I be damned... will this work? Why do we use a chain instead of a couple gears?

Found on http://goawaygarage.blogspot.com/

Concrete canvas insta presto garage or instant shelter!

innovative way to load logs... not safe, but hands free. Some evolution on this on it could be quite the invention

found on http://twentytwowords.com/2013/12/12/ingeniously-simple-contraption-lifts-logs-onto-a-truck-with-the-torque-of-the-trucks-wheels/