# Tag Info

Accepted

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

I'll try to do a very naive (napkin) calculation. (The way the question is formed does not warranty -IMHO- a more detailed/diligent calculation). (Also, apologies in advance, but it's been over a ...
• 23.1k

### What size feet for this wind-protection panel?

The proposed system won't work, as the foot straps are too flexible to prevent the large deflection and rotation of the posts. Instead, you shall embed the posts into the foundation (not shown) below ...
• 7,776

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

From your units, I'm assuming you're based in the US ? Have a look at the skyciv online wind calculator : https://skyciv.com/wind-load-calculator/ It has support for sussing out wind loads to ASCE7-16....
• 124

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

Every once in a while questions like this come out of the woodworks, usually with a tone similar to other key-board warriors we have heard before. you don't know if it's a tease or a genuine deep ...
• 21.4k

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

The Betz limit is based on an extremely crude model for an actuator disk. If you want to compare the performance of the product of a billion dollar industrial development program, let's at least use a ...
• 4,020
1 vote

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

The wind turbines basically extract energy from the moving air. The Betz limit is essentially the maximum percentage of energy that is possible to extract from the air (the limit has to do with the ...
• 23.1k
1 vote

### How strong will this sail pull up?

Another thing you need to consider, is the maximum wind pressure that the panels will experience for the calculation -- much depends on this. In the other answers, it's not explicitly mentioned what ...
• 23.1k
1 vote

### How strong will this sail pull up?

Unfortunately, the correct answer is not the accepted answer. Wind code has several load combinations that you need to verify and also pick the scheme that best fits your application and finally ...
• 21.4k
1 vote
Accepted

### How strong will this sail pull up?

As a rough approximation, the weight of the footing ($Wc$) required to avoid the frame being lifted out of the ground is graphically depicted below.
• 7,776
1 vote

### Wind load distribution on a sawtooth steel roof

A foreword There are two issues that you need to consider : standards and norms (legislation for your specific country) what really happens with wind. When you are building you should consider both, ...
• 23.1k
1 vote

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

Normally one would use ASCE 7-10 Wind Load Calculations for leeward roofs. $$p=qGCp−qi(GCpi)$$ Depending on the location, height, prevalent winds, zone, and some other factors you end up with a ...
• 21.4k
1 vote

### How is any kind of structural reliability achieved if the probability of annual wind speed exceedance is 0.02?

If you take a read more carefully the Eurocode, it says "2% annually". That should be translated that in a full year, there is only a 2% chance to get to that wind level. So one simple way ...
• 23.1k

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