Re: Heavy Theory--gas pressure debate etc.

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• John, John, John, Thats a bit complicated. I said childs balloon,, sheesh! :):) Lets say measure 10000 inflated childs party balloons and calculate the mean,
Message 1 of 18 , Jul 1, 2001
John, John, John,
Thats a bit complicated. I said childs balloon,, sheesh! :):)
Lets say measure 10000 inflated childs party balloons and calculate
the mean, at a guess, I'd say they measure about, well you know,
about yea wide. Anyway enough that there is no interference with the
walls of the tunnel.
oriented and please forget gravity. I just stay in the centre of the
flow.
Today I cleaned up and parted in two, 16 Inter 3-7/8" dia pistons, I
can smell a melt coming on.
Hope you're able to get something done to your burner stuff.
Cheers
Terry

--- In hobbicast@y..., <info.host@b...> wrote:
> How big is this baloon in the first place anyway?
>
> John
>
>
> > Hi,
> >
> > I think in the 3-foot dia section, your baloon would become
longer,
> > more of a cylinder than a globe, to pass the neck.
> >
> > --- In hobbicast@y..., terrybrown@o... wrote:
> > > Hello everyone,
> > > So if I were a childs baloon and;
> > > If I were an ideal balloon(impermeable) and filled with an ideal
> > gas
> > > and I was in an ideal wind tunnel of say 6 foot diameter an I
was
> > > flowing along with the ideal flow I would be a certain size,
yes.
> > > Now the tunnel necks down to say 3 foot dia. I am now a bigger
> > > balloon than I was before,, yea!! and I am travelling faster,,
yea!!
> > > Or have I missed/messedup something?
> > > Cheers,
> > > Happy little Red (I like red, reminds me of inside my furnace)
> > > balloon.
> > > http://home.talkcity.com/cerfst/terrystuff/
> >
> >
> > http://budgetcastingsupply.com/
> >
> > The Home Foundrymen's Association website may be found here:
> http://members.nbci.com/HWilkinson/
> > It includes member project pages & links
> >
> > To unsubscribe from this group, send an email to:
> > hobbicast-unsubscribe@egroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
• Hi Donald, THANK you Donald. I think I ll have a nice cold beer now,, the stress is off. Cheers Terry. ... gas ... yea!!
Message 2 of 18 , Jul 1, 2001
Hi Donald,
THANK you Donald. I think I'll have a nice cold beer now,, the stress
is off.
Cheers
Terry.

--- In hobbicast@y..., dhl@c... wrote:
> That's basically it. In a nutshell or balloon skin, or something.
>
> Donald.
>
> --- In hobbicast@y..., terrybrown@o... wrote:
> > Hello everyone,
> > So if I were a childs baloon and;
> > If I were an ideal balloon(impermeable) and filled with an ideal
gas
> > and I was in an ideal wind tunnel of say 6 foot diameter an I was
> > flowing along with the ideal flow I would be a certain size, yes.
> > Now the tunnel necks down to say 3 foot dia. I am now a bigger
> > balloon than I was before,, yea!! and I am travelling faster,,
yea!!
> > Or have I missed/messedup something?
> > Cheers,
> > Happy little Red (I like red, reminds me of inside my furnace)
> > balloon.
> > http://home.talkcity.com/cerfst/terrystuff/
• What gas is the baloon full of? Kids don t like air ones but helium... now that s a different thing all together. Alex and I were going to rent a helium
Message 3 of 18 , Jul 2, 2001
What gas is the baloon full of? Kids don't like air ones but helium... now
that's a different thing all together. Alex and I were going to rent a
helium cylinder for a few days just for the fun of it. :)
A teacher my school keeps phoning the house while I'm on the internet trying
to tell me what books I need to take back for them. I must have called 5 or
so times and not been able to speak to them. Alex has been knocked off
course and his DT group has been home economics, the only good thing is that
he brings home lunch and can't say he doesn't now how to make anything. I
think I'll send him in with a picture of what I plan to do to see if any of
the teachers are willing to help. I sent off a job application to a DIY
store so if I'm VERY lucky a might have enough to buy one of those Smithy
(Read crap in CNC langauge) 3 in 1 machines. Be good enough for what I need
I suppose. A \$40,000 Bridgeport wouldn't go a miss though.

