I actually achieved low Earth orbit with a Gatorade bottle cap using a single stage. I don't know when the orbit will decay enough to recover that cap.
I did that for a science fair but with al the failed attemps to light the gas (cause of lack of HHO) i ended up wth a gatorade bottle when i figured out how to make enough gas in a short enough time (2 6v lantern batteries). But with the loose neck of the gatorade bottle It didn't get much concentrated thrust. However It did shoud like 6-8 ft. in the air. =3
can you please make a vid on how to make this for 2 reasons. 1. I don't know what volume of make magazine this is in and 2. I cant buy them anyway. Please please please!!!!
When i saw this i just decided i wanted to make hho bombs. with my old hydgrogen maker (like yours) they always blew up, but with my new one that pumps it out of a container, sometimes they make a pppsss noise and then it shrinks. this happens with 2 litter bottles and 7-up bottles. r they 2 strong and the heast shrinks them? oh by the way a use a fuse in the top of the bottle, does that have something to do with it. when i lite it with the cap off it seems like it is powerful. pls reply, thx
I made this little contraption with regular nuts and bolts. My water is turning brown after a couple of them. is this because of rust from the bolts and nuts. if it is is it a big deal, will it hurt your hands. Lastly, after a couple the water developes a smell. is this bad for u either, please post your response under the HHO rocket after searching "tjcheem" i like make magazine to. Thanks for the experiment idea
i really want to make this. when i first saw it in make i was like meh, water rocket probably just means compressed air rocket dealio. but now i'm hyped to make it. one question though, how loud is the bang? i'm just wondering if it'll draw to much attention if set off during school hours as part as my engineering class.
It's like a thud. The less air and the more HHO, the more like an explosion. In my first test I ignited about 3 ounces of pure HHO in my garage and it sounded like a fire cracker. Pure HHO is really potent stuff so be careful. Ignite electronically far away, protect your eyes, ears and fingers, and everything else you consider precious.
I'm not sure i understand why you are letting air in. H2 and O2 together burn completely without the need of air. [2H2(g) + O2(g) -> 2H2O(g)]. Also, why is the water added to the bottle? I can understand in conventional pressurized air rockets it is added for thrust but it seems to me that pure HHO would be WAY more efficient for thrust. Idk, i'm just talking.
Good questions. Air is added to dilute the HHO to reduce the pressure produced from the reaction, turning the explosion into a thud, otherwise the bottle would explode. Water is used as a mass to push against. Conservation of momentum sez the mass times the velocity of the water pushed down equals the mass of the rocket times the velocity going up. The pressurized water vapor alone would exit at high velocity but with very little mass. The challenge is to optimize the mix HHO + air + water.
@teazer999999 Note that the limits on a 2L bottle are high, but you're risking "rapid disassembly" near those limits. We've used a mix of 530 ml H2O, 380 ml air, and 1300 ml HHO (for a fuel fraction of over 75%) and had some incredible (single stage) launches. Predicted post-ignition conditions in that case are 160 psi and 7000° F (!), but the bottle handled multiple launches at those levels (YMMV)... (continued)
@teazer999999 (continued)... This is better than static air-pressurized 2L bottles usually get - perhaps because the bottle is only at these very high pressures for much less than a second (not the many many seconds a "conventional" water rocket has to handle).
Point well taken. When I made the video I reported what I observed. The bucket is measured in gallons (a five gallon bucket). The beaker and weight scales I use are in metric. Living in the US and practicing science I teach my students to be versed in Imperial and metric measurements, but I agree with you, it's best to keep it all in metric for it's so much easier to manipulate.
It was my first attempt and I focused mostly on the HHO generation and stage firing. It should have about the same performance as a water/air rocket. The record for a two stage water/air rocket is about 1,000 feet (330 meters).
A nose cone, better fins, second stage firing time and an optimal mix of air, HHO gas and water for both stages needs to be done in order to improve the flight height.
ferget him put me in ur will please.LOL. I expected the hole thing to blow up,or nothing at all.looks like a 50/50 mix will still fire. thanks for the expiriment.usefull information
Launching at 6:10 !
drbrain735 1 month ago
I actually achieved low Earth orbit with a Gatorade bottle cap using a single stage. I don't know when the orbit will decay enough to recover that cap.
SeriousNot 5 months ago
Great video!
coolliger 7 months ago
I did that for a science fair but with al the failed attemps to light the gas (cause of lack of HHO) i ended up wth a gatorade bottle when i figured out how to make enough gas in a short enough time (2 6v lantern batteries). But with the loose neck of the gatorade bottle It didn't get much concentrated thrust. However It did shoud like 6-8 ft. in the air. =3
GeeksRus95 8 months ago
This has been flagged as spam show
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wrathfulpersonnZQ 10 months ago
...wow... :(
raykupal 1 year ago
Very nice experiment. Good video too of the two flashes. Well done.
gk123434534 1 year ago
can you please make a vid on how to make this for 2 reasons. 1. I don't know what volume of make magazine this is in and 2. I cant buy them anyway. Please please please!!!!
HALOFREAK9715 1 year ago
@HALOFREAK9715
There's a detailed guide on the makezine website... that's where I found this vid.
