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moody
Mad Scientist
USA
326 Posts |
 Posted - Oct 08 2005 : 10:53:46 AM
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Whats the easiest type of jet engine out there to build from nothing at all?
ive always wanted to build one but never really done it.
to me it looks like the pulse jets are the easiest
just a pipe in the shape of a U and a bigger chamber with spark and fuel inlet one one side and the other side is the output
anyone have any tips?
"I reject your reality and substitute my own" -Adam Savage (Myth busters)
Edited by - Aaron Cake on Oct 10 2005 10:21:21 AM |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Oct 08 2005 : 5:29:58 PM
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I posted an article in another thread of a guy using a car's turbo to make a jet turbine. He used fuel escaping from a propane tank to cool his beer. The tank got cold. He couldn't just let the propane go into the air, so he burned it in the noisy jet turbine.
I also posted an article about a pulse jet engine. In the video, the "flame-out" when it ran out of gas was spectacular.
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Oct 08 2005 : 5:32:24 PM
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What happened? In the middle of typing it said, "Thankyou for posting" and it posted itself a dozen times.
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moody
Mad Scientist
USA
326 Posts |
Posted - Oct 09 2005 : 12:32:18 AM
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i saw that turbo one and the beer one
i think im going to make a pulse jet engine because it looks really easy
I can search the web for some plans for one but if anyone knows some sites that explain the building process clearly please post a link here
"I reject your reality and substitute my own" -Adam Savage (Myth busters) |
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moody
Mad Scientist
USA
326 Posts |
Posted - Oct 09 2005 : 12:57:20 AM
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is this all there really is to it?
http://www.beck-technologies.com/images/gallerypiclockwood1.jpg
just looks like some pipe bent into a U and a gas chamber at one end with a sparker
looks really simple...too simple
"I reject your reality and substitute my own" -Adam Savage (Myth busters) |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Oct 09 2005 : 1:47:05 PM
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If it looks too simple, then it is too simple.
I think you need a valve to close at the air intake when the fuel mixture has been injected, to keep the blast going out the exhaust instead of out the intake.
Maybe you could make the air intake smaller than the exhaust.
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cirvin
Nobel Prize Winner
USA
1542 Posts |
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moody
Mad Scientist
USA
326 Posts |
Posted - Oct 10 2005 : 12:56:29 AM
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quote:
If it looks too simple, then it is too simple.
I think you need a valve to close at the air intake when the fuel mixture has been injected, to keep the blast going out the exhaust instead of out the intake.
Maybe you could make the air intake smaller than the exhaust.
the web page says thats a valveless engine
and as you can see here
http://www.home.no/andreas.sunnhordvik/English/mechanical/valveless_e.htm
the intake is smaller than the exhaust
"I reject your reality and substitute my own" -Adam Savage (Myth busters)
Edited by - moody on Oct 10 2005 01:01:48 AM |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Oct 10 2005 : 04:15:46 AM
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With the air intake pointing towards the rear for its thrust, I think this engine would have trouble with a vacuum at its air intake if it was travelling at a good speed.
It is funny to see a flame coming out the intake, but nothing at the exhaust.
He doesn't use a checkvalve at the propane cylinder. I wonder how spectacular is the explosion of the tank caused by "flame-out" when it runs out of gas.
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 10 2005 : 10:20:38 AM
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Moving from Other Circuits to Mechanical...
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Oct 10 2005 : 10:25:39 AM
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Pulse jet is easiest. All you need to do is basically bend up the tubes, assemble the combustion chamber and weld it all together. I think it's already been covered in this thread.
A turbojet is much cooler, but significantly more complicated. I've been meaning to build one for years, but everytime I come accross a large turbocharger I save it for use on an RX-7. 
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moody
Mad Scientist
USA
326 Posts |
Posted - Oct 13 2005 : 11:46:14 AM
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quote:
With the air intake pointing towards the rear for its thrust, I think this engine would have trouble with a vacuum at its air intake if it was travelling at a good speed.
It is funny to see a flame coming out the intake, but nothing at the exhaust.
He doesn't use a checkvalve at the propane cylinder. I wonder how spectacular is the explosion of the tank caused by "flame-out" when it runs out of gas.
yea
i would definitely put in a check valve
"I reject your reality and substitute my own" -Adam Savage (Myth busters) |
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guitarfreak
Apprentece
New Zealand
6 Posts |
Posted - Feb 19 2006 : 11:52:06 PM
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I agree with the pulse-jet idea. Have you guys ever seen "Junkyard Wars"? One of the challenges was to build a jet-propelled car, and one team made a pulse-jet. it was really simple, and worked ok.
Save the trees,eat a beaver :-) |
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Aaron Cake
Administrator
Canada
6718 Posts |
Posted - Feb 20 2006 : 1:55:17 PM
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Yes, I remember watching that episode. The pulse jet worked very well, but then again so did the turbojet until the turbo blew it's oil seals.
I my opinion, turbojets are much cooler but it's of course significantly easier to build a pulse jet.
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Topic |
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Want to build a jet engine
