A picavet is a self-leveling rig that attaches to a kite or balloon string. The picavet stays level even while the string changes angles when blown by the wind.
Step 1: Making use of "trash" as building material
The picavet rig will hold the camera level and facing down no matter what angle the balloon string is. The picavet is like a self-leveling marionette platform.
My camera fit into the foam packaging from my G1 phone perfectly.
Step 2: Parts and stringing it all together
I taped the packaging up at the corners and used scrap wood and eyes in the corners of the cross.
I didn't trust myself and restrung the kite string a couple of times until I convinced myself it was right. The key is that until there's weight in the picavet, the self-leveling doesn't really work. Empty picavets aren't as good as full ones.
Step 3: Now go launch your ballloon!
Watch this video of our camera launch to see how it all worked together: www.youtube.com/watch?v=O7RyHSwMvqs
I store my picavet attached to a coat hanger so the string doesn't get tangled up and it's ready to use the next time. (and there will be a next time!)
More details: www.JetCityOrange.com/balloon-photography/