Recent content by mcdenny

I just found how to use a FIT file viewer download .fit data. I had recorded a few rides on my Como last year so I had something to play with. The .fit file records all the data we care about (and more) once each second. The 45 minute ride I downloaded had 2600 lines! I’m envisioning many...

In the specialized app. The "rides" tab.

You aptly named the image "whoa.jpg". Interesting stuff.

Can you extract the exact data from the .fit file download from the Specialized app?

Curious what you expect the weight to be after adding the "equipment" from your old 5.0.

Stunning scenery. I cam't imagine what a pleasant ride that would be in the late spring.

How did you get this data? I’m envisioning myself audio recording myself reading motor and rider power of the display while I ride. It looks like you were able to capture much more granular data.

Clearly Px is a function of E and Pr. Pedal harder, get more motor power. Increase the ease setting, get more motor power. The Spech data table says nothing about how Px varies with Pr FOR A GIVEN E except we know Px is 0 when Pr is 0 and the table gives Pr and Px at saturation for 10...

The only difference between static (E+M) and dynamic (M=100). is motor power is not artificially capped in the static case so the curves are the same. I bet the slight differences are due to rounding in your calculations. You are assuming row 10 in the spec data table is an error. We just...

Uh huh, I'll go with you.

There were a couple of dozen gators along the road near the lake shore. They all moved off when I got close. Can't say I wasn't nervous though. Intellectually I was fine. If they ate tourists either the tourists or the gators wouldn't be here. My reptilian brain stem said "RUN".

My wife was going to be away for a week in early January so I took that opportunity to take my bike to Florida and ride some of the many rail trails in the state. I didn't want to drive the 1000+ miles with the bike on the hitch carrier both for reasons of security and not reducing the range of...

Do think it's possible the whole notion of "boost" is something Specialized marketing department thought up to convey a sense of how powerful the motor is in a way that would be meaningful to experienced bike riders?

It should be 400 watts at the rear wheel. The tables suggest at 100/100 85 rider watts gets you 300 motor watts so 100 rider + 300 motor = 400 total. The 450 watts at 100/100 on the graph above is a mistake. At 100/100 motor watts = rider watts * 3.53 up to a max of 300 watts. My mistake...

Because its fun to know how stuff works!