Tornado Tube

prusaprinters

<p>This is a simple connector to join two 2-liter bottles together to make a Tornado Tube experiment for your kids.</p> <p>Fill one of the 2-liter bottles with water, connect, swirl, watch the tornado!</p> <h3>Instructions</h3> <p>Steve Spangler Science sells these on his website:</p> <p><a href="http://www.stevespanglerscience.com/product/1226">http://www.stevespanglerscience.com/product/1226</a></p> <p>After making one for my sons instead, I decided that others needed this as well. :)</p> <p>You can see it in action here:</p> <p> <figure class="media"> <oembed url="http://www.youtube.com/watch?v=dv6vQU94wws&amp;feature=player_embedded"></oembed> </figure> </p> <p>It is the simple colored connector that you see Steve screw onto the 2-liter bottles.</p> <hr/> <p>Required items:</p> <ul> <li>Two 2-liter bottles</li> <li>Two 7/8" garden hose o-rings (hardware store)</li> <li>One print of this Thing</li> </ul> <p>While the o-rings aren't "required," I like to use them as it makes for a more water-tight seal.</p> <p>Instructions:</p> <ul> <li>Print using 2-3 shells for water tightness.</li> <li>Cut support material out of the center hole of the printed part.</li> <li>Insert a 7/8" garden hose o-ring on both threaded sides.</li> <li>Fill one of the two 2-liters 3/4 full of water.</li> <li>Screw this Thing onto the full 2-liter and screw a second 2-liter to the other end.</li> <li>Invert and swirl.</li> <li>Watch the tornado!</li> </ul> <p>Model notes:</p> <p>If you use the SCAD file to make alterations to this model, it also requires the "2LscrewPositive.11.stl" file from the "2 Liter bottle threads" thing found at <a href="https://www.thingiverse.com/thing:10489">http://www.thingiverse.com/thing:10489</a>.</p> <p>Enjoy!</p> <p>Postscript:</p> <p>After publishing this, I found parkolay's "20_Oz_Bottle Adapter" <a href="https://www.thingiverse.com/thing:6090">http://www.thingiverse.com/thing:6090</a> that performs the same function. While they are very similar, mine will allow others to edit it via OpenSCAD. Also mine has a reducer in the center to make the tornado last longer while parkolay's does not.</p> Category: Physics & Astronomy