Date: Wed, 2 Feb 2011 17:41:23 -

Author: --- Paul Nord

Subject: Re: Methane and Flammable Smoke Rings?

Post:


--Apple-Mail-1-555303862
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii

I thought that too.

They were careful to refer to the torch as map gas. And it looks like a =
glassmaking shop... or some kind of casting shop. I'd bet that they =
know their torches. You can get methane torches that look very much =
like the one they were using. I'd expect to see two control valves on =
an oxyacetylene torch. That one seems to have just one lever.

Paul


On Feb 2, 2011, at 5:12 PM, John Welch wrote:

> In the youtube airzooka video - it sure looks like they are using =
acetylene or oxygen+acetylene. And they use a map gas torch instead of a =
candle.
> -John
>=20
> Chuck Patten wrote:
>>=20
>> or try super-chilling the base of the tube to make the mixture more =
dense
>> for better range and cohesion of the gas ring...
>>=20
>> cheers,
>> chuck...
>>=20
>> -----Original Message-----
>> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] =
On
>> Behalf Of William Beaty
>> Sent: Monday, January 24, 2011 7:09 PM
>> To: 'tap-l@lists.ncsu.edu'
>> Subject: Re: [tap-l] Methane and Flammable Smoke Rings?
>>=20
>>=20
>>=20
>> Propane in Airzooka
>> http://www.youtube.com/watch?v=3DgFiJo18YYZA
>>=20
>> Tilt it until the last second so gas doesn't all escape.
>> Perhaps add smoke, for easy tracking.
>>=20
>> On Mon, 24 Jan 2011, Matt Lowry wrote:
>>=20
>> =20
>>> A colleague and I were just testing out our new big smoke-ring =
cannon,
>>> which works beautifully (thanks for all the advice last spring, =
btw).
>>> But in the process we wanted to see if we could make flammable
>>> methane-rings, so we sprayed some methane gas into the cannon & =
fired it
>>> at a lit candle, but the rings didn't flame up. We knew they hit =
the
>>> candle from the fact that it flickered, and we tried a variety of
>>> proximities but nothing worked.
>>>=20
>>> =20
>>=20
>> (((((((((((((((((( ( ( ( ( (O) ) ) ) ) =
)))))))))))))))))))
>> William J. Beaty SCIENCE HOBBYIST website
>> billb at amasci com http://amasci.com
>> EE/programmer/sci-exhibits amateur science, hobby projects, sci =
fair
>> Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird =
sci
>>=20
>>=20
>> =20
>=20
> --=20
> ******************************
> John Welch
>=20
> Cabrillo College Physics Dept.


--Apple-Mail-1-555303862
Content-Transfer-Encoding: 7bit
Content-Type: text/html;
charset=us-ascii

I thought that too.They were careful to refer to the torch as map gas. And it looks like a glassmaking shop... or some kind of casting shop. I'd bet that they know their torches. You can get methane torches that look very much like the one they were using. I'd expect to see two control valves on an oxyacetylene torch. That one seems to have just one lever.PaulOn Feb 2, 2011, at 5:12 PM, John Welch wrote:

In the youtube airzooka video - it sure looks like they are using
acetylene or oxygen+acetylene. And they use a map gas torch instead of
a candle.
-John

Chuck Patten wrote:

or try super-chilling the base of the tube to make the mixture more dense
for better range and cohesion of the gas ring...

cheers,
chuck...

-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of William Beaty
Sent: Monday, January 24, 2011 7:09 PM
To: 'tap-l@lists.ncsu.edu'
Subject: Re: [tap-l] Methane and Flammable Smoke Rings?



Propane in Airzooka
http://www.youtube.com/watch?v=gFiJo18YYZA

Tilt it until the last second so gas doesn't all escape.
Perhaps add smoke, for easy tracking.

On Mon, 24 Jan 2011, Matt Lowry wrote:



A colleague and I were just testing out our new big smoke-ring cannon,
which works beautifully (thanks for all the advice last spring, btw).
But in the process we wanted to see if we could make flammable
methane-rings, so we sprayed some methane gas into the cannon & fired it
at a lit candle, but the rings didn't flame up. We knew they hit the
candle from the fact that it flickered, and we tried a variety of
proximities but nothing worked.




(((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
William J. Beaty SCIENCE HOBBYIST website
billb at amasci com http://amasci.com
EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird sci





--
******************************
John Welch

Cabrillo College Physics Dept.



--Apple-Mail-1-555303862--

Back