Power way off

Power way off

Postby blp » Sat Sep 10, 2016 4:35 pm

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?
Attachments
iBike_09_10_2016_0945_66_km_HiDef.ibr
Today's suspect file
(1.48 MiB) Downloaded 20 times
iBike_09_04_2016_1129_53_km_HiDef.ibr
Similar
(1.64 MiB) Downloaded 16 times
iBike_09_04_2016_1120_3_km_CalRide.ibr
Cal Ride
(104.54 KiB) Downloaded 17 times
blp
 
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Location: Vancouver, BC, Canada

Re: Power way off

Postby Russ » Sat Sep 10, 2016 7:06 pm

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
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Russ
 
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Re: Power way off

Postby blp » Sat Sep 10, 2016 11:27 pm

My magnetic levitation tires.
blp
 
Posts: 115
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Location: Vancouver, BC, Canada

Re: Power way off

Postby blp » Sat Sep 10, 2016 11:42 pm

How do I place the correct Crr (.00441) into the profile?
blp
 
Posts: 115
Joined: Mon Mar 26, 2012 12:06 am
Location: Vancouver, BC, Canada

Re: Power way off

Postby blp » Sat Sep 10, 2016 11:44 pm

I think I found how...

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

Thanks
blp
 
Posts: 115
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Location: Vancouver, BC, Canada


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