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IT WORKED *pics* Gas Turbine Engine
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WGP guy2 View Drop Down
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    Posted: 07 April 2007 at 7:52pm
*UPDATE*

So I fired it up today.  I turned on the propane, turned on the blower, turned on the ignitor...and nothing happened.  I messed with it for about an hour and finally got a few flames.  Then I messed with it some more, got it to catch on fire a few times, and finally, a sustained flame.  Very cool blue flame was inside of it, I had it on the only mixture setting I could get to work. It didn't make too much thrust, but it was enough that my body got hot standing 5 feet behind it. The duct tape you see on the back was to restrict airflow, it was temporary and will be replaced with metal when I get back from Daytona.   Pics of it working:







*ORIGINAL*



So, with the temporary pause in schoolwork (spring break) I decided to start a new project, a gas turbine engine (turbojet engine).  I've had much interest in them and have a very good understanding of how they work, enough that with a little research I made a plan to build one.

So, I went to Home Depot, and spent about $50 on parts (and another $30 in tools) to build one.

I'm nearly finished with the burner, which I will be testing before I add a compressor and turbine to it.  The burner is the part that takes the real engineering on my part, so it will be the thing that takes the longest.

I am almost finished with the first try at a burner, I have everything installed (outer casing, inner casing (burner can), propane line, and nozzle) except the ignition system, which I have sitting right beside me but I don't feel like putting in right now.

Hopefully I will fire this thing up for a trial run tomorrow, however I'm leaving tomorrow night to go to Daytona Beach, so it might be the end of this week.  I will get more pics and probably a vid when I get it running good.  Some pics:










Edited by WGP guy2 - 08 April 2007 at 5:38pm
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Are you just making the engine or is it gona be mounted on something?
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Thats all way over my head.  Good Luck.
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Originally posted by carl_the_sniper carl_the_sniper wrote:

Are you just making the engine or is it gona be mounted on something?


Depends on how much thrust it makes.  I'm not completely sure, the only calculations I've done were to make sure it wasn't going to melt.
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Cool, get a video incase you kill yourself.    
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MMMMmmmm, secky.
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Originally posted by WGP guy2 WGP guy2 wrote:

Originally posted by carl_the_sniper carl_the_sniper wrote:

Are you just making the engine or is it gona be mounted on something?


Depends on how much thrust it makes.  I'm not completely sure, the only calculations I've done were to make sure it wasn't going to melt.

damn, just fix it to a go cart and drive... ok maybe not
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It looks like a pipe bomb. Be careful what windows you leave that next to.
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Originally posted by carl_the_sniper carl_the_sniper wrote:

Originally posted by WGP guy2 WGP guy2 wrote:

Originally posted by carl_the_sniper carl_the_sniper wrote:

Are you just making the engine or is it gona be mounted on something?


Depends on how much thrust it makes.  I'm not completely sure, the only calculations I've done were to make sure it wasn't going to melt.

damn, just fix it to a go cart and drive... ok maybe not



Well at the moment it has to be hooked up to a blower (shop vac at the moment) to provide the air for it.  However that will be replaced with the compressor and turbine later.  Maybe then I will put it on a go-kart frame.  And if it doesn't make enough thrust, I can always put an afterburner on can't I?


Edited by WGP guy2 - 07 April 2007 at 10:03pm
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Originally posted by WGP guy2 WGP guy2 wrote:

Originally posted by carl_the_sniper carl_the_sniper wrote:

Originally posted by WGP guy2 WGP guy2 wrote:

Originally posted by carl_the_sniper carl_the_sniper wrote:

Are you just making the engine or is it gona be mounted on something?


Depends on how much thrust it makes.  I'm not completely sure, the only calculations I've done were to make sure it wasn't going to melt.

damn, just fix it to a go cart and drive... ok maybe not



Well at the moment it has to be hooked up to a blower (shop vac at the moment) to provide the air for it.  However that will be replaced with the compressor and turbine later.  Maybe then I will put it on a go-kart frame.  And if it doesn't make enough thrust, I can always put an afterburner on can't I?

Make a ramjet, plenty of thrust... lol

How are you planning on making the turbine?

Wouldn't the turbine eliminate the need for a compressor?

Afterburner would be cool but I really dont know what would be involved. Sounds like you'd just be increasing the number of things that could go horribly wrong.



Edited by carl_the_sniper - 07 April 2007 at 10:16pm
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I have no idea what's going on, but I now want to build one...

I demand vids of it when it's finished.
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Originally posted by carl_the_sniper carl_the_sniper wrote:

Make a ramjet, plenty of thrust... lol

How are you planning on making the turbine?

Wouldn't the turbine eliminate the need for a compressor?

Afterburner would be cool but I really dont know what would be involved. Sounds like you'd just be increasing the number of things that could go horribly wrong.



A ramjet requires an auxillary source of air, so either I would have to keep the shop vac on there or have another way of moving the engine at a considerable speed before it could be lit, plus adding a compressor and turbine isn't that hard.

