Dave:

What is commonly called a harmonic "Balancer" is not. It is a damper (NOT dampENer) to remove or decrease the tendency of a crankshaft to twist torsionally in operation. Viscous (semi-liquid) dampers have been used foir many years.

Mark:

If it works, it works.

I just don't see how centrifugal force will push the movable weight to the lighter side.

In trucks, I'm sure you've seen the big harmonic damper on the Cummins 855 engines, that's an example of Dave's viscous damper.

Quote Mark:

when you are upside down down is up and up is down!
DOH!

It's all a matter of perspective. When you try it blindfolded tell me; I'll want to watch.

Liquids tend to slosh, my twins say it's bosh.

Bill.