Science Buddies: "Ask an Expert"

I need to make a device containing a motion transmission and a motion transformation system. There must be a speed change and the decice has to have a use. Any ideas?

aliki2727 - Your request is very vague. I think we need more understanding as to what you think you want to construct and assist with any problems you might encounter. If I take your statement question literally, the one thing that answers most of your questions is 'two meshing gears'. They transmit motion, transform it if you will, can change speed and have many uses.

Rick Marz