Energy is mv^2 so definitely square of velocity Drag from wind may be v^3 but I didn’t learn about that.
On my longer rando rides I target 15 mph on flats when I’m by myself. Not too hard, but not too easy. Wind is the wildcard. Same effort can net me 25 mph or 6 mph (granny gear on flat ground, ouch!). Toshi On Fri, May 16, 2025 at 9:11 AM Ted Durant <[email protected]> wrote: > > On May 16, 2025, at 9:56 AM, 'John Hawrylak' via RBW Owners Bunch < > [email protected]> wrote: > > The 'cube of the velocity' is due to the 'slow velocity' of a bike rider > and a linear decreasing relationship between the Drag Coefficient and > Reynolds number (which is proportional to velocity) > > > I’m anticipating some negative comments about going into the weeds on > this. I, for one, very much appreciate it! > > Interestingly, I tried to fit v^3 in my model of Strava watts, and v^2 was > a significantly better fit. Whether the Strava estimate is good is a > different question. It doesn’t account for wind speed or air temperature, > so we know it’s missing a couple of marginal effects. > > Super interesting to me that people are converging, analytically and > anecdotally, on 16mph (25kph) as something of a magic wall. > > Ted Durant > Milwaukee, WI USA > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/rbw-owners-bunch/FFBE036C-2565-49F7-A0BC-EB728051B776%40gmail.com > <https://groups.google.com/d/msgid/rbw-owners-bunch/FFBE036C-2565-49F7-A0BC-EB728051B776%40gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/rbw-owners-bunch/CAGB59xyPjLSxj%3D_pE-O7aRNmbU7Z-7-5LXzcrvpFXMtBuJ1uYA%40mail.gmail.com.