Naresomez 1 year ago
@HALOFREAK9715 makeprojects(dot)com/Project/Hydrogen-Oxygen-Bottle-Rocket/443/1
themakingofstuff 8 months ago
very impressive with the lift of weight with the small amount of hydrogen
wolfgang8u 1 year ago
When i saw this i just decided i wanted to make hho bombs. with my old hydgrogen maker (like yours) they always blew up, but with my new one that pumps it out of a container, sometimes they make a pppsss noise and then it shrinks. this happens with 2 litter bottles and 7-up bottles. r they 2 strong and the heast shrinks them? oh by the way a use a fuse in the top of the bottle, does that have something to do with it. when i lite it with the cap off it seems like it is powerful. pls reply, thx
tjcheem 1 year ago
I made this little contraption with regular nuts and bolts. My water is turning brown after a couple of them. is this because of rust from the bolts and nuts. if it is is it a big deal, will it hurt your hands. Lastly, after a couple the water developes a smell. is this bad for u either, please post your response under the HHO rocket after searching "tjcheem" i like make magazine to. Thanks for the experiment idea
tjcheem 2 years ago
no instructions ??????
kiwali 2 years ago
Great article in Make Zine
SkaOfCA 2 years ago
great job! keep up the good work..
sedera12 2 years ago
i really want to make this. when i first saw it in make i was like meh, water rocket probably just means compressed air rocket dealio. but now i'm hyped to make it. one question though, how loud is the bang? i'm just wondering if it'll draw to much attention if set off during school hours as part as my engineering class.
o, great work btw.
iHeartMagic 2 years ago
It's like a thud. The less air and the more HHO, the more like an explosion. In my first test I ignited about 3 ounces of pure HHO in my garage and it sounded like a fire cracker. Pure HHO is really potent stuff so be careful. Ignite electronically far away, protect your eyes, ears and fingers, and everything else you consider precious.
teazer999999 2 years ago
Great video, thanks for sharing, 5 stars. Just one question, how high was this launch?
ubunterias 2 years ago
I'm not sure i understand why you are letting air in. H2 and O2 together burn completely without the need of air. [2H2(g) + O2(g) -> 2H2O(g)]. Also, why is the water added to the bottle? I can understand in conventional pressurized air rockets it is added for thrust but it seems to me that pure HHO would be WAY more efficient for thrust. Idk, i'm just talking.
sycmuzak 2 years ago
Good questions. Air is added to dilute the HHO to reduce the pressure produced from the reaction, turning the explosion into a thud, otherwise the bottle would explode. Water is used as a mass to push against. Conservation of momentum sez the mass times the velocity of the water pushed down equals the mass of the rocket times the velocity going up. The pressurized water vapor alone would exit at high velocity but with very little mass. The challenge is to optimize the mix HHO + air + water.
teazer999999 2 years ago
Ah, it all makes sense now. Thanks!
sycmuzak 2 years ago
@teazer999999 Note that the limits on a 2L bottle are high, but you're risking "rapid disassembly" near those limits. We've used a mix of 530 ml H2O, 380 ml air, and 1300 ml HHO (for a fuel fraction of over 75%) and had some incredible (single stage) launches. Predicted post-ignition conditions in that case are 160 psi and 7000° F (!), but the bottle handled multiple launches at those levels (YMMV)... (continued)
brdavis5 2 years ago
@teazer999999 (continued)... This is better than static air-pressurized 2L bottles usually get - perhaps because the bottle is only at these very high pressures for much less than a second (not the many many seconds a "conventional" water rocket has to handle).
brdavis5 2 years ago
how much does it cost to make?
mkillerz979 2 years ago
If you were to buy everything, less than $100. The most expensive component is the power source which can be a battery charger.
teazer999999 2 years ago
Hold on - baking soda measurement in metric, water measurement in imperial? Boo.
5 gallons is about 19 litres.
pelrun 2 years ago
Point well taken. When I made the video I reported what I observed. The bucket is measured in gallons (a five gallon bucket). The beaker and weight scales I use are in metric. Living in the US and practicing science I teach my students to be versed in Imperial and metric measurements, but I agree with you, it's best to keep it all in metric for it's so much easier to manipulate.
teazer999999 2 years ago
Well, it's really a minor nitpick on an awesome project :)
pelrun 2 years ago
all that for that
thegreatkoua 2 years ago
It was my first attempt and I focused mostly on the HHO generation and stage firing. It should have about the same performance as a water/air rocket. The record for a two stage water/air rocket is about 1,000 feet (330 meters).
A nose cone, better fins, second stage firing time and an optimal mix of air, HHO gas and water for both stages needs to be done in order to improve the flight height.
teazer999999 2 years ago
Neat! I had one of the estes hydrogen rockets for my kids, I may try to build something like this.
jeromeyward 2 years ago
ferget him put me in ur will please.LOL. I expected the hole thing to blow up,or nothing at all.looks like a 50/50 mix will still fire. thanks for the expiriment.usefull information
uawwildbob 3 years ago
great video, very discriptive
classicalcritic 3 years ago
Do you have a will?
jegogdotorg 3 years ago