Re: Here's one for Bob (hope it makes your head spin)

On 09/08/07 11:53, JF Mezei wrote:
Ron Johnson wrote:

Sorry. Since the bullet travels I still don't understand how N3
makes the *bullet* fly out the barrel.


During combustion, the gases/matter between the start of the barrel and
the bullet want to greatly expand. But they are not given room to
expand, so the pressure rises to accomodate this.

As the pressure rises, the gases push in every direction. When they push
against the gun barrel, nothing happens because the barrel is not
eleastic and doesn't let expansion occur.

You've never watched /Mythbusters/.

When they push against the bullet, the bullet moves towards the end of
the barrel. The bases are happy because by having pushed the bullet, it
now gives them a bit more room within the barrel. But they want more so
they keep pushing on the bullet.

Once the bullet has left the barrel, the gases can then escape from the
barrel and the pressure equalises between barrel and outside air.

But as long as there is a pressure difference between the combustion
area and the oustide, the gases in the combustion area will want to push
anything in the way of reaching the area where there is lower pressure.

And gas pushing against the bullet is an action-reaction, correct?

--
Ron Johnson, Jr.
Jefferson LA USA

Give a man a fish, and he eats for a day.
Hit him with a fish, and he goes away for good!
.

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