John

> John, John, John,
> Thats a bit complicated. I said childs balloon,, sheesh! :):)
> Lets say measure 10000 inflated childs party balloons and calculate
> the mean, at a guess, I'd say they measure about, well you know,
> about yea wide. Anyway enough that there is no interference with the
> walls of the tunnel.
> Oh,, PLEASE don't ask if the tunnel is north-south or east-west
> oriented and please forget gravity. I just stay in the centre of the
> flow.
> Today I cleaned up and parted in two, 16 Inter 3-7/8" dia pistons, I
> can smell a melt coming on.
> Hope you're able to get something done to your burner stuff.
> Cheers
> Terry
>
> --- In hobbicast@y..., <info.host@b...> wrote:
> > How big is this baloon in the first place anyway?
> >
> > John
> >
> >
> > > Hi,
> > >
> > > I think in the 3-foot dia section, your baloon would become
> longer,
> > > more of a cylinder than a globe, to pass the neck.
> > >
> > > --- In hobbicast@y..., terrybrown@o... wrote:
> > > > Hello everyone,
> > > > So if I were a childs baloon and;
> > > > If I were an ideal balloon(impermeable) and filled with an ideal
> > > gas
> > > > and I was in an ideal wind tunnel of say 6 foot diameter an I
> was
> > > > flowing along with the ideal flow I would be a certain size,
> yes.
> > > > Now the tunnel necks down to say 3 foot dia. I am now a bigger
> > > > balloon than I was before,, yea!! and I am travelling faster,,
> yea!!
> > > > Or have I missed/messedup something?
> > > > Cheers,
> > > > Happy little Red (I like red, reminds me of inside my furnace)
> > > > balloon.
> > > > http://home.talkcity.com/cerfst/terrystuff/
> > >
> > >
> > > http://budgetcastingsupply.com/
> > >
> > > The Home Foundrymen's Association website may be found here:
> > http://members.nbci.com/HWilkinson/
> > > It includes member project pages & links
> > >
> > > To unsubscribe from this group, send an email to:
> > > hobbicast-unsubscribe@egroups.com
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
>
>
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.nbci.com/HWilkinson/
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
• Why mess around with helium. Get a glass bottle, fill it halfway up with lye, stuff some crumpled up aluminum foil into it into the lye. then put a balloon
Message 4 of 18 , Jul 2, 2001
Why mess around with helium. Get a glass bottle, fill
it halfway up with lye, stuff some crumpled up
aluminum foil into it into the lye. then put a balloon
over the end and watch it fill up with hydrogen which
is half the weight (twice the lifting force) of
helium.

Watch out, the bottle will get hot. Don't use a metal
or plastic bottle.

LL

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• This might sound dumb but... lye? John ... http://members.nbci.com/HWilkinson/
Message 5 of 18 , Jul 2, 2001
This might sound dumb but... lye?

John

> Why mess around with helium. Get a glass bottle, fill
> it halfway up with lye, stuff some crumpled up
> aluminum foil into it into the lye. then put a balloon
> over the end and watch it fill up with hydrogen which
> is half the weight (twice the lifting force) of
> helium.
>
> Watch out, the bottle will get hot. Don't use a metal
> or plastic bottle.
>
> LL
>
> __________________________________________________
> Do You Yahoo!?
> Get personalized email addresses from Yahoo! Mail
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>
> The Home Foundrymen's Association website may be found here:
http://members.nbci.com/HWilkinson/
> It includes member project pages & links
>
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>
>
>
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>
>
• yes, lye. It can be found in every grocery store. It s also used to clean drains (draino) but I d buy the pure lye. It comes in a plastic bottle. but don t use
Message 6 of 18 , Jul 2, 2001
yes,

lye. It can be found in every grocery store. It's also
used to clean drains (draino) but I'd buy the pure
lye. It comes in a plastic bottle. but don't use the
plastic bottle for dissolving the aluminm into as the
mix will get hot.

greasy old aluminum foil will work. don't use shiney
make 1 cf of gas in a balloon.

Tape a bunch of garbage bags together to make a fake
UFO and try it out. You can tape tin foil to it so
it'll pop up on radar and they will scramble the jets
to intercept. don't tell anyone where you got the
info.

