Cranes

= Zach and Taylor :]=



How to build a Crane!

 * Step 1 -** Lay two Popsicle sticks vertically on a flat surface. The sticks should be parallel and far enough apart to put a thread spool between them. Place one thread spool between the Popsicle sticks, so the ends of the Popsicle sticks are even with the outside of the spool of thread. Glue them in place. This will be the top of the arm of the crane.


 * Step 2 -** Cut the front off of the cereal box. Measure the Popsicle sticks from the previous step against the edge of the box, and cut two slits along the top, front edge. The crane will be inserted into these slits in a subsequent step.


 * Step 3 -** Insert a pencil into the center of the second thread spool. The pencil should fit snugly, so the spool turns when the pencil is turned. Add glue as necessary to firmly attach the pencil to the spool. Set the spool inside the box with the pencil ends extended over the sides of the box. The spool should turn freely when the pencil is turned.


 * Step 4 -** Glue toothpicks across both Popsicle sticks in a ladder pattern. Repeat pattern on the opposite side, and glue in place. Set aside to dry completely. Once dry, insert the bottom of the sticks into the previously cut slits on the cereal box. Place the sticks at a 45-degree angle to the bottom of the box, and glue in place. Set aside to dry.


 * Step 5 -** Tie one end of the string to the thread spool attached to the pencil. Thread the string up through the arm of the crane and over the spool at the top. Tie the other end to a paper clip or button magnet to complete the crane. Turn the pencil to wind the "winch" of the crane and move the "load" at the other end.

Other Information!

 * Pulleys -** is made from a wheel and a rope, it makes lifting easier

Cranes are commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials and in the manufacturing industry for the assembling of heavy equipment.
 * Made Of -** generally equipped with a winder, wire ropes or chains and sheaves, that can be used both to lift and lower materials and to move them horizontally. It uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human.


 * Motors -** Crane motors are often exposed to extreme weather conditions – as well as being subject to high operational requirements. They have to withstand high humidity, salty air and high wind speeds while ensuring a high overload capacity and a wide speed control range.


 * Gears -** Are everywhere there is something that spins. If there is are engines and motors there will be a gear.