Step 8: Mounting Braces

Now that your blimp is working ( and hopefully you've tested it by now to make sure that it is), you need a way to attach it to your soon-to-be-inflated envelope. Cut 4 strips of balsa beam, about 2" long, and on the end of each glue a square of balsa just big enough to fit a velcro patch. Glue one of these struts to each corner of the blimp frame. They too will need some triangular supports, so cut out 16 of these - mine were right triangles, with the short legs about 1/2" long. On each strut, glue two to support the square and two to support the column at its base, as seen in the picture. Finally, press a velcro patch onto the pad of each column, and its adhesive should hold it there nicely.

You've built the 'gondola' of the blimp. Now you just have to get it airborne.
<p>Can something be sprayed onto a plastic wrap skin, to help hold in the hydrogen gas? I'm trying to keep it light, but don't want the gas to leak out too quickly. Really cool project.</p>
<p>Do you have any idea how much weight (gram) the blimp can lift ? </p><p>Thanks</p><p>Sam</p>
You blimp looks awesome, only the code is without any doubt the most incomprehensible code I have ever seen! I can't make heads or tails from it. Could you explain the how te code works? I really like the 433 MHz set I got, but I haven't found a clear code that I can adapt to my homemade rover. <br> <br>Thom
Darn, I have been trying to figure out your code for quite some time, IT-IS-SO-SIMPLE, I have tried to use virtualwire but then I can't use the servo library (they hate each other). Thanks for sharing it!
when I first read the title I accidently read &quot;Hydrogen bomb.&quot;
Nice work on this project! I had the same 433 Rx Tx units and could never get them to communicate properly! Definitely one of the best troubleshooting sections I've read!
this soo reminds me of the hindenburg. tho to be fair, hydrogen had nothing to do with the explosion. zinc paint(?!) was the problem. <br>very cool project. <br>tho 433mhz might not be legal in USA, but even a toy car with arduino could work
You are my hero. I have tried filling a smaller blimp with hydrogen in the same way, but using only very small amounts of lye (five attempts with no success). I would love to build a setup like this some day, especially one using a hydrogen fuel cell for power. One question: does the water buffer remove any steam or water vapor from the hydrogen entering the envelope? I always worried about getting water in it. Thanks for a very informative 'ible.
You're right to be worried about water vapor. It will only be a problem if you let the reaction get too hot, which will make it start steaming or even boil if it gets out of hand. If you make sure it doesn't get more than a little warm ( I dunno, 75 deg F), the water vapor will be negligible. If you're really worried about it, you could try running the gas through a percolator to cool it down before it enters the envelope (meaning some of the vapor would condense out). The buffer I have is mainly to prevent any water in liquid form that bubbles up from getting close to the envelope. Don't give up on lye!
Awesome. Love the chemistry lab details and the troubleshooting section.

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