New! Tetroon volume calculator and micron/mil calculator

Calculators

Tetroon Volume Calculator

This calculator estimates the volume of a fully inflated regular* tetrahedral balloon. Note that the length of one side does not equal the height of the balloon.
*This means all 4 sides are equal.
Enter the values below and click Calculate.


Length of one side: Units

Volume ≈ Units3
__________

Micron/Mil Converter

Convert microns (µm) to Mils (0.001 inch) or vice versa. Just enter the number in the field and it automatically calculates.
Enter value:

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10-foot tetroon broke 700!

10-foot solar tetroon shortly after release, beginning a 780-mile flight I'm a little late in getting the word out, but now the video is done and I am announcing my longest flight yet...A 10-foot tetroon flew 780 miles in less than 6 hours!

I've confirmed the sender's IP address so this is not a hoax. The balloon was found near Quinby, Virginia the day after the release.

This particular 10-foot tetroon was over a year and a half old when I released it. As you can see, it has many patches and some small holes and has been my aerial photography balloon since I built it in the early spring of 2006. This is the tag attached to the balloon prior to inflation When I built the 13 foot tetroon, I decided I should get rid of my old beat-up balloon - and of course, I got a tag ready and turned the old tetroon into the sky.

You can make and fly your own balloon this far! Here are a few links to help you get started.

How to make your own
How to release solar balloons
Buy pre-built solar balloons
Sign up for our contest!

Here's the video



500 miles!

Solar balloon was released and flew 500 miles in 7 hours!
Yes, a 5-foot tetroon has flown 500 miles, in just 7 hours! It was released in the morning so it had lots of time to fly. The previous record (230 miles to North Carolina) only had 4 hours of travel time. This one flew more than twice as far in less than twice as much time! Watch the video to see the whole story.


Fall is here...

It's autumn again, and with cooler weather it's prime time for flying! Oct 29 2007 - A 5-foot tetroon is released in perfect conditions If you are interested in releasing tagged balloons, taking aerial pictures, or just flying for fun, it's time to start building. Click Here for building instructions, or Purchase pre-built solar balloons. I will be attempting to achieve new record distances for 5-foot tetroon (and other balloon) flights this fall, as well as getting some cool new aerial photos. I am also running a contest for the farthest solar balloon flight. Click the link below for more info.

CONTEST: Farthest Recorded Solar Balloon Flight

I am running a contest this fall to see who can fly their solar balloon(s) the longest distance. The winner will recieve a Deluxe Solar Balloon Package (One 5-foot tetroon, one 24-foot solar tube, one 9-foot tetroon and a spool of monofilament fishing line tether). Click Here



Out of state! 5-foot tetroon makes amazing 230-mile flight in less than 4 hours

solar balloon 230 mile flight February 4, 2007: Another 5-foot tetroon was released around 1:30 PM CST. Two days later it was found in a creek bed under a canopy of trees! The balloon probably washed a short distance downstream before it was found on February 6th, in Hayesville, North Carolina.

This is my first out-of-state flight ever that has been recorded. From the time the balloon was released to the time the sun set was less than 4 hours. The balloon was traveling at over 60 mph!

See how I did it!




Solar tetroon traveled 170 miles

Solar balloon beginning 170 mile journeyOn December 27, 2006, I released two 5-foot tall tetroons. Each one had a card attached to it displaying my Web site address and where/when it was released. That evening I got a return from one of them. It had flown approximately 40 miles northeast of the launch site before landing in a pond.

Three days later, I released another tetroon. After the sun had set and I was sure the balloon had landed, I checked my email. Sure enough, someone had found my balloon. But as I read the message, I realized that it was the other balloon I had released 3 days before—and it was over 170 miles away ...

How do solar balloons work?

A few facts to get you started if you're new to solar ballooning:

8-foot solar balloon Solar balloons are constructed with thin black film, usually high density polyethylene (HDPE). Since dark colors absorb heat, black is the best choice (although clear solar balloons have been made). When the balloon is exposed to direct sunlight, the heat is absorbed by the black film, which in turn heats the air inside the balloon. This way, a solar balloon can be filled with cold air, and it will soon heat up and generate lift.

Since hot air expands, this helps inflate the balloon, but not all the way. If a balloon is (for example) only 1/2 full, the air inside will heat quiclky and rise, pushing against the top and sides of the balloon. By pushing the envelope outward, it forces air into the balloon through the mouth. This eventually completely fills the balloon and it is ready for flight.

solar power is all that is required for flight Since solar balloons can stay hot and full, they can travel for hundreds of miles in one day. How exactly does this work? Since hot air rises, the balloon will continue to ascend until it reaches a very high altitude. At high altitudes, the balloon can get caught in a jet stream, which will carry the balloon at a much higher speed than the wind at ground level. But when the sun sets, the balloon loses heat and begins to descend. This is how solar balloons can fly great distances.

So you want to build a solar balloon? You can learn how to do just that on this site. The only supplies you will need to build a solar balloon are:
  • Black trash bags (must be 0.5 MIL or thinner)
  • Masking tape (or other lightweight adhesive tape)
  • Scissors
To get started, click here.

Solar balloons can be flown for a variety of purposes: for fun, advertisements, aerial photography, releasing, etc. They are great at drawing attention, especially when flown in subdivisions, at parks, etc.

When you start out, you may want to tether your balloons to keep them from flying away. One good material to use for tether is monofilament fishing line. It is lightweight yet strong and comes in a few different colors. Tether and digital camera harness attached to a 10-foot tetroon Flourescent green is probably the best color to use, because of its higher visibility. The pound test (weight at which the line breaks) of the line should be determined by the size of the balloon. 10-15 lb. test line is good for balloons 8 feet tall and smaller. 20-50 lb. test line is good for larger balloons which may carry a camera or other payload which you do not want to lose. Tether can be attached by using several long strips of masking tape (or just 1 or 2 strips of duct tape) stacked together and attached to the mouth of the ballon along one of the seams. Then you can tie the line to the loop and stick it to the balloon.
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