In article , (Malcolm Hoar) wrote:
In article , "Edwin Pawlowski"
wrote:

"Malcolm Hoar" wrote in message
1 HP isn't a huge amount and a saw blade doesn't have a
huge mass. Kickback can certainly hurl a chunk of
wood across the room/shop. But it takes a lot of energy
to throw what looks to be a sizable piece of molding
across a construction site -- 7.5 feet vertical and
50ft plus horizontal, apparently.

The horsepower of the motor doesn't matter much in this
kind of scenario -- the stored energy in the spinning
blade is what matters. And I don't think that would be
sufficient. But that's why I asked for the OP's estimate
of the mass of that molding. I'm guessing it's at least
a couple of pounds.

But what you think and what really happens are entirely different.
Experience a good kickback and you'll be a believer. I've seen wood put
through metal garage doors. Traveling at 100+ mph can do some damage.

http://www.metacafe.com/watch/910584...demonstration/
http://www.newwoodworker.com/kickback.html

Those videos depict exactly what I would expect. It looks
a much smaller piece of wood and it travelled just a few
feet.

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.

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

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