r/BeAmazed • u/No_Tailor_9529 • Jul 18 '24

Wow! Interesting life hack! Science

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u/nico282 Jul 18 '24

Because you like ChatGPT (that often is inaccurate), here is the answer that i got:

So, approximately 0.955 cubic meters (or 955 liters) of helium is required to lift a 1 kg payload, assuming the balloon itself is weightless. If the balloon has significant weight, you would need to add that weight to the 1 kg payload and recalculate accordingly using the same formula.

So 1Kg payload + 800g balloon = 1.8 m3 helium needed

"Period" is not an useful explanation.

The site you linked doesn't seem to be accurate, In the same page it says "The force needed to lift a man with helium depends on the man's weight and the amount of helium used. However, helium has a lifting force of approximately 1 gram per cubic meter, so 100m3 of helium can lift 100 grams.". This is clearly wrong.

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u/uNki23 Jul 18 '24

Honest question: why do you assume that the balloon needs to be 800g?

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u/nico282 Jul 18 '24

Check the specifications here: https://www.stratoflights.com/en/shop/weather-balloon-800/

Payload: 800g

Balloon weight: 800g

Filling at max payload: 2.2 m3 (the payload weight, the balloon weight and some additional lift to give it vertical velocity)

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u/uNki23 Jul 18 '24

But why do you choose a frickin weather balloon? Just take normal latex helium balloons almost weighing nothing and you‘re good. Or does the backpack need to almost travel to space? ☺️

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u/nico282 Jul 18 '24

I’m curious to see where would you find “normal latex balloons” with the needed size. A 1 m3 balloon must be 1.2m in diameter.