What creates more friction? Gears and chain or belt and pully?

wind generator blades

What creates more friction? Gears and chain or belt and pully?
I am making a home made wind generator for a school project. I am using a car alternator( yes i know its not 100% power efficient. but im keeping cost down). I need to know how to make a good blade to generator ratio and keep the friction down. I have heard rumors or people using old 10 speed gears and chain. or should i use belts and pulleys? what would create the least friction? Yes i plan to use sealed bearings also.

Best answer:

Answer by kasab
For your purpose you should talk about rolling resistance rather than friction. A belt and pulley system is heavily dependent on the presence of friction. That system would suit your work, as it offers a lower rolling resistance.

Know better? Leave your own answer in the comments!

One Response to What creates more friction? Gears and chain or belt and pully?

  1. Tim C

    The rolling resistance of a belt and pulley system generally causes a 5% loss as bending and straightening the belt causes the rubber to heat. The chain is probably a little more efficient.

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>