daytripper typed:
On Tue, 7 Nov 2006 07:47:36 -0500, "Robert11"
wrote:

Hello:

Was reading a book on ballistics the other day, and the author was
describing conditions
where a rifle barrel would drop a small amount as a shell was fired.

He used an example that if one held a fly rod rod truly horiz., and
gave the handle a very quick
upward (I think he means backwards; toward ones head) pure rotation,
the tip momentarily goes Downward.

Have my rods away for the season, so can't try it.

Can't visualize this happening.

Does it ?
Why does it, if so ?

B.


I can't see how any downward force vectors at the rod tip increase in
this scenario, so while he's correct that the rod tip will point
below horizontal, it doesn't "drop", it simply lags behind the rest
of the rod movement, establishing an arc...

I s'pose the same thing could happen with rifles, to some (hopefully
vanishingly small) degree...

Are we discussing a slow rifle or medium-fast?
--
TL,
Tim
---------------------------
http://css.sbcma.com/timj/