Hello people it is me ethant36 and today i am going to write about my innovation day project. We were asked to make a castle with a working drawbridge. To do that you need to use a pulley. For the challenge you had to use gears. A pulley is a simple machine that is for lifting things. Pulleys help you lift things because when you are using them you don’t need to use brute force and you can use some weight. Here is a picture of a pulley
Compound pulleys are pulleys with more than one pulley.
Compound pulleys help be cause if the load is 100 pounds and you have two pulleys, you only need to use 50 pounds of force.
If you have three pulleys you divide the load’s weight by three and that is how much force you need to use.
Here are pictures of compound pulleys
Gears are technically not simple machines but they are pretty simple.
Gears are for having one gear move another one and they can move each other.
When one gear is being turned, that gear is called the driver gear. The gear that is being turned by the driver gear is called the follower gear.
Note how when one gear is going clockwise, the other gear is going counterclockwise.
The Idler is when there are more than two gears and the idler is the one in the middle (if there are three gears).
The idler makes it that if the driver gear is going counterclockwise the follower gear also goes counterclockwise.
Here is an example
Ignore how gear B is in gear C.
Notice how gear A is going clockwise, gear B/C (the idler) is going counter clockwise and the follower gear, gear D is going clockwise.
What the idler does is if the driver gear is going clockwise then the follower will too.
Since we are building a castle, we need to know about castles and what they look like and we also needed to know about the feudal system and the medieval part of things so here is my google slides about it.
Here is my hypothesis (How me and my partner thought we were going to build the castle)
Here is our procedure video
Here are two pictures of my rubrics
My self reflection questions were What did you like/ dislike and why and what I would do differently next time. I liked the project because there was lots of building and I like building. For what I would do next time I would try to do a little more things in the inside. I liked our pulleys and gears but the inside was kind of bare.