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Jet Engine Mini
Posted: Tue Aug 05, 2008 8:29 am
by brplatz
i saw some videos of jet engines i and wanted to build one but they are much to expensive for me
so i made one that looks like its a jet engine!!
sorry bad quality
http://s284.photobucket.com/albums/ll32 ... 211300.flv
better
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
Posted: Tue Aug 05, 2008 8:38 am
by Carlman
the second video is not public BTW
is that just a propane line going in?
and what fan is it
Posted: Tue Aug 05, 2008 8:39 am
by brplatz
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
Posted: Tue Aug 05, 2008 9:13 am
by Gippeto
Cool burner.
Have you tried syphon nozzles?
Posted: Tue Aug 05, 2008 10:19 am
by brplatz
syphon nozzles look fun
is that one yours? i was planning on making a pulse jet first but maybe i changed my mind!
Posted: Tue Aug 05, 2008 11:31 am
by noob of noobs
...Why do you want to build a jet engine?
Posted: Tue Aug 05, 2008 12:01 pm
by jackssmirkingrevenge
noob of noobs wrote:Why do you want to build a jet engine?
If you can, why not
Posted: Tue Aug 05, 2008 12:04 pm
by Larda
Nice, now just build a larger one.
This is a pulse jet i made some time ago:
http://www.vimeo.com/893878
jackssmirkingrevenge:
Exactly!
Posted: Tue Aug 05, 2008 1:29 pm
by Gippeto
@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))
Posted: Tue Aug 05, 2008 2:11 pm
by SEAKING9006
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.
Posted: Tue Aug 05, 2008 2:16 pm
by bob-a-lu
thats so freaking amazing ive been wanting to make one but havnt.(parents wont buy me propane)
Posted: Tue Aug 05, 2008 2:23 pm
by SEAKING9006
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.
Posted: Tue Aug 05, 2008 2:29 pm
by Coodude26
jackssmirkingrevenge wrote:noob of noobs wrote:Why do you want to build a jet engine?
If you can, why not
I'm working on a mini oxygen bar based on electrolysis for myself - why? Because I can, and its cool
Posted: Tue Aug 05, 2008 4:45 pm
by brplatz
@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
Posted: Tue Aug 05, 2008 6:08 pm
by Gippeto
If I used the correct spelling it would help your search eh?
SIPHON nozzles are pretty simple, at least in theory.
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.