Like this:



But seriously folks...

A good prop balancer like the one put out by Great Planes can be very handy. The one made by Dubro works well with larger props. With a 3 bladed prop, you know that it's perfectly balanced wheh it comes to rest in a different position each time it stops. In other words, if you give the prop a slight spin, and each time you do it, it stops in the same position, the bottom side is heavy (This is reguardless of how many blades it has). And it should not start to spin in the opposite direction after it stops)

But don't get too crazy. Unless you are doing VERY presision stuff, like extreme speed, there is rarely a case where a prop under 14" ever really NEEDS to be balanced.

And when they do, "Close" is close enough.