Re: Here's one for Bob (hope it makes your head spin)
- From: "Richard B. Gilbert" <rgilbert88@xxxxxxxxxxx>
- Date: Mon, 10 Sep 2007 09:02:22 -0400
briggs@xxxxxxxxxxxxxxxxx wrote:
In article <_hFEi.71628$rH6.27721@xxxxxxxxxxxx>, Ron Johnson <ron.l.johnson@xxxxxxx> writes:
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/.
In the normal firing of a gun the barrel is approximately rigid. The
fact that in extraordinary circumstances, the barrel is spectacularly
non-rigid is normally irrelevant.
Actually the barrel is quite flexible! It bulges very slightly as the bullet passes through; imagine a snake swallowing a mouse. It also vibrates like the strings on a guitar. A large part of building an accurate rifle lies in mating the stock to the receiver and barrel so as to allow the barrel to vibrate in a consistent and predictable way. Just as pressing the guitar string with your finger determines the note it plays, where and how the stock and barrel make contact affect how the barrel vibrates and where the bullet strikes. You then "sight it in" using the ammunition you plan to use and a target placed at the proper distance to simulate your intended use.
.
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