How to Make a Bottle Boat
You have a lot of flexibility when it comes to using materials to make you boat. It is pretty much a little recycled boat. And you can use two liter plastic bottles which work the best but you can use any size plastic bottle that you want. Below is a picture of the same boat that I added a remote controlled rudder to so it could be steerable.
So let's get started. This picture shows the materials needed to make the basic bottle boat.
The basic assembly is pretty easy.
Now let's build the sail.
This picture shows the layout of the three rods for the sail assembly. Tie and glue the two horizontal ones as shown. The first is four inches from the bottom and the second is twelve inches from the bottom.
When building the sail it is very important that you make it very strong so securely tie the pieces together and then put a liberal amount of glue on them. You don't want these to slip sideways - or the boat will not work. Instead of propelling the boat forward the sails will simply turn!
In the picture here you can see I tied it with wire and then applied hot glue to secure it. I also drilled 1//8 inch holes and ran the wire through that. No way my sail is slipping!
To add the sail (I recommend you actually do this before you glue the whole thing to the boat). You can just slip the whole bag right over the sail structure and poke a little hole so the mast sticks through it. Then secure it tightly with string and tape at all four cornes and along both masts. If you want a better looking sail you can also lay your bag flat down on a table then use masking tape to make an eight inch square and cut it out.
This picture shows the sail in place so you can get an idea of what the finished sail should look like.
Now let's talk about the guide wires
If your boat mast and sail are built very strongly you probably don't need these guide wires but I recommend you do them any way.
I simply drilled holes in the four corners of the boat and in the ends of all the masts. then I ran the wires. You can alternately use string.
Now paint it up and you are done! And you can add some fun little details like gluing figures to the surface of the boat or making yourself a little flag for the top.
And Here it is out for a Sail
Gonzo Gizmos: Projects & Devices to Channel Your Inner Geek - It's possible to use optics to roast a hot dog without electricity or a stove; to make a simple radio with just an iron, a few basic circuits and three shiny pennies; and to assemble a simple steam-powered boat with a plastic bottle, a candle, copper tubing and a nail. Of course, only die-hard science nerds would attempt these projects.
Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices Want to get a little more creative? This book is off the hook!
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