The Engineering Spy Puffs L-O-V-E-D the water. They are living it up with all of their new toys. Who knew the spy business would be much fun? Again they are in need of some technical help and you are just the engineers they are looking for. The Puffs are on a secret mission to stop the renegade puffs from stealing all the school supplies and storing them in their secret hideout. The secret hideout has a floor with trap doors and other traps to catch intruders. The Puffs need to get across the kitchen floor without touching it. They think a hovercraft will be the best piece of equipment. A hovercraft uses a layer of air underneath it to allow it to float and move around on smooth surfaces (perfect for the secret hideout floor). The air causes the hovercraft to move on an almost frictionless surface. Friction is an important thing for engineers to think about. Friction is a push, pull, or a force which works against the motion of objects that are in contact as they move past each other. Friction is what makes it hard to drag something across the floor. Think of the hovercraft like the puck on an air hockey table. The air lifts up the puck so it won’t be touching the table causing friction. In the hovercraft’s case though the air is coming from above not below. This Howtoon does a great job of describing it!
Goal – build a hovercraft that can be pushed across a smooth surface.
Bonus if it works with your puff on it (or maybe two puffs to even out the weight)!
No building requirements this time, but please check out the instructional videos to get ideas.
Your mission is to build a hovercraft. There are really only two methods I’ve found out there and the links are below, but feel free to do it anyway you want.
1.Foamcore and Balloon hovercraft or Boyslife hovercraft – these would have worked as good boats too.
2. Balloon and CD hovercraft – simplest design
Wallace and Groomit
Kids Projects – This one gives you a simple way to stop the balloon from dragging on the floor which causes friction.
Some more information about friction – Article Source: http://EzineArticles.com/3203642