🚀 go-pugleaf

In article <1993Jan9.183414.19078@ke4zv.uucp> gary@ke4zv.UUCP (Gary Coffman) writes:
>In article <1993Jan8.010401.6096@cis.ohio-state.edu> rubin@skiing.cis.ohio-state.edu (Daniel Rubin) writes:
>>
>>I think comparing expanding gases or fluff or whatever in a flywheel and 
>>that of gunpowder in a gun barrel is not justified.  The gasses released
          ^^^^^^^^^
>>from black powder in a gun barrel act to push an object to "mach 1" or
       ^^^^^^^^^^^
       It is worth noting that these are two DIFFERENT things!

>>whatever speed was posted earlier in ONE direction.  You cannot compare this
>>to gas or whatever explaning in 3-D space.  I pile of black powder won't move
>>an object placed on top of it at all or a very small amount, probably 1/100000
>>the acceleration of it in a barrel.  That actally turns out to be a great
>>example. In a previous post it was said that 7 grains of black powder can
                                                           ^^^^^
I think it was 7 grains of Bullseye Smokeless powder.  Blackpowder loads
are usually double digit... things like '40' grains are common...

It may seem like a nit, but it is an important one ... the two materials
have far different behaviours when on fire, both contained and open.

>>push a bullet to mach 1.  That may be true IN A GUN BARREL.  Take 1 pound of
>>black powder and place it on the ground and put a bullet on top of the pile.
>>Light the pile and you get a lot of fire and heat and the bullet will most
>>likely not even budge, just get really hot!  I wish I could include the 
>>amount of hot gasses released from a pound of black powder as compared to 
>>7 grains, but I can't and the ratio between 7 grains and 1 pound should
>>describe the situation well enough...
>
>I urge you not to try this experiment at home. Blackpowder is a primary
>explosive rather than a flamable solid. It can explode *unconfined*
>when ignited in amounts of 1 pound or more. That explosion will be more
>intense than that of a similar amount of dynamite, which will also 
>explode unconfined. To dispose of blackpowder safely by burning, you
>must spread it thinly along the ground in trains and ignite only one
>end, allowing it to burn *slowly* with the heat rapidly conducted away
>by the large mass of air to which it is exposed.
>
>Gary

Very good warning Gary!  Best way to dispose of black powder?  Dust
it over your lawn as fertilizer... and water it in.

-- 

E. Michael Smith  ems@apple.COM

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