Q&A for How to Make a Mini Flyable Hot Air Balloon with Candles

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  • Question
    Can I use a small brown paper bag?
    Community Answer
    I wouldn't recommend a brown paper bag. The flame may not be far enough from the bag to burn safely.
  • Question
    How would I bring it back down again?
    Community Answer
    You could attach a string to the balloon so that you could pull it down. You could also just wait for the candles to burn out; the balloon will eventually come down on its own.
  • Question
    Is it possible to attach the bag at a distance from the foil base, using string or more balsa wood sticks, to make the candles easier to light? Or does the bag have to be totally covering the candles for it to work?
    Community Answer
    You would lose the heat from the candles. It would not fly. The idea is to trap hot air, which will lift the balloon.
  • Question
    Can I add a basket to my hot air balloon?
    Community Answer
    No, you cannot add a basket because it will be too heavy. The balloon is small, and cannot carry much weight.
  • Question
    Why can't I use plastic for a hot air balloon?
    Community Answer
    Plastic is not recommended because of the high temperature of the candle, which can cause the plastic to melt.
  • Question
    Can tea lights be used?
    Community Answer
    Generally, tea lights are denser because of the paraffin wax and the aluminum wrapper. I would be better if you stick with this method, but if you really need tea lights skim off the wrapper and trim it.
  • Question
    Can I use plastic instead of aluminium foil?
    Community Answer
    No, because the plastic will melt.
  • Question
    Can the candle be thicker?
    Community Answer
    If the candle is thicker, the balloon may become too dense to fly.
  • Question
    Is there any danger of fire?
    Community Answer
    It's possible, so you always want to exercise caution when working with flammable materials.
  • Question
    Can the plastic bag burn?
    Community Answer
    Yes. Plastic bags can burn.
  • Question
    What am I doing wrong if the bag starts wrinkling when I light the candle no matter how far away I hold it?
    Community Answer
    Too much heat.
  • Question
    How high will it go?
    Community Answer
    I've seen some homemade hot air balloons go pretty high, but it depends on your heat source, the wind conditions, etc. It's impossible to say for sure.
  • Question
    Can I use a rubber balloon instead of plastic bag?
    Community Answer
    No. It wouldn't have enough space for the flame.
  • Question
    Can I put my hamster inside? It's dead.
    Community Answer
    No, it would be too heavy. If you augmented the bag size and heat level it might work, but I wouldn't recommend doing this. Give your hamster a respectful burial.
  • Question
    If the string becomes unattached, how long will it take for the balloon to come down?
    Community Answer
    The candles will eventually burn out and it will come down on its own, though it may not be directly above where it was launched.
  • Question
    How high will this balloon travel?
    Community Answer
    It really depends on how well you made it and how big the candles are, but it could get to a decent altitude.
  • Question
    Can I use a balloon to make it fly instead of a candle?
    Community Answer
    No, it won't work.
  • Question
    Where do I put the balsa stick?
    Community Answer
    That's a substitute if you don't have any straws.If you don't have straws, use the sticks.
  • Question
    Do I have to use a certain stick?
    Community Answer
    You can use any stick, as long as it is lightweight and able to resist some amount of heat. Here, balsa wood is the best, as it is lightweight and works well for small projects.
  • Question
    Can I use wooden chopsticks instead of balsa sticks?
    Community Answer
    Yes, as long as you follow the method above very carefully.
  • Question
    Can I glue the candles onto the aluminum foil with hot glue instead of melted wax?
    Community Answer
    Yes.
  • Question
    The plastic bag usually starts to melt after I fly it, and the bag I'm using is a very similar in size to the one shown in the photo. How can I keep this from happening?
    Community Answer
    Use aluminum foil instead. Also, hold it up as you light the candle, and pull down the balloon before the candle goes out.
  • Question
    How do I keep it from getting too hot?
    Community Answer
    You don't. You need the heat to lift the balloon. If you meant keep it from melting, consult the other comments in this article.
  • Question
    Would it be okay to add more candles?
    Community Answer
    No, you cannot add more candles because the balloon would become too heavy to fly.
  • Question
    What is the most common mistake made while making this project?
    Community Answer
    While doing, my group made the mistake of adding too much tape/glue, thus making the balloon ultimately too heavy to fly. Also, don't make it out of paper if it's a small scale. It will explode.
  • Question
    Can I use tissue paper instead of the plastic bag?
    Community Answer
    No, you cannot. Tissue paper would be impractical to use. Just get a cheap plastic laundry bag.
  • Question
    Can I use sewing fabric instead of a bag?
    Community Answer
    Yes, as long as it is light and does not have any small holes in it. You cannot let the heat escape, or else the balloon won't fly.
  • Question
    What size bag is used for this?
    Community Answer
    Try using a grocery bag.
  • Question
    How long will this balloon fly for?
    John Hills- Class of 2024
    Community Answer
    It will fly until you pull it down or it runs out of wax. It is impossible to know the exact time it will stay in the air for.
  • Question
    How high can this balloon go?
    Community Answer
    How high this balloon will go depends on the length of the candles and the size of the bag. If you have a small candle, then it will not go as high as a balloon made with a big candle.
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