alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 19, 2012 22:33:33 GMT -5
Post by alan on Jan 19, 2012 22:33:33 GMT -5
Hello Everyone,
I built a small engine last year that is not fully complete. It runs, but there were some major issues with it. I will begin doing research on gas turbines within the next month to come up with my own solutions.
For now, I can post the project from beginning to present, or post what you need/want to know.
Let me know what you would prefer
~Alan
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Evo III
Jan 20, 2012 0:24:28 GMT -5
Post by racket on Jan 20, 2012 0:24:28 GMT -5
Hi Alan
Welcome to the Group :-)
Post everything , its always nice to see how an engine matures.
Theres plenty of guys on here that can help with advice on getting the engine sorted
Cheers John
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 20, 2012 2:01:43 GMT -5
Post by alan on Jan 20, 2012 2:01:43 GMT -5
Just a little back-round I lived in a small village in the United States. Before i started this hobby i had no prior knowledge piston or jet engines. My only machining skills came from a sconce, dustpan, and toolbox that i made in Ind. Tech. My workbench was a piece of particle board placed over two saw horses.A plastic scale, rusted calipers, two hand drills, half a full set of drill bits, hammer and a jig saw were my metal working tools i had at home. I had to ask help from a lot of people. This is my second engine. The first was built in 2010 out of ALL scraps and had a wooden frame. My dad is a carpenter so i had access to lots of scrap wood. John, you might remember both these projects. I now live in a large city, and attend a 4yr college for aviation maintenance. Over break I showed a friend my engine, and I wanted to start working on it again. Next month i will begin research to learn more about the properties that deal with gas turbines. I know you guys can help me, but I want fully understand the problem and solution. Feel free to correct me when im wrong Pictures coming soon....
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Evo III
Jan 20, 2012 16:49:39 GMT -5
Post by racket on Jan 20, 2012 16:49:39 GMT -5
Hi Alan
LOL, I'm sure we'll add a comment or two when you start to stray off the correct path ;-)
Sounds like you're in the right learning environment for this hobby , are you enjoying the course you're doing ??
Cheers John
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 20, 2012 17:57:12 GMT -5
Post by alan on Jan 20, 2012 17:57:12 GMT -5
Yeah, I really enjoyed my physics and aerodynamics classes. I have a really good base to start off on now. I start my maintenance classes next year. Im getting all the non-major courses taken care of this year.
I was walking through the library and saw some books on machining. If you guys want i can photocopy the pages and post them somewhere.
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Evo III
Jan 20, 2012 19:24:47 GMT -5
Post by racket on Jan 20, 2012 19:24:47 GMT -5
Hi Alan
Yep, physics and maths an absolute must for understanding turbines , throw in some artistic creativity for the design, and you're there :-)
Cheers John
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 20, 2012 20:54:50 GMT -5
Post by alan on Jan 20, 2012 20:54:50 GMT -5
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Evo III
Jan 21, 2012 2:49:18 GMT -5
Post by Johansson on Jan 21, 2012 2:49:18 GMT -5
Do you have the inlet and outlet diameters of each wheel? That would help a lot to estimate the possible performance of the gas turbine.
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 21, 2012 3:01:51 GMT -5
Post by alan on Jan 21, 2012 3:01:51 GMT -5
I do have the measurements, unfortunately they are back at home. Tomorrow i will see if i can get someone to locate my notebook.
I do know the comp inducer is 2.125 inches. The A/R is .70 (i think) and the turb side is 1.15
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Evo III
Jan 21, 2012 11:44:34 GMT -5
Post by turbochris on Jan 21, 2012 11:44:34 GMT -5
nice work, what city do you live in?
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Evo III
Jan 21, 2012 13:45:46 GMT -5
Post by ernie wrenn on Jan 21, 2012 13:45:46 GMT -5
At last we got pictures... Good job with the amount of tools. Been there done that..
ernie
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 21, 2012 14:55:46 GMT -5
Post by alan on Jan 21, 2012 14:55:46 GMT -5
Chris,
I currently live in Kalamazoo, MI
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Evo III
Jan 21, 2012 16:37:26 GMT -5
Post by racket on Jan 21, 2012 16:37:26 GMT -5
Hi Alan
Nice job :-)
Cheers John
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 21, 2012 18:49:02 GMT -5
Post by alan on Jan 21, 2012 18:49:02 GMT -5
Thanks guys Here is the injector in the lathe. This was the first time I used a metal lathe. I was thrilled about how precise you can be with the lathe. Plus it was fun to use lol It was a little hard to cut the threads with the large channel locks. I milled four flats on the end so it fits nicely in the middle of the evap stems. Then two more flats so it can be tightened. ( I messed up two of these so the ones in the pictures might look slightly different.) This is the side the fuel enters through. I may of accidentally drilled through the other end just a tad... Bud welded it back shut though This is the end cap where the injector will thread through. Drilling those little holes with the mill was a pain. I drilled a counter-bore most of the way then finished with a .7mm drill bit. A month later i bought a mini keyless chuck for my dremel which works great with the .7mm drill bits.
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alan
Member
Joined: August 2010
Posts: 36
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Evo III
Jan 22, 2012 21:07:28 GMT -5
Post by alan on Jan 22, 2012 21:07:28 GMT -5
There are some gaps in the progress shown by the pictures because I forgot to bring my camera a couple days. Here will be the hole for air entry. I used a press bent exhaust pipe, the ID of the turbo outlet is 1.75" and the ID of the exhaust pipe is 2" so i figured there wouldn't be any restriction due to the area reduction from the bend. The FT and FT cap fit perfectly with just enough room for expansion three large metal washers perfectly aligned the injector with all for evap tubes.
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