Windmill project

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chrisb
Posts: 19589
Joined: Tue Mar 17, 2015 9:14 am

Re: Windmill project

Postby chrisb » Thu May 23, 2019 8:42 am

bejant wrote:
Thu May 23, 2019 2:42 am
Maybe this attached pdf is better?
That's much better, the postscript didn't show the yellow labels, so I wondered already why you uploaded it anyway.
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Boneshaker
Posts: 69
Joined: Sat Feb 20, 2016 2:20 pm
Location: Emden, Germany

Re: Windmill project

Postby Boneshaker » Thu May 23, 2019 1:22 pm

chrisb wrote:
Mon May 20, 2019 3:46 pm
Boneshaker wrote:
Mon May 20, 2019 3:09 pm
Maybe we make a monthly FreeCAD challenge in the showcase forum to build a library of more complex examples.
:+1:
I prepare something for next month.
The whole assembly will have 26 parts, no puzzle everything has it's place, but a lot of room for pads, pockets, cylinders, chamfers, fillets, work flow ...
Here is a little teaser:
Teaser.PNG
Teaser.PNG (5.48 KiB) Viewed 147 times
NCCALCADA
Posts: 26
Joined: Wed Apr 17, 2019 8:40 am

Re: Windmill project

Postby NCCALCADA » Thu May 23, 2019 2:39 pm

Boneshaker wrote:
Thu May 23, 2019 1:22 pm
I prepare something for next month.
The whole assembly will have 26 parts, no puzzle everything has it's place, but a lot of room for pads, pockets, cylinders, chamfers, fillets, work flow ...
Here is a little teaser:
Teaser.PNG
Nice :)
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freman
Posts: 746
Joined: Tue Nov 27, 2018 10:30 pm

Re: Windmill project

Postby freman » Tue May 28, 2019 5:59 pm

windmill, no nothing to grind.

wind turbine, no, flat fins not aerofoil profile, energy extracted goes with cube of wind speed.

anemometer, possibly.

toy for children to run around with.

Motivation for post: homework : most probably.

"my friend" GF's homework, hoping to impress by saying he did it for her.

Fun rating 9/10.

Now for the real thing. A Freecad model to cut windturbine blades from Piggot's famous Scottish wind generators may actually be useful. I have "a friend" who went on a course and actually made one from Douglas pine, using a spoke shave. One of my general ideas of getting into cnc was that would be a cool thing to make.

http://windempowerment.org/the-piggott-turbine/

one of the neat ideas in this design is the furling hinge, which automatically puts it side-on in the case of strong winds.
This is a very successful, low tech, design with hundreds of working installations. IIRC Piggot originally got a lot of folks in scottish isles, with no grid, energy independent.