Grocery Bag Hot Air Balloon

6,685

94

31

Posted in PlayToys

Introduction: Grocery Bag Hot Air Balloon

About: A DIY enthusiast.

Facts about hot air balloon

Hot air balloons (in the east known as sky lantern) fly when the air inside the hot air balloon is less dense than the air surrounding it. Hot air is less dense than cool air; the heated air causes the balloon to rise simply because it is lighter than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it helps hot air balloons and blimps stay in the air. A hot air balloon uses a heat source to heat up the air inside the balloon.

This is an instructable of making a hot air balloon from a grocery bag.

The reason I did this instructable was my passion of hot air balloon.

References:

https://howthingsfly.si.edu/ask-an-explainer/how-d...

https://en.wikipedia.org/wiki/Sky_lantern

Step 1: Items

Items(This items are easily get from your local store)

  1. Grocery bag (I find the biggest ones)
  2. 4 drinking straws
  3. String
  4. Needle
  5. Candle
  6. Sticky tape
  7. Aluminium foil

Tools

  1. Scissor
  2. Lighter

Step 2: The Frame

  1. Firstly, I attach every ends of the straws with the sticky tape. (I make sure that the usage of the tape are just adequate as not to add extra weight to the frame)
  2. I tape the straws so that the angle of each corner is 90 degree.
  3. When finished, it will look like a square.

Step 3: The Platform

  1. I cut the thread into two and tie the threads in the middle (the thread should be long enough to be tied at each corner of the frame later).
  2. Then, I cut the aluminium foil in square.
  3. Using a needle with the thread, I link every corner of the squared foil. (Be very careful not accidentally tear the foil in the process)
  4. To secure the fixture, I attach the sticky tape in the middle.

Step 4: The Carriage

  1. I tie each thread's end to the frame.(you need a lot of patience and nimble fingers)
  2. The facing downside will be the side with the tape and the facing upside is without the tape.
  3. In the center of the foil, I will put a candle (or a few).

Step 5: The Balloon

  1. I attach the under carriage to the grocery bag with stick tape.
  2. Then, I light the candle and let the bag expand slowly. (It will take a while before the balloon is fully expand. You can add additional candles to quickly assist the process)
  3. I test the balloon for a while before let it go to rise.
  4. Please watch the test flight video.

FYI, I burn a few balloons before I succeed :D


HAPPY MAKING!

Please don't forget to vote for me.

Share

    Recommendations

    • Spotless Contest

      Spotless Contest
    • Microcontroller Contest

      Microcontroller Contest
    • Space Challenge

      Space Challenge
    user

    We have a be nice policy.
    Please be positive and constructive.

    Tips

    Questions

    31 Comments

    Please think twice (or three times) before littering the countryside with material that can cause such damage to wildlife and has the risk of causing uncontrolled fires.

    If you must make one then ensure that everything in the construction will bio-degrade rapidly and with as little fuel as possible.

    Don't use plastics at all!

    http://www.rspca.org.uk/adviceandwelfare/litter/ch...

    1 reply

    Yes, you are right about that. However, some of the grocery stores start to use biodegradable plastic bags. If you are lucky, you can make hot air balloon from it.
    Thanks for commenting :)

    I've seen this done with a cotton ball soaked in methylated spirit instead of a candle and a bigger soaked & lit cotton ball on the ground under the balloon to initially fill it with hot air. Obviously best done in winter when the air is cold and ground is wet so you don't get to spend time in jail as Bubba's wife for starting a bush (forrest) fire.

    1 reply

    Yes, you're absolutely right about that. Somehow for a real hot air balloon, the handlers usually initially fiĺl up the balloon with a lot of hot air before the flight. It is same with this. The balloon must have external heat than the candle or soaked cotton attached to fill up the cavity.
    Thanks for commenting :)

    I have been experimenting with this idea for a wile i will give yours a try and see if it works

    1 reply

    Let me know if you've succeed :)
    Thanks for commenting.

    I have been experimenting with this idea for a wile i will give yours a try and see if it works .

    1 reply

    Let me know if you've succeed :)
    Thanks for commenting.

    I have been experimenting with this idea for a wile i will give yours a try and see if it works .

    1 reply

    Let me know if you've succeed :)
    Thanks for commenting.

    I have been experimenting with this idea for a wile i will give yours a try and see if it works

    1 reply

    Let me know if you've succeed :)
    Thanks for commenting.

    Thanks for commenting.

    Thanks for commenting.

    I used dry cleaning bags, larger volume, greater lift. Also used birthday candles, about half a dozen.

    1 reply

    It's so fun doing it :D
    Thanks for commenting.

    Thanks for commenting.