Do not feel there is a need for more gun barrels or increased accuracy
in world, there are already more than needed in the world.
Den 2022-08-14 kl. 18:24, skrev gene heskett:
On 8/14/22 08:04, andy pugh wrote:
On Sun, 14 Aug 2022 at 09:56, <l...@pibf.de> wrote:
Hello,
it is worth to spend my time to do this?
I looked to the code and it seems doable.
I think that it is a pity that it only works in XY. However I have
never used the feature and don't know how often it is used. I don't
believe that any CAM packages know how to use it.
Why not go all the way, to the 9 currently defined?
As for usefulness, the first place I might try it would in be
profiling a rifle barrel,
perhaps with some math help from a finite analysis of some sort.
Firing a round
obviously generates a vibration, a whipping of the barrel, the
magnitude of which
affects the accuracy. If the bullet exits the barrel in the center of
this vibration,
it is moving at maximum velocity whichever way the barrel is
vibrating. You can
quickly change a 1" at 100 yards gun into a 5 incher that might
completely
miss the venison you were trying to harvest.
By changing the profile of the barrel, or the mass on the end of it as
Browning has
been doing for around 20 years now, you can tune this vibration in
such a way as to
put the bullet leaving the end of the barrel at the maximum amplitude
of this
vibration, which corresponds to the minimum horizontal speed. By
tuning this
to hit that minimum speed point for your favorite load, that elusive
10 shots
into one ragged hole can be achieved. The smaller that hole is, the
higher you
are ranked on the wailing wall at the national shoots, And at some
shoots it
can have a very large effect on the size of the paycheck.
It also sells barrels. I put a fresh barrel on old AT&T 3 years ago, and
haven't look back. Made by the same maker that won quite a few of
those shoots.
With my aged eyes, that 6.5mm Creedmoor is giving me one MOA targets,
reliably.
That is good enough for the girls I go with.
Unfortunately the rules for those shoots eliminate me as that one
weighs in about
10 lbs too heavy. They intend to make you compete with hunting weight
rifles.
If you were going to do this, then I feel that adding UV would also be
useful. There is a sub-set of users that use XY/UV hot wire cutters to
make airfoils who might, possibly, want to use Nurbs.
(Though, actually, they probably use the NACA equations?
https://en.wikipedia.org/wiki/NACA_airfoil )
Cheers, Gene Heskett.
_______________________________________________
Emc-developers mailing list
Emc-developers@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-developers
