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Check out SonicDad.com to see more great projects! http://www.sonicdad.com/
SonicDad’s Bottle Rocket Project: http://youtu.be/BR6n31OphuY
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Some of you that have followed me for a while might recognize this project as an upgraded version of my water bottle rocket launcher, seen in this video: http://youtu.be/YRtFY_O0HcU
While the old design was the cause of quite a few singed arm hairs, this new model is much more pleasant to use due to the new blast shield as well as the distance from the rockets that has been achieved by having the igniter on a longer leash. Even so, safety glasses are a required precaution, just in case.
I recently participated in leading some science based activities for grade school aged kids and these bottle launchers were a big hit. The kids had a lot of fun attaching craft foam fins onto the bottles with duct tape and hot glue. The launchers themselves only take about 20 minutes to put together, so it’s a quick and easy project that offers a ton of entertainment.
The rockets are fueled by the combustion of rubbing alcohol, which is ignited by the spark from a barbecue igniter. I used rubbing alcohol with a concentration of about 90% in the video, but any concentration of 70% or greater should work just as well. When fueling the bottles, the most important step as shown in the video is to whip the last drops of liquid alcohol out the open end. This brings the fuel/air mixture to the proper level for a good combustion, and reduces the liquid alcohol particles expelled from the rocket upon launch that otherwise could melt the plastic blast shield or cause minor burns.
A neat trick I did not mention in the video is that once the bottles have been fueled, rather than pushing them onto the launcher the cap can be put back on the bottle to have it ready to fire later.
Parts for this project:
(x2) 1.5′ x 3/4″ PVC Pipe
(x2) 10″ x 3/4″ PVC Pipe
3′ x 1/2″ PVC Pipe
3/4″ x 3/4″ x 1/2″ PVC Tee
(x2) 3/4″ PVC Elbow
Push Button Barbecue Igniter
Extra Wire (about the same diameter as the wires on the igniter)
Solder & Heat Shrink Tubing or Electrical Tape
2 Liter Soda Bottle
Safety Glasses & Hearing Protection! #NightHawkInLight
Check out my latest video: “How To View Invisible Air Currents With Lasers”
Learn how to make a flaky homemade pie crust in seven easy steps.
The tastiest pies are made from the crust up. In this video, you’ll learn how to make homemade pie crusts in seven easy-to-follow steps. All you need are flour, water, salt, and fat (butter, shortening, or lard). You’ll learn the proper order for mixing together ingredients and how to cut in the fat, and see why a combination of fats sometimes makes the best pies (with some fats adding flakiness to the crust and others rich flavor). You’ll see tricks for easily mixing the fat into the dry ingredients and see what the mixture should look like when prepared just right, so you’ll end up with a wonderfully flakey pie crust. You’ll learn when to add the water and how much to add at a time. You’ll learn how to test the pie dough for moisture and how to avoid adding too much water or overworking the dough, which will give you a tough pie crust. You’ll also learn why the dough should rest in the refrigerator for an hour and how best to store it. Then you’ll see a great technique for rolling out pie dough on a floured counter and learn how to judge whether the crust has been rolled out large enough to fit the pie pan. You’ll also see how to gently fold the pie crust and lay it out in the pie pan and get great tips for trimming and crimping the edges and for fixing any cracks or tears in the pie pastry. You’ll also see how to prevent the dough from shrinking during baking. Learning these easy techniques will help you bake the best homemade pies—from apple and cherry pies to pumpkin and pecan pies—even chicken pot pies!
Find the best pie crust recipes @