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simple stirling hot air engine made at home with simple tools ,2 cans a baloon - Page 5

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Posted by Mho on December 31, 2011, 3:33 pm
 
Ohhh Gawd!  More terrorist tips!


----------
I just stumbled onto this warning:
http://en.wikipedia.org/wiki/Pyrophoricity
http://en.wikipedia.org/wiki/Raney_nickel

jsw

--------------
I'm pretty well over my own head with this stuff. I've had some
serious help from this group. I've forgotten who, but someone was
insistent that I needed to get a copy of Steam Tables, ...




Posted by Jim Wilkins on December 31, 2011, 3:52 pm
 


Don't tell them about matches.



Posted by Morris Dovey on January 1, 2012, 4:44 pm
 On 12/31/11 9:33 AM, Mho wrote:


Y'know, I used to worry about that - then realized that "bad actors"
already had a fairly wide range of destructive options that didn't
require any expensive reagents or knowledge beyond that available to
everyone with a high school education...

This /could/ be used for destructive purposes, but there are so many
easier, cheaper ways to produce the same results that I don't think it's
worth the effort to worry over it.

--
Morris Dovey
http://www.iedu.com/Solar/

Posted by Morris Dovey on January 1, 2012, 3:50 pm
 On 12/31/11 9:29 AM, Jim Wilkins wrote:

Thank you - I read these articles with some concern for unintended
hazard, then began wondering if this might actually hint of some way to
/improve/ performance...

...and still haven't learned enough to know, but I've added the links to
my list of things worth learning more about.

I'm still planning to do initial testing with pure nickel, so
(hopefully) pyrophoricity shouldn't enter into the picture just yet.

--
Morris Dovey
DeSoto Solar
http://www.iedu.com/Solar/

Posted by Han on January 1, 2012, 8:37 pm
 @speranza.aioe.org:


I'm not an expert, but it seems to me that many "lower grade"* metals might
catch fire if sufficiently finely distributed - just as steel wool can
catch fire, and is sometimes used as firestarter.  However, under the
circumstances you might be using the nickel, I'd assume that there is no
oxygen, hence no fire hazard until you open up the containing device,
intentionally or unintentionally.

*  "lower grade" here means lower on the scale of metal nobility.

--
Best regards
Han
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