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Jet Engine Mini

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Jet Engine Mini

Unread postAuthor: brplatz » Tue Aug 05, 2008 8:29 am

i saw some videos of jet engines i and wanted to build one but they are much to expensive for me :D so i made one that looks like its a jet engine!!

sorry bad quality
http://s284.photobucket.com/albums/ll32 ... 211300.flv

better
http://www.vimeo.com/1468968

the first one i got the fan to half speed and the last one i barely got it up.
my dad wasnt to happy about this on the garage floor :shock:
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Last edited by brplatz on Tue Aug 05, 2008 10:51 am, edited 1 time in total.
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Unread postAuthor: Carlman » Tue Aug 05, 2008 8:38 am

the second video is not public BTW

is that just a propane line going in?

and what fan is it
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Unread postAuthor: brplatz » Tue Aug 05, 2008 8:39 am

ok i fixed the video
its a copper line with a small wide spread nozzle
its an old pc fan on 18v with speed switch
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Unread postAuthor: Gippeto » Tue Aug 05, 2008 9:13 am

Cool burner. :)

Have you tried syphon nozzles? :)
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Syphon burner prototype. Burning a mix of WMO and diesel @ 80psi. 2 liters every 15 minutes. Non flash photography showing IR and near IR zones.
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Unread postAuthor: brplatz » Tue Aug 05, 2008 10:19 am

syphon nozzles look fun :D

is that one yours? i was planning on making a pulse jet first but maybe i changed my mind! :D
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Unread postAuthor: noob of noobs » Tue Aug 05, 2008 11:31 am

:shock:

...Why do you want to build a jet engine?
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Unread postAuthor: jackssmirkingrevenge » Tue Aug 05, 2008 12:01 pm

noob of noobs wrote:Why do you want to build a jet engine?


If you can, why not :D
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Unread postAuthor: Larda » Tue Aug 05, 2008 12:04 pm

Nice, now just build a larger one. :D
This is a pulse jet i made some time ago:
http://www.vimeo.com/893878

jackssmirkingrevenge:
Exactly! :D
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Unread postAuthor: Gippeto » Tue Aug 05, 2008 1:29 pm

@brplatz;

Yes it's mine. 2nd version. I was tinkering with waste oil burners at the time.

If you're after thrust, stick with the pulse jet. All mine does is make a LOT of heat. (And a Ridiculous amount of noise. 8) (Although version 2 is substantially quieter than version 1))
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Unread postAuthor: SEAKING9006 » Tue Aug 05, 2008 2:11 pm

I've though about building a turbojet engine based on the GR-1 here and using the GR-1 combustor formula.

Although it's not quite a jet engine, thats a nice little afterburning ducted-fan you got there.
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Unread postAuthor: bob-a-lu » Tue Aug 05, 2008 2:16 pm

thats so freaking amazing ive been wanting to make one but havnt.(parents wont buy me propane)
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Unread postAuthor: SEAKING9006 » Tue Aug 05, 2008 2:23 pm

If you still live with your parents, I STRONGLY URGE YOU not to try anything remotely like a jet engine, unless you have been through Chemistry and Physics, and have a strong background in knowledge of the reactions taking place and the mechanical tolerances required to make the thing not catastrophically fail and sent shrapnel everywhere, possibly killing someone.

I really would feel better about you waiting until you have your own land, plenty of money, and the technical knowledge needed to build one of these.



And for gods sakes, IF IT GLOWS RED YOU'RE HEATING IT UP TOO MUCH.
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Unread postAuthor: Coodude26 » Tue Aug 05, 2008 2:29 pm

jackssmirkingrevenge wrote:
noob of noobs wrote:Why do you want to build a jet engine?


If you can, why not :D


I'm working on a mini oxygen bar based on electrolysis for myself - why? Because I can, and its cool :D
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Unread postAuthor: brplatz » Tue Aug 05, 2008 4:45 pm

@gippeto

could you explain the way your syphon nozzle works?
i searched but couldnt really figure it out.

@larda

I am interested in making a pulse jet buti want a somewhat small one that wouldnt be to hard to make. i have access to a sweet machining lathe if that helps :D
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Unread postAuthor: Gippeto » Tue Aug 05, 2008 6:08 pm

If I used the correct spelling it would help your search eh?


SIPHON nozzles are pretty simple, at least in theory. :wink:

Air blowing through a chamber, creates a vacuum, which "siphons" the oil/diesel up to the chamber.

The high velocity air stream then breaks the oil into small droplets.(atomizing)

That is a siphon nozzle simplified.

And then the important part...The droplets hit the "burn tube" , vaporize (you can't burn liquids, only vapours), mix with the additional incoming "combustion" air, and ignite.

Getting it all to work "together" is the fun part. :wink:
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