LL

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• Alkali, potassium hydroxide. B Dr Brian H Le Page Mechanical and Materials Engineering University of Surrey Guildford Surrey GU2 7XH +44 1483 300800 ext 2439
Message 7 of 18 , Jul 2, 2001
Alkali, potassium hydroxide.

B

Dr Brian H Le Page
Mechanical and Materials Engineering
University of Surrey
Guildford
Surrey
GU2 7XH

+44 1483 300800 ext 2439

-----Original Message-----
From: info.host@... [mailto:info.host@...]
Sent: 02 July 2001 15:31
To: hobbicast@yahoogroups.com
Subject: Re: [hobbicast] Re: Heavy Theory--gas pressure debate etc.

This might sound dumb but... lye?

John

> Why mess around with helium. Get a glass bottle, fill
> it halfway up with lye, stuff some crumpled up
> aluminum foil into it into the lye. then put a balloon
> over the end and watch it fill up with hydrogen which
> is half the weight (twice the lifting force) of
> helium.
>
> Watch out, the bottle will get hot. Don't use a metal
> or plastic bottle.
>
> LL
>
> __________________________________________________
> Do You Yahoo!?
> Get personalized email addresses from Yahoo! Mail
> http://personal.mail.yahoo.com/
>
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.nbci.com/HWilkinson/
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>

http://budgetcastingsupply.com/

The Home Foundrymen's Association website may be found here:
http://members.nbci.com/HWilkinson/
It includes member project pages & links

To unsubscribe from this group, send an email to:
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• aluminum foil into it into the lye. then put a balloon ... AND WILL EXPLODE ALSO where helium will not. Ask the Germans Larry Jackman
Message 8 of 18 , Jul 2, 2001
aluminum foil into it into the lye. then put a balloon
> over the end and watch it fill up with hydrogen which
> is half the weight (twice the lifting force) of
> helium.
AND WILL EXPLODE ALSO where helium will not. Ask the Germans
Larry Jackman
• Critical limits as per BOC s manual say it will need atleast 4.1% hydrogen to air to combust. Above 75% it will not burn. John ...
Message 9 of 18 , Jul 2, 2001
Critical limits as per BOC's manual say it will need atleast 4.1% hydrogen
to air to combust. Above 75% it will not burn.

John

> aluminum foil into it into the lye. then put a balloon
> > over the end and watch it fill up with hydrogen which
> > is half the weight (twice the lifting force) of
> > helium.
> AND WILL EXPLODE ALSO where helium will not. Ask the Germans
> Larry Jackman
>
> http://budgetcastingsupply.com/
>
> The Home Foundrymen's Association website may be found here:
http://members.nbci.com/HWilkinson/
> It includes member project pages & links
>
> To unsubscribe from this group, send an email to:
> hobbicast-unsubscribe@egroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
• ... Half the weight but not twice the lifting force. You have to compair the density of hydrogen to air and the densety of helium to air. John Grant
Message 10 of 18 , Jul 2, 2001
LLandstrom wrote:

> Why mess around with helium. Get a glass bottle, fill
> it halfway up with lye, stuff some crumpled up
> aluminum foil into it into the lye. then put a balloon
> over the end and watch it fill up with hydrogen which
> is half the weight (twice the lifting force) of
> helium.

Half the weight but not twice the lifting force.
You have to compair the density of hydrogen to air and the densety of helium to air.

John Grant
• ... Yep. We used to do that when I was a kid - lye, aluminum foil, in a bottle - but we screwed the top on and waited for it to explode. We weren t very bright
Message 11 of 18 , Jul 2, 2001
> This might sound dumb but... lye?
>
> John

Yep. We used to do that when I was a kid - lye, aluminum foil, in a
bottle - but we screwed the top on and waited for it to explode. We
weren't very bright - weren't doing it for scientific reasons. None of
them exploded, though (I guess the cap leaked), except once when a
friend kicked the loaded jar in digust and was lucky not to get hurt.

Doc
• It s about 1/4th the atomic weight but it s a double molecule so it s really 1/2 the weight. LL __________________________________________________ Do You
Message 12 of 18 , Jul 2, 2001
It's about 1/4th the atomic weight but it's a double
molecule so it's really 1/2 the weight.

LL

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• potassium hydroxide or sodium hydroxide? also known as caustic soda... Ken
Message 13 of 18 , Jul 2, 2001
potassium hydroxide or sodium hydroxide? also known as caustic soda...

Ken
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