Sally from the Alley II

August 19, 2014

One of our main attractions to our Storm Chasing Presentations is our 2nd generation tornado simulator named "Sally from the Alley II". Here are some stats that you might not know about Sally. 

Sally was constructed using six high-speed CPU fans driven by a 12volt Dell Power Supply. The outer tubes that create the outer air curtain consists of 32mm diameter PVC. Alot of experimentation went into the fan in the top unit where we experimented with bathroom ceiling fans which were inadequate. We ended up settling for a thermatic fan that cools the radiator out of an 1976 TA22 Toyota Celica. 

There are 10 inbuilted ulta-bright LED lights (six in the top and four in the bottom) assisted by a center LED touch sensitive with 32 LED's. The vapour unit consists of a tub with three ultrasonic humidifers. There are two seperate circuits (12v and 24v). 

After the first round of National Science Week Presentations, we have worked on fixed the center hub inset for leaks. Tonight we have conducted a few tests and applied the stickers that have arrived for Sally. It looks like Sally will be able to produce a tornado for around about an hour-and-a-half to two hours. 

We are debating whether to run the tornado simulator thoughout the entire presentation this coming weekend. It really depends on the amount of noise it emits. We'll see how it goes. Don't forget to come along this Saturday the 23rd of August, 2014 to Sunnybank Hills Library and/or Indooroopilly Library on Sunday the 24th of August, 2014 for the National Science Week/South Brisbane Storms finale presentation. 

 

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