No, a turbine does not eliminate the need for a compressor, the compressor brings air into the engine, the turbine simply uses the force generated by the burner to run the compressor.

No, an afterburner does not add to complexity, it would, in fact, be the most simple thing on there.  All an afterburner is is throwing more fuel into the exhaust, which ignites it making more thrust.

I already have the compressor/turbine, but it won't be installed until I'm sure the burner functions how I would like it to.


Edited by WGP guy2 - 07 April 2007 at 11:15pm
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Originally posted by DeTrevni DeTrevni wrote:

I have no idea what's going on, but I now want to build one...


I demand vids of it when it's finished.



Agreed, on both counts.

Could you explain the basic principle?
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Originally posted by Pariel Pariel wrote:

Originally posted by DeTrevni DeTrevni wrote:

I have no idea what's going on, but I now want to build one...


I demand vids of it when it's finished.



Agreed, on both counts.

Could you explain the basic principle?


Air goes in, stuff goes boom, hot air comes out?

Honestly, you'll have to figure it out for yourself.  I did it all by myself, and it wouldn't do either of us any good for me to explain it.  Anyone wanting to attempt this should do some major research.  Be familiar with all of the things happening in such an engine, be aware of the necesity for great accuracy in certain situations.  For example, a vortex of air has to be created within the inner casing, if it isn't present, a stable burn can't really be established.

If you can't figure out how to make one by doing research, and looking at examples to get a firm understanding (not saying that you are incapable), then you have no business trying.

Be aware that the temperatures involved are great, and the fuel also poses somewhat of a danger.  If you screw up, it may just not work, or it may cost you greatly.
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so is it kinda like a turbocharger that'll spit out fire?
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Originally posted by chronic future chronic future wrote:

so is it kinda like a turbocharger that'll spit out fire?



To put it bluntly, yes.  Its nearly the same thing you would find on your average turbojet powered airplane, except it is a little less complex and isn't linear.
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Originally posted by WGP guy2 WGP guy2 wrote:

Originally posted by chronic future chronic future wrote:

so is it kinda like a turbocharger that'll spit out fire?



To put it bluntly, yes.  Its nearly the same thing you would find on your average turbojet powered airplane, except it is a little less complex and isn't linear.

pretty hardcore seeing how you're building it yourself, attach it to a mailbox/random fixed objects ect...
 
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Originally posted by WGP guy2 WGP guy2 wrote:

Originally posted by carl_the_sniper carl_the_sniper wrote:

Make a ramjet, plenty of thrust... lol

How are you planning on making the turbine?

Wouldn't the turbine eliminate the need for a compressor?

Afterburner would be cool but I really dont know what would be involved. Sounds like you'd just be increasing the number of things that could go horribly wrong.



A ramjet requires an auxillary source of air, so either I would have to keep the shop vac on there or have another way of moving the engine at a considerable speed before it could be lit, plus adding a compressor and turbine isn't that hard.

The ramjet was a joke. I know you would need extreme speed to get it to work. The shop vac wouldn't be enough to work I don't think
No, a turbine does not eliminate the need for a compressor, the compressor brings air into the engine, the turbine simply uses the force generated by the burner to run the compressor.

Yeah, damn forgot basic jet engine mechanics lol.

No, an afterburner does not add to complexity, it would, in fact, be the most simple thing on there.  All an afterburner is is throwing more fuel into the exhaust, which ignites it making more thrust.

ok, but I think if you were to actually mount it on something like a go-cart chassis, safety could come into play

I already have the compressor/turbine, but it won't be installed until I'm sure the burner functions how I would like it to.

And chronic future, think of it as more of a basic jet engine.

Anyone interested but has no clue what's going on should do some research, look up ramjet engines and their relation to turbojet engines. It's actually very simple if you find a good source.

i think that if you sucessfully made a very stable and safe version, this could have huge applications to larger-scale rc aircraft.

 



Edited by carl_the_sniper - 08 April 2007 at 12:10am
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Okies, to demonstrate that I'm not a total newb, I have had an interest in rocketry for a while now (say, 13 out of my 18 years of life...), and would like to move beyond Estes.

Do you think this model can be lightened enough, or enough thrust be produced from this model to escape Earth's gravity? Maybe just enough duration to get a few hundred feet would impress me...

A reusable, liquid-fueled rocket. Mmmm...
But I'd probably need a more combustable source of fuel than gasoline, wouldn't I?
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Originally posted by DeTrevni DeTrevni wrote:

Okies, to demonstrate that I'm not a total newb, I have had an interest in rocketry for a while now (say, 13 out of my 18 years of life...), and would like to move beyond Estes.

Do you think this model can be lightened enough, or enough thrust be produced from this model to escape Earth's gravity? Maybe just enough duration to get a few hundred feet would impress me...

A reusable, liquid-fueled rocket. Mmmm...
But I'd probably need a more combustable source of fuel than gasoline, wouldn't I?

well first thing, it's not a rocket.

I can't answer the second part, he probably can

Once again, not a rocket

This is really, a basic jet engine.
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