Okay, I think I was unclear. I was thinking 100 meters or longer. I made a slight edit to my comment. My point was that for starting and stopping to be a major

Okay, I think I was unclear. I was thinking 100 meters or longer. I made a slight edit to my comment. My point was that for starting and stopping to be a major contributor, getting up to speed had to be comparable in energy to drag. Turns out that getting up to speed took more energy than I expected when I did the math in a later comment: https://news.ycombinator.com/item?id=22257938 https://news.ycombinator.com/item?id=22257938