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Power way off

Posted: Sat Sep 10, 2016 4:35 pm
by blp
During today's ride power reading way off - too low. I suspected the inclination was off too. This is reflected in Isaac.

I did a Cal Ride last week and tweaked a bit, tire diameter and bike weight, and uploaded to the Newton 6.

Tried repairing the tilt of today's ride, but got a similar result.

As well as the suspicious file, I have uploaded a similar ride from a couple of weeks ago and the most recent Cal Ride as well.

Did I mess up the calibration?

Re: Power way off

Posted: Sat Sep 10, 2016 7:06 pm
by Russ
Hello blp,

See anything wrong with this?
CdA: 0.344 m^2; Crr: -0.0195

This is the CdA, Crr from your "suspect file". As far as I know there is no such thing as a negative Crr (yet) but future tech? :D

I arbitrarily set your Crr to .004 and things looked more normal, go to your old profile and see what your Crr was and place that value into the profile, check your Cda while there I guess would be good, or just look at your old good ride file for those.

Hope this helps,
Russ

Re: Power way off

Posted: Sat Sep 10, 2016 11:27 pm
by blp
My magnetic levitation tires.

Re: Power way off

Posted: Sat Sep 10, 2016 11:42 pm
by blp
How do I place the correct Crr (.00441) into the profile?

Re: Power way off

Posted: Sat Sep 10, 2016 11:44 pm
by blp
I think I found how...

Device > Send profile to Newton > the tweaked Crr file.

Thanks