DIY Picavet Cross for Balloon Photography
Intro: DIY Picavet Cross for Balloon Photography
I built a simple picavet cross to hold and stabilize my camera when I sent it aloft using helium balloons.
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.
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
I wanted to put my Canon SD1100 IS up in the air. I wanted to shoot video not stills and this camera does great video.
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.
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 used the instructions on this page to figure out how to build and string my picavet http://www.kaper.us/basics/BASICS_picavet.html
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.
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!
I used very small carabiner-like clips to attach the picavet to the kite string.
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/
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/
13 Comments
bwrussell 13 years ago
JetCityOrange 13 years ago
My Flip video camera is lighter and while this means less ballast it also means it will take fewer balloons to get it aloft. The other thing we all agreed was almost a necessity was a way to reel the string in and out faster. As Cub Scouts we used to take a piece of wood (let's say 8"x10") and cut a broom handle to use as handles.
Bad drawing but the broom handles extended to one side at the top and the other side at the bottom so we could pull in 10" X 2 every rotation.
I hereby promise to post an update once the weather warms up!
bwrussell 13 years ago
jooknon 13 years ago
Otherwise, very cool build
JetCityOrange 13 years ago
Too bad I didn't notice that the lens was zoomed all the way in. The video doesn't do justice to high it went. Next time...
thanks,
Jerry
Havenwar 13 years ago
JetCityOrange 13 years ago
JetCityOrange 13 years ago
Havenwar 13 years ago
JetCityOrange 13 years ago
gomiboy 13 years ago
Nicely done!
JetCityOrange 13 years ago
The things I do differently? More balloons to get more lift vs drift. Timing it for little or no wind. Having a reel or some way to handle the line quickly without it getting tangled up.
The picavet? A real winner!
I'll try to throw it on the digital scale at the food co-op and get the weight of the rig and of the rig with the camera.
swilus 13 years ago