On Apr 16, 1:33 pm, "Greg Neill" wrote:
"BoyntonStu" wrote in message





On Apr 16, 9:00 am, "Greg Neill" wrote:
"BoyntonStu" wrote in message



Put a weight on a shovel face and try to lift it
while gripping only the shovel handle. Repeat
sliding one hand down near the business end.
Compare efforts.

Place the tip of the shovel face on the ground.

Is it easier to tip the load upwards with a short handle or with a
long handle?

Without a fulcrum obviously the short handle is
preferred, as I intimated above.

The fulcrum is offset from the lever handle by the length of the
plywood plate.

What fulcrum would that be, and how does it result
in a downward directed force on the saw and plate?
The saw is fixed to the plate, right? Torquing the
handle about the fulcrum would lift the rear end of
the plate, and wouldn't do much to prevent the whole
saw + plate assembly from lifting out of the cut.

If you push the angled handle to make a cut, the effort will resolve
into 2 components: (1) forward and (2) downwards.

I never feel any lifting feedback.

Have you ever experienced a kickback or a lift using a circular saw?

I have worn out several in my lifetime and I have yet to see any
difficulty in this arena.

Hence, my 'gadget'.