Slightly off topic, but still best place to put it, because that's just cool. This guy has pretty impressive dedication and organization to keep track of every parking spot at a grocer that he's used over 6 years.
It's the comments that have me laughing though. Got some time? Appreciate people who feel the need to log every little thing? (I get this)
Posting this even though I'm 98% sure we did this same/similar experiment back in high school physics, only utilizing one wing verses two, on a fairly small scale out in the school parking lot. I recall the town had an officer (Officer Bob! LOL) there to clock the speed for us.
His explanation of the physics behind it seems off. Not sure if he's dumbing it down for the viewers, but he was on track to explaining it and then suddenly switches gears to say "it's a fan". In reality it's more akin to a helicopter blade pulling it than a fan pushing. The difference is not important unless working on the math which I really hoped he had gone into. Maybe physics girl will tackle it, doesn't seem all that hard.