2 lbs. to the front of my TM PC6 Porter. Used sand. Took 2 sealable sandwich bags, weighed a pound into each. Press all the air out, seal into another baggie then wrap the whole thing up with duct tape. Tie-wrapped one on left side and one on right to a former between front of battery tray and firewall. (Porter has a long nose..). Working great.. out of sight and can be removed quickly if need be.