Your Questions About Wind Generators For Sale

Michael asks…

how to make a mini wind tunnel?

Our group is making a mini wind tunnel for the college exhibition (STD XI). we want to study the pattern of air movement around various types of vehicles and aircraft(toys) by leaving a trail of gas or smoke.there are many other ways of doing so like sticking fine strips of paper at different points on the vehicle, but we want to use the old method by using smoke as it will give a clear picture of air movement. please give some ideas especially on how to make the smoke generator for the same.

admin answers:

Smoke is a problem because most smoke will also contain carbon monoxide, and that’s not the kind of stuff you want your “exhibit” producing at a science fair.

I have absolutely no idea if it would work…but…Halloween is over and many retailers will prbably be having clearance sales on their Halloween items. I know that those “fog machines” produce their own cloudy “stuff”. I’d suggest you look into a buying a discounted fog machine, now that the sales are on.

You can also make your own fog machine if you want.

Steven asks…

Best Solar Power Home related magazines?

We’re planning to incorporate Solar design features into our next home – actually, we’re looking at wind & solar. Which magazines are worth subscribing to? Which are not?
I should specificy that we’re more interested in passive solar than in solar panels.

admin answers:

Actually, check out some of the links on http://www.builditsolar.com

If you are going to do much of the work yourself, you will be sadly disappointed by what is available in print:

Homepower magazine http://www.homepower.com for example, it most often reads like a sales brochure, because “hands on” to a number of people usually means buying most of the system ready made in a kit. Hands on for me is breaking out the soldering iron and doing point to point wiring on components to construct the regulators (often called charge controlelrs.) Too much chaff for a hands on person to find useful. Some of the ads are useful.

Nuts and Volts http://www.nutsvolts.com/ is a bit better, but their topical coverage is far ranging so you do not always get as much as you would like. Spendy, might be better to sheck it out at the bookstores and buy it off the newstand when a decent article appears.

Mother Earth news http://www.motherearthnews.com is pretty good, but the best bang for the buck there is to buy their archives on CD rom, which is 3 disks, broke down by decade. There is a fair amount of substance, sometimes you encounter an article that sought to convert one item over to another, only it would have been much less work and cost for them to have started out from ground level and construct (with used parts) the same thing, which they sought to construct in the first place, a solar charged electric tractor is one specific item I have come to mind as one the author of the article could have done better. You might find the book they published “The Mother Earth News Handbook of Homemade Power,” which is not real good for specifics in some areas, but is good for some ideas if you are good at working from thumbnail sketches, you can fill in the blanks where there are gaps in detail. The book was written more as a “primer” than a complete compillation.

For your wind systems, there is a lot to be found at http://www.lindsaybks.com Hugh Piggott has written a few good books on the home construction of windmills. The LeJay Manual is a good reprint that has a lot of good info for home constructing- down to the wooden propeller profiles. As well as the book “Generator Secrets.”

One of the good sources for materials and tools supplies and systems is Northern Tool http://www.northerntool.com

One thing on propeller materials- never us ABS and never use PVC. As tempting as those can be they break. When they break, the blades will go for a great distance in modest winds. They can kill too.

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