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- Xref: sparky sci.electronics:22445 sci.energy:6799 rec.autos:31516
- Path: sparky!uunet!olivea!apple!goofy!michael.apple.com!ems
- From: ems@michael.apple.com (E. Michael Smith)
- Newsgroups: sci.electronics,sci.energy,rec.autos
- Subject: Re: Flywheel batteries as EV power source
- Message-ID: <1993Jan12.003428.23062@michael.apple.com>
- Date: 12 Jan 93 00:34:28 GMT
- References: <drury-070193073338@esrfd.es.dupont.com> <1993Jan8.010401.6096@cis.ohio-state.edu> <1993Jan9.183414.19078@ke4zv.uucp>
- Organization: Circle 'C' Shellfish Ranch, Shores-of-the-Pacific, California
- Lines: 52
-
- 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
-
- 'Whatever you can do, or dream you can, begin it. Boldness has
- genius, power and magic in it.' - Goethe
-
- I am not responsible nor is anyone else. Everything is disclaimed.
-