Thousand year-old windmills in Iran (2017)
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Thousand year-old windmills in Iran (2017)
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Re: Thousand year-old windmills in Iran (2017)
#2As an Iranian, this is the first time I hear about these windmills! Unfortunately, the only source of info about them is this National Geography video.
There is no exclusive page for them on wikipedia, but I could find how they work generally here: https://en.m.wikipedia.org/wiki/Panemone_windmill
Re: Thousand year-old windmills in Iran (2017)
#3So they were trying to enrich Uranium and acquire nukes 1000 years ago already!
Re: Thousand year-old windmills in Iran (2017)
#4So they were trying to enrich Uranium and acquire nukes 1000 years ago already!
Please leave non-substantive comments for elsewhere; the reason people come back to HN is because of the high quality comments.
Re: Thousand year-old windmills in Iran (2017)
#5So they were trying to enrich Uranium and acquire nukes 1000 years ago already!
Please leave non-substantive comments for elsewhere; the reason people come back to HN is because of the high quality comments.
And your's is one of that substantive comments?
By the way I come because of the news ... the comments more or less worthless for me.
Re: Thousand year-old windmills in Iran (2017)
#6Earlier quoted context omitted.
Please leave non-substantive comments for elsewhere; the reason people come back to HN is because of the high quality comments.
And your's is one of that substantive comments? By the way I come because of the news ... the comments more or less worthless for me.
Yes it is as he's explaining what's generally accepted here (not downvoted). Maybe you do not usually read the comments but it's often discussed. And your personal case does not make it less valid.
Re: Thousand year-old windmills in Iran (2017)
#7So they were trying to enrich Uranium and acquire nukes 1000 years ago already!
"Eschew flamebait. Don't introduce flamewar topics unless you have something genuinely new to say. Avoid unrelated controversies and generic tangents."
Re: Thousand year-old windmills in Iran (2017)
#8This is so cool!
Re: Thousand year-old windmills in Iran (2017)
#9As an Iranian, this is the first time I hear about these windmills! Unfortunately, the only source of info about them is this National Geography video. There is no exclusive page for them on wikipedia, but I could find how they work generally here: https://en.m.wikipedia.org/wiki/Panemone_windmill
That wiki page suggests that the sails are articulated? In the video these are very much fixed sails - looks like battens of woods lashed or nailed together so I don't think the sails themselves can turn.
I do wonder which way the prevailing wind is for those windmills though as they are surrounded by walls. The knee jerk reaction is that the wind comes "face on" but then surely there would not be a turning force if the wind blows on both sides of the axis equally (especially since the sails look to be fixed)
I did notice there was a small vertical slit on the back wall, which makes me wonder if the wind blows "sideways" and generates lower pressure by blowing over the slit, causing the sails to move.
Re: Thousand year-old windmills in Iran (2017)
#10As an Iranian, this is the first time I hear about these windmills! Unfortunately, the only source of info about them is this National Geography video. There is no exclusive page for them on wikipedia, but I could find how they work generally here: https://en.m.wikipedia.org/wiki/Panemone_windmill
That wiki page suggests that the sails are articulated? In the video these are very much fixed sails - looks like battens of woods lashed or nailed together so I don't think the sails themselves can turn. I do wonder which way the prevailing wind is for those windmills though as they are surrounded by walls. The knee jerk reaction is that the wind comes "face on" but then surely there would not be a turning force if…
I would guess the wind blows into the slit, driving just one side of the paddle.