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Forums
4hv.org :: Forums :: General Science and Electronics
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MICRO pulse jet

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Jim
Sat Jun 17 2006, 02:47AM Print
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
Link2

runs on acetlyne.
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uzzors2k
Sat Jun 17 2006, 01:43PM
uzzors2k Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Nice. How much thrust? You should try making one for a RC plane or car, that would be pretty elite.
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Jim
Sat Jun 17 2006, 04:10PM
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
Not enough thrust for anything, and it runs on a huge tank of acetylene at 10PSI.
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Plasmaniac
Sat Jun 17 2006, 04:44PM
Plasmaniac Registered Member #206 Joined: Sat Feb 18 2006, 03:17PM
Location:
Posts: 72
Ive built 2 valveless pulsjets (loockwood and chinese) some time ago without calculating anything, so they dont work well at all
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joshua_
Sat Jun 17 2006, 05:36PM
joshua_ Registered Member #61 Joined: Thu Feb 09 2006, 05:50AM
Location: Mountain View, CA
Posts: 43
!amazed VERY cool!

It's neat to be able to visualize where all the heat is going (and I guess, where combustion is taking place).

Have you tried it on any other fuels?
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Jim
Sat Jun 17 2006, 06:30PM
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
I have not tried any other fuels yet, I will try MAPP gas and propane today. The problem with propane / mapp gass is that they don't have a quick enough flame front so they wont run a small pulse jet.
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Hazmatt_(The Underdog)
Sat Jun 17 2006, 09:37PM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
just remember as with any compressed fuel, use a backflash valve to keep yourself safe. You don't want the flame following down the fuel line and detonating the cylinder.
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Jim
Sat Jun 17 2006, 10:36PM
Jim Dunce.
Registered Member #28 Joined: Fri Feb 03 2006, 03:29AM
Location:
Posts: 76
I have check valves and backflash arrestors on my assembly.
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Alessandro
Sat Jun 17 2006, 11:11PM
Alessandro Registered Member #70 Joined: Thu Feb 09 2006, 08:19AM
Location:
Posts: 43
How can the cylinder exlpode when it contains no oxygen? confused
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Plasmaniac
Sat Jun 17 2006, 11:24PM
Plasmaniac Registered Member #206 Joined: Sat Feb 18 2006, 03:17PM
Location:
Posts: 72
Jim wrote ...

The problem with propane / mapp gass is that they don't have a quick enough flame front so they wont run a small pulse jet.

crap angry

Using acetylene might do the trick on my pulsejets. Whereas I actually made them just for learning hard-soldering (I've used 900° solder so it wont melt away immediately...)
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