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Windmill Vertical axis

by Nalwan Dec 5, 2015
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This is great idea, so one can experiment without destroying the original fan parts like others have done.

Can you explain exactly how you print and assemble this thing... I'm trying to make one, and I am guessing from your picture you glue it.... but I am confused because you got two different versions of the "windmill" blades... one is 30 degrees and the other one isn't????? Please let me know because I already printed part of it.

you have to print 4 "windmill blades" : 2 from EolecA.stl and 2 from EolecA-30.stl.
The angle between 2 level is 30°, that's why the hexagonal hole is rotated for the EolecA-30.stl model.
The assembly is composed by ordering as follow :

-Pulley (only if a fan is used as support)
-1st level : EolecA.stl
-2nd level : EolecA-30.stl
-3rd level : EolecA.stl
-4th level : EolecA-30.stl
-5th level : Top end.stl

a standard pencil (hexagonal extrusion) is used as an axis.

I didn't need glue for my assembly since the dimensions of the pencil i used match perfectly with the hexagonal hole but you can glue it if needed.

Let me know if any questions. This is an old concept, i made some improvement since this upload but i didn't upload it yet.

Thank you very much for explaining how you made it. I was able to print everything, and almost about to put it together. The only problem I have now is the pencil I have are to thick for the hole. Did you use a "skinny" pencil? Again, I appreciate the comments. If I can't find a pencil, I'll just CAD design something that fits the hexagonal hole. If you have any improvements I would very much like to see those designs, as I think this is a very good design for a lateral windmill (and that's why I am excited to test it). My final touch (I hope) is to hook it up to some kind of motor and use a multi-meter to see how much electricity it generates. THANKS FOR SHARING!

The pencil i used is a common wood pencil, distance between faces is 6.7mm. On 3D model, after few trys i've adjusted the dimension to 6.75mm, but depending on material (i'm using PLA), adjustment might be a bit tight. Sorry about that.
With this relative small size, the power generated will be about the same as an usb power source (less than 5w).
Improvements i did require to print new blades, it's probably better to keep yours if already printed. I'll take time to upload it in the near future.

Thanks for your comments, i appreciate your interrest.

Orr you could just print a hexagon dowel and use that instead of a pencil.

I didn't try it, I fear that hexagon dowel printed layer by layer would be not strong enough to resist at shearing. But if you make it, let me know about result, if it works, i'll add dowel stl with your contribution. Dowel length should be 160mm, that's a second reason to figure out a alternative way.