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Old 3rd August 2012, 8:30 PM   #1
8MadDog8 Thread Starter
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Default Worklog: 8MadDog8's DIY Gas Turbine

Hey All

So i have been wanting to make one of these for years now, so i thought i may as well get around to it

If anyone is interested, there is a ton of info here:
http://tech.groups.yahoo.com/group/DIYGasTurbines/
and
http://jetandturbineowners.proboards.com/index.cgi

With a bit of a diagram of the setup:



I started this about a month or something ago, and here is where i am up to so far after just working on it a couple of nights each week.

Managed to find a turbo from a guy at work. Nothing special, an old Schweitzer turbo that was originally off a Ford 7000 tractor. Fairly small as it has a 40.6mm compressor inducer, but it will do the job.


Pulled it all apart and gave it a good clean. Cant feel any movement in the bearing, so fingers crossed. Just hoping the oil seals will be in good nick, but the guy i got it off said it was running fine when it was taken off the tractor a few years ago.


The turbo didnt come with and flanges for the oil inlet/outlet, so just used some MS plate lying around.


Next was the flange for the turbine inlet. Just made from the same MS plate. Had to borrow a neighbors oxy to blow the center part out, and then cleaned it up with the die grinder.


Finished flanges. Do like the brushed steel look :P
Still need to tap the oil inlet/outlet, but will wait until i buy the fittings.


Nice bit of 150NB offcut from work


And this 2" 90deg bend will serve as the inlet to the combustion chamber.


Grabbed this fire extinguisher to act as the oil reservoir. Its a little big, but will be fine. Also should keep the oil at an ok temperature without needing a cooler.


Come up pretty good with the paint removed


Took a bit of work to get the combustion chamber outlet to merge with the turbine inlet flange, but nothing an oxy and a 1.5lb hammer cant fix
Actually come up better that i hoped.


Its pretty handy having access to a profile cutter at work


Mock up of the combustion chamber. Have flanges at both top and bottom so i can split it at either end if needed.


Hole marking for all 4 flanges. 8 M12's each end should be more than enough


Glad i had a nice sharp bit and was only drilling MS


Combustion chamber outlet tacked into position.


Whole combustion chamber tacked into position to make sure everything lines up correctly before its fully welded


And all bolted up, just to make sure


Mounted on the turbo. You might notice the size of the chamber is pretty big, thought about going smaller, but its easier to setup one that is bigger than trying to tune something smaller, and this would be good for a first time.
Also, in the later photos, i cut around 2" off the chamber outlet, to make it a little smaller.


Oxy made light work of cutting out the chamber inlet


Combustion chamber inlet tacked into position. Used the die grinder to clean the hole up and make the pipe fit. Im so glad i wont need to use the die grinder anymore, im still picking burrs out of my skin.....


Outlet welded up.


And combustion chamber fully welded.


Hmm 150NB pipe, 8mm plate, all fully welded, think it has a safety factor of 1000 haha
But isn't the key to being an engineer to over engineer everything


Cut out a little ring and tacked it to the top plate, just top hold the flame tube in position.


Flametube (4" SS) marked up with hole pattern. 4mm for the primary, 6mm secondary, and 11mm for the tertiary.
Basically the total hole area needs to equal the area of the compressor inducer.


Drilling 50+ holes was not the most enjoyable task of the project


Flametube done.


Sitting nicely in the top cover.


And hopefully this will work pretty good right from the get-go.



So there is still a fair bit to go, but the big jobs are out of the way.
Just need to sort out the fuel system, oil system, ignition system, instrumentation, and build a frame (and probably a few other things haha).

Hope to get a couple of things done this weekend. Will update when i can.

Cheers
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Old 3rd August 2012, 8:35 PM   #2
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Don't know much about these things but that looks awesome mate! You must be some kind of welder, or have access to a mig by the looks.
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Old 4th August 2012, 6:51 PM   #3
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Looks good, what will you use it for, here's one idea, site has been around for years............

http://www.asciimation.co.nz/beer/
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Old 6th August 2012, 5:35 AM   #4
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Quote:
Originally Posted by Gonadman2 View Post
Don't know much about these things but that looks awesome mate! You must be some kind of welder, or have access to a mig by the looks.
Haha cheers mate, but im no boily and thats all just done with my trusty stick welder

Quote:
Originally Posted by Lespom View Post
Looks good, what will you use it for, here's one idea, site has been around for years............

http://www.asciimation.co.nz/beer/
Yeah seen that around before. Dont really have much use for it at the moment. I just like building things, and thought it would be good to see if i can make one of these
Might get mounted on a go-cart if successful
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Old 8th August 2012, 5:37 AM   #5
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Just a small update.

Tonight i managed to make the gas nozzle that will be supplying fuel to the combustion chamber. Just a simple brass plug with the flats drilled out and a hole down the centre.
Also, tapped a hole for the sparkplug.



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Old 8th August 2012, 10:17 AM   #6
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Dude that is EPIC! I'll be following this closely. It's also a brilliant example of fantastic hand skills - Awesome work MadDog
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Old 9th August 2012, 9:23 AM   #7
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Words
I have none.


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Old 10th August 2012, 5:39 AM   #8
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So thought i would post a couple of pics of the parts ive been collecting over the last few weeks.

Oil, boost and pyro gauges.


This is the ignitor that i got from a like minded enthusiast in the US. Was easier paying 20 bux, then trying to make one myself haha
This thing produces a bloody good spark


Just the gas hose, with a ball valve as a quick shutoff just in case


And oil pump and filter with all the fittings. Will give 60psi which should help the turbo survive


Bought a length of 30mm SHS, so i can make the frame. Hoping to get a bit done on the weekend
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Old 10th August 2012, 6:27 AM   #9
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Epic! As a tinkerer too I had to get subbed!
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Old 10th August 2012, 1:07 PM   #10
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can you mount this to your bicycle?
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Old 10th August 2012, 1:17 PM   #11
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Will be interesting to see the outcome.
You do have a spare fire extinguisher on hand right?
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Old 11th August 2012, 1:53 PM   #12
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Looks awesome. Can't wait for video at end
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Old 14th August 2012, 5:37 AM   #13
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Quote:
Originally Posted by Alby1976 View Post
Will be interesting to see the outcome.
You do have a spare fire extinguisher on hand right?
Yeah think i might get another one

Anyway, got a couple of things done on the weekend.

Boost and pyro sensor fittings welded on, as well as turbo oil inlet/outlet fittings


And fittings welded on the oil tank
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Old 14th August 2012, 6:07 AM   #14
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This is so good. You are clearly a mentalist, but genius at the same time.

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Old 14th August 2012, 7:30 PM   #15
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Keen to see what it's used for. SUBBED!!!
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