:
> > >
> > > well it has been a long time since I have written to all of you so I will
> > > say hello...
> > >
> > > I, as I am working on a small hot air balloon, had a thought about lift.
> > > archimedies law says that the lift is calculated by the eq.
> > > l=(densityout-densityin)*gravity*Volumeofobject. now if the inside density
> > > could go, for hypathetical thinking, zero. then we would get max lift. so
> > > I ask you, is there a way to make a rigid body with a highly non-porous
> > > material and create a near vacume? Say on the ground a big suction unit
> > > pulled out the gas initialy to near weightlessness. then using thrust
> > > vectors, the craft could achieve lift, and forward thrust... think it
> > > over.
> > >
> > > "live well do good work, and as always keep in touch"
> > > Garison Kellor
> > >
> > > Kevin Christopher Lampo
> > > Kclampo_at_eos.ncsu.edu
> > >
> >
> > Nice to hear from you Kevin,
> > I thought I'ld post something I read along this thread a while back.
> > This was somebody elses idea. When removing the air the presure drops,
> > to avoid this add heat until presure is back to normal. Rinse and
> > repeat.
> >
> > Ken DeLacy
>
>
>