Jam Jar Car Fun
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Re: Jam Jar Car Fun
Yeah, that is fun. And seriously, we need to do a jamjar helicopter. I may have to start a thread for that.
Mike Often wrong, never unsure.
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Re: Jam Jar Car Fun
I remember seeing that episode of Mythbusters some time ago and wished they'd tried to perfect a real jam jar jet barrel instead of just another pulsejet albeit they used a barrel for the combustion chamber. I once saw some 55 gallon drums going to a dumpster and thought about trying a drum jam jar jet but there's the consideration of size, how the bottom would flex and how too small of a hole or snorkel could be catastrophic. And too I didn't have any way to attach a snorkel securely and you'd have to reinforce the lid to prevent flexing there too. I've a 5 gallon gas can though with two threaded holes in the lid that will fit a 2 inch NPT pipe and a 1 inch diameter pipe but again I suspect the lid would flex too much with the added weight of plumbing pipe and it would wear out in no time aside from having to watch out for a blast wave. Flexing bottoms and tops sometimes create a sudden backfire effect for some reason, mixing the fuel and air in some exotic energetic way. Also there've been a few deaths from people who have used the drums to weld on and inadvertently lit the barrel or other foolish cases such as this barrel ride. But wouldn't a real 55 gallon jam jar jet or snorkeler be fun to watch chuffing away steadily?
An acetone drum that had been rinsed.
https://www.youtube.com/watch?v=9DP5l9yYt-g
Man burned in Sedro-Woolley explosion dies
"Perez was burned while trying to “barrel ride” in a parking lot Sunday night by putting four gallons of fuel in a 55-gallon barrel and lighting it on fire. Fire officials say the barrel was apparently supposed to slide across the lot like a rocket, but it blew up."
http://www.seattletimes.com/seattle-new ... sion-dies/
PS Lighting a barrel like this with methanol vapor in an ideal fuel/air ratio on a cool dry air day and the hole size seen here would make nervous big time. But if designed right maybe the statement " even with all of our modifications there is no way we could get it to go fast" might not be true. I bet you could get one to scoot along fairly well with some low friction bicycle-like wheels such as the ones they used and the thrust from a barrel jam jar jet snorkeler.
https://www.youtube.com/watch?v=lktyx9HHesQ
An acetone drum that had been rinsed.
https://www.youtube.com/watch?v=9DP5l9yYt-g
Man burned in Sedro-Woolley explosion dies
"Perez was burned while trying to “barrel ride” in a parking lot Sunday night by putting four gallons of fuel in a 55-gallon barrel and lighting it on fire. Fire officials say the barrel was apparently supposed to slide across the lot like a rocket, but it blew up."
http://www.seattletimes.com/seattle-new ... sion-dies/
PS Lighting a barrel like this with methanol vapor in an ideal fuel/air ratio on a cool dry air day and the hole size seen here would make nervous big time. But if designed right maybe the statement " even with all of our modifications there is no way we could get it to go fast" might not be true. I bet you could get one to scoot along fairly well with some low friction bicycle-like wheels such as the ones they used and the thrust from a barrel jam jar jet snorkeler.
https://www.youtube.com/watch?v=lktyx9HHesQ
Last edited by Mark on Sat Jul 15, 2017 12:17 am, edited 1 time in total.
Presentation is Everything
Re: Jam Jar Car Fun
Sounds like a fun if not daunting project. Along those lines I've thought a self-levitating jam jar jet would be cute if you had light and stiff enough materials for the build. I think if you did, it would be something rather attention getting.Mike Everman wrote:Yeah, that is fun. And seriously, we need to do a jamjar helicopter. I may have to start a thread for that.
Presentation is Everything
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Re: Jam Jar Car Fun
I'm thinking beer can with tangential jet exits or a diverter to make it spin, and fix some superlight rotors to that. Sit it on a bearing so it can get up some spin before lifting off. Theres the issue of being a burning fuel sprinkler, though.
Mike Often wrong, never unsure.
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Re: Jam Jar Car Fun
I just posted a pajama science video of a soda can heli try on my build log.
Mike Often wrong, never unsure.
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Re: Jam Jar Car Fun
A little better rig, trying for a torque motor:
https://www.youtube.com/watch?v=WkxUnm0thwA&sns=em
Fuel sloshes up,but is fortunately not on fire when it does the rainbird
https://www.youtube.com/watch?v=WkxUnm0thwA&sns=em
Fuel sloshes up,but is fortunately not on fire when it does the rainbird
Mike Often wrong, never unsure.
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Re: Jam Jar Car Fun
That little spinner is hilarious. It would probably be to hard to balance with a proper extractor on it....
Stop giving me crazy ideas
Stop giving me crazy ideas
In the process of moving, from the glorified phone booth we had to the house we have.
No real time to work on jets, more space, no time.
Life still complicated.
No real time to work on jets, more space, no time.
Life still complicated.