# Questions tagged [wind]

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### How to calculate wind impact to DIY solar panel array frame?

I'm trying to figure out the calculation for amount of force against the poles/ground I have going up out of the ground, to hold an array of 3 solar panels (9ft by 5ft combined roughly), where each ...
21 views

### Which line to use for interpolation in Vaulted Roofs for zone A (EN1991-1-4 / Figure 7.11)

I need to design a vaulted roof under wind loads and need to determine the pressure coefficients for zones A, B and C. My problem is with zone A where I need to interpolate values for the case h/d<...
• 1
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### Estimating yaw torque and power of HAWTs

I am trying to estimate the amount of torque and power required to rotate a 3 bladed Horizontal Axis Wind Turbine (HAWT) about a vertical axis("yaw" motion). I would like to estimate the ...
• 101
151 views

### How strong will this sail pull up?

I am building this ground-mounted solar panel sail: It will sit on twelve 150 mm timber piles. There are 20 panels 1755×1038 mm, 20 kg each, with 17 mm gaps between them, sitting at 69°. The total ...
• 221
92 views

### Wind load distribution on a sawtooth steel roof

I have a steel structure (see picture below) and its roof is a type of sawtooth roof. The plain/flat part is from glass and the inclined surfaces are some kind of pergolas, but I prefer them to be ...
• 1
219 views

### How do 3 blade turbines come so close to the Betz Limit?

I have seen many diagrams (see attached) that indicate that modern 3 blade turbines are nearly 50% efficient, which is about 80% of the Betz limit. Betz calculated his limit based on a theoretical ...
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127 views

### Wind turbines are plastic. How does that "work"? [closed]

You're basically replacing oil with oil in plastic form. Where is the gain? Ok so we got this reply. Not sure if you're trolling but the point is that the windmill makes power as long as it exists ...
1 vote
46 views

### Can I dismiss wind loads for this solar panel configuration?

I asked this question before in the Physics Stack Exchange, but it was closed because it was considered being about engineering. That is why I am asking it here. I am planning to install some solar ...
1 vote