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Doug Miller

In article , (Malcolm Hoar) wrote:
In article ,
(Doug Miller) wrote:

Oh, come on! The piece of wood in the first video travelled "just a few feet"
because it hit a sheet of plywood on the opposite side of the shop! Can't you
imagine that it would have gone much farther than it did, if there hadn't been
something in the way? Good grief.

It didn't penetrate the plywood, did it?

It wasn't shaped like a spear, was it?

The OP's molding penetrated shingles, insulation and
drywall. And that was at a range of 50ft!

Shingles, insulation, and drywall are not nearly as sturdy as a sheet of what
appeared to be 3/4" ply.

Sure the wood in the video would have gone farther. But
not much before the effect of gravity drove it to the
ground. Maybe 10ft, maybe even 20ft, but nothing close
to 50ft, IMO.

Perhaps you'd care to do the computations. V[i] = 110 mph.

Such a free-flying projectile is decelerating in the
horizontal plane and it's accelerating rapidly in the
vertical.

Kickback occurs when the wood comes in contact with the teeth at the *back* of
the blade, which are *rising* -- causing the initial launch vector to have a
small, but measurable, upward component. Watch the video again. The board
struck the plywood at a noticeably greater height than the top of the table
saw.

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.