Alt-BEAM Archive
Message #07320
To: beam@sgiblab.sgi.com
From: Senior kyled@cruzers.com
Date: Tue, 02 Nov 1999 22:28:26 -0700
Subject: [alt-beam] Re: aquabots - 'sealed' motor
Hey hey hey interaction with biological life!!! There's a biggy. Great,
so you got your robot to swim, what if you could get it to live with
fish, and got them to accept it?
Michael Hirtle wrote:
>
> If u have problems with alge u could get a alge eater and put it in the tank
> with your bots, but the bot may kill the fish
>
> Wilf Rigter wrote:
>
> > There was a post not long ago of a sub-bot that used wax heated through it's
> > solid/liquid phase to change the buoyancy.
> >
> > Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> > tel: (604)590-7493
> > fax: (604)590-3411
> >
> > > -----Original Message-----
> > > From: Bob Shannon [SMTP:bshannon@tiac.net]
> > > Sent: Tuesday, November 02, 1999 4:27 PM
> > > To: beam@sgiblab.sgi.com
> > > Subject: Re: aquabots - 'sealed' motor
> > >
> > > Wouldn't it be a lot more efficient to drive a bimetalic strip attached to
> > > a bellows?
> > >
> > > Store up power, then activate the ballast bladder, change depth, then as
> > > the
> > > strip recovers you return to your trimed depth.
> > >
> > > Asking the heat of a light bulb to change the density of a gas
> > > sufficiently to
> > > displace enough water to matter is not an efficient process.
> > >
> > > Benjamin Edward Hitchcock wrote:
> > >
> > > > ----- Forwarded message from Wilf Rigter -----
> > > > Using a light bulb to change buoyancy won't work since buoyancy is
> > > affected
> > > > by the displacement of water with a volume of lower density. So the
> > > rigid
> > > > glass bulb is the problem. A bladder filled with an incompressible
> > > substance
> > > > which changes volume and density as it is heated should work.
> > > >
> > > > alright!
> > > >
> > > > ---
> > > >
> > > > I love it! Using a lightbulb to change buoyancy! Fantastic! There is
> > > a
> > > > way to do this - put a partially inflated balloon around the lightbulb.
> > > > This will make the whole assembly watertight as well, and make a cool
> > > > coloured 'glow' when the device is on. Maybe you could use a magnetic
> > > > coil on the bottom of the cylinder attached to the mains, and have
> > > another
> > > > coil on the bottom of your bot. This would charge up a capacitor, and
> > > > coupled to a solar engine would make the bot sit on the bottom chanrging
> > > > up, then light its 'engine' and drift up to the stars!
> > > >
> > > > VERY elegant.
> > > >
> > > > Nice idea!
> > > >
> > > > Ben
> >
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7321 Tue, 02 Nov 1999 22:27:23 -0700 [alt-beam] Re: photoetching beam@sgiblab.sgi.com Senior Great thanks!
Kyle
Greg Powell wrote:
>
> At 08:32 PM 11/02/1999 -0700, you wrote:
> >Where are you getting your photo-sensitive PCB material?
>
> I got a photofabrication kit from M.G. Chemicals, a Canadian company based
> in Toronto, Ontario. I believe Radio Shack has a similar kit and boards.
> Greg
7322 Wed, 3 Nov 1999 08:17:22 +0100 Re: [alt-beam] Re: aquabots - 'sealed' motor alt-beam@egroups.com michael.hirtle@ns.sympatico.ca
If the bulb wa made 6km above sea leavel and was opened beside the wreck of
the titanic.................
Timothy Flytcher wrote:
> >hello,
> > > Depends. Some have gasses like Argon or Xenon in them (just to name a
> > > couple). Xenon is usually used for flash bulbs, though.
> > > Peace out!
> >
> >but there has to be some sort of under pressure. When i used a
> >little torch and heated the bulb, the almost melted glass went into
> >the bulb and formed something like stalactite.
>
> If the bulb was made in LA California and you opened it in Denver Colorado
> you would find pressure! the bulbs internal pressure is not a function of
> want... just cost... it if fare cheaper to make it at atmospheric
> pressure... or close...
> Timothy...
>
> ______________________________________________________
>
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