cheap landbased balloon fishing for Spanish Macks WA

How to make cheap hydrogen balloons for landbased fishing

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Daryn's picture

Posts: 127

Date Joined: 01/05/12

I just know I'd somehow end

Mon, 2018-05-28 15:24

I just know I'd somehow end up wearing the caustic soda!


Sounds like a good experiment though.

Mick C's picture

Posts: 547

Date Joined: 26/12/13


Mon, 2018-05-28 15:57

The below extract suggests a high degree of caution is required when dealing with hydrogen gas. Important to not blow yourself up.

Hydrogen gas (dihydrogen or molecular hydrogen) is highly flammable and will burn in air at a very wide range of concentrations between 4% and 75% by volume. The enthalpy of combustion is −286 kJ/mol.

2 H2(g) + O2(g) → 2 H2O(l) + 572 kJ (286 kJ/mol)

Hydrogen gas forms explosive mixtures with air in concentrations from 4–74% and with chlorine at 5–95%. The explosive reactions may be triggered by spark, heat, or sunlight. The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F).


Ability is what you are capable of doing. Motivation determines what you do. Attitude determines how well you do it - LH.


way to go's picture

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Date Joined: 25/05/18

flammability of hydrogen

Mon, 2018-05-28 21:06

I agree with your flammability statement (4-75% by volume in air) but the hydrogen balloons would allways contain more than 90% hydrogen, and hydrogen is not flammable at these levels. To quote Wikipedia:

"Hydrogen has been portrayed in the popular press as a relatively more dangerous fuel, and hydrogen in fact has the widest explosive/ignition mix range with air of all gases except acetylene. However this is mitigated by the fact that hydrogen rapidly rises and disperses before ignition, and unless the escape is in an enclosed, unventilated area, it is unlikely to be serious." I remember when I lived in Sydney before natural gas was around  all homes had coal gas piped to them, which was largely hydrogen with some smell added.

Hydrogen balloons for transport were pretty common in post WWI times and they didnt explode.  Dont know why you mentioned chlorine- there is no chlorine involved.


Dale's picture

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Date Joined: 13/09/05

Mon, 2018-05-28 16:03

 That’s a very explosive concoction, we used to make hydrogen bombs when we were kids, so I’ve seen first hand how much explosion is there. Do that at your own risk.


"Just because you are a Character, Doesn't mean you have Character."

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Callum24's picture

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Terrorist ballooning we may

Mon, 2018-05-28 18:15

Terrorist ballooning we may need to call trumpy bout this


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Da pirate's picture

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Date Joined: 03/05/15

Ha ha !!

Mon, 2018-05-28 18:49

HA. Ha ! Nice cal !! We are going too build a

wall .... and little rocket man is goin too get

fire and fury .... 

little johnny's picture

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Date Joined: 04/12/11

Stuff that to dangerous

Mon, 2018-05-28 19:03

We make caustic soda . And alumina . Seen some very back accidents and burns over the years . Eyes and arms the worst. Not worth the risk.all it takes is one wrong move.

way to go's picture

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Date Joined: 25/05/18


Mon, 2018-05-28 21:10

I laid out the safety precautions in the article. Dont forget Caustic Soda is widely used for cleaning, paint stripping etc and with the correct precautions no problems.

still trying's picture

Posts: 568

Date Joined: 27/06/17

 Just cant stop thinking

Mon, 2018-05-28 19:23

 Just cant stop thinking about getting the costic on you somehow, god just a tiny bit burns straight away i forgot to flush the sink abit better one day trying to fix a block and removed the u bend and splashed a small drop or 2 on my hand. 


 rather be fishing

little johnny's picture

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Bad stuff

Mon, 2018-05-28 19:39

And after using , where do you tip the stuff away?

way to go's picture

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Date Joined: 25/05/18


Mon, 2018-05-28 21:13

Read the end of the article- tip it in the ocean. If the reaction is complete there is only water left, if incomplete it would be rapidly diluted by the ocean, tne sodium ions would take their place along with the other sodium ions in the salt!

little johnny's picture

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Date Joined: 04/12/11

Fair call

Mon, 2018-05-28 21:55

I don't like the stuff. Mind you stuff we use has heaps more tc than bottled stuff.

Walfootrot's picture

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Date Joined: 23/07/12

Hey John need some caustic

Sun, 2019-04-28 15:42

Hey John need some caustic and aluminum, know where I can get some? lol
Can just see them balloons flying across Cockburn sound from your work.


More drum lines, kill the bloody sharks!

way to go's picture

Posts: 5

Date Joined: 25/05/18

need to warm solution if its cold

Mon, 2019-04-29 07:00

Just to add to the article on making Hydrogen-

The process is correct if the water-NaOH mix is at about 30 degrees, but if it is cold the reaction is a lot slower:

At about 10 degrees it can take about 2 hours instead of 30 minutes to make a 48cm balloon.

So you need to warm the solution first in this situation, but do not heat above 30 degrees or the reaction will boil.

Add the Caustic soda to half (5L) container of water, shake to dissolve, this should warm the solution, top up the container with hot water to reach 30 degrees.

Posts: 1079

Date Joined: 05/05/06

Cheers for putting that up,

Sat, 2019-04-27 12:49

Cheers for putting that up, if youre confident you can do it, then why not!!!