You can make an airfoil using a piece of notebook paper and a book. Place the paper between two pages of the book, leaving one end of paper hanging out. Close the book. When you direct air over the top of the paper, it rises upward, illustrating lift.
Move air over your airfoil by blowing on it or by moving the book quickly through the air. Either way, you see the paper rise. This is due to the shape of the airfoil. This airfoil is simple, but it uses the same principles employed in making airplane wings and propellers.
When air is in motion, some passes over the top of the airfoil, and some passes under the bottom. Because of its shape, as air passes above and below an airfoil, the air at the top speeds up, which decreases the air pressure in that area. The air below maintains a constant speed, and so has a higher pressure. This pressure differential illustrates Bernoulli's principle. As air moves more quickly, there is a greater difference in air pressure. When the differential is high enough, lift is achieved, and the piece of notebook paper ? or the wing of an airplane ? rises into the air.Learn More
To make a mousetrap car move, string must be attached from the lever arm to the axle and wound around it. Then when the mousetrap car is released, the string is pulled from the drive axle, causing it to move forward. You need a mousetrap car base, a mousetrap, string, a long lever arm and an axle hook.Full Answer >
Colonial toys are simple trinkets made from items found around the house. These toys include marbles, wooden tops, hoops and dolls made out of corn husks. Making a corn husk doll is an easy process that only requires you to prepare corn husks, roll and tie them into the proper shapes, and add clothes from cloth and felt.Full Answer >
To make a toy car, poke two holes in both sides of an empty soda can. Run two thin dowels through the holes to form the axles. Glue four identical milk bottle caps onto the ends of the dowels to make wheels.Full Answer >
To make a mousetrap car, add eyehooks and dowels for the axles and metal washers for the wheels. To safely set the trap, wind string around the back axle and the lever.Full Answer >