Newton power reading high?

Newton power reading high?

Postby smeagolsmy » Sun May 29, 2016 12:47 pm

Hi, I was wondering if you could analyze a ride file for me and see if my Newton seems to be over reading my power, I use it on two bikes, but one bike has a powertap hub. Ive recently done two calibration tests, but get the same results. My ftp is 234w, there are two rides, the short ride is before the last calibration, the longer after the last calibration, how does it look to you? thanks, Triston.
Attachments
iBike_05_26_2016_1756_20_Miles.ibr
(225.53 KiB) Downloaded 27 times
iBike_05_28_2016_0909_38_Miles.ibr
(413.89 KiB) Downloaded 36 times
iBike_05_28_2016_1144_3_Miles_CalRide.ibr
(45.54 KiB) Downloaded 37 times
smeagolsmy
 
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Re: Newton power reading high?

Postby Velocomp » Sun May 29, 2016 9:34 pm

Your profile is perfectly calibrated for wind but somehow the rolling resistance got adjusted up, to a value comparable to riding in sand!

The corrected profile is attached. Load it and all should be well.
Attachments
Smeagol.ibp
(367 Bytes) Downloaded 35 times
John Hamann
Velocomp
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Re: Newton power reading high?

Postby smeagolsmy » Tue Jun 07, 2016 1:33 am

Many thanks, most of out roads here in Devon are being treated with Tar and Chippings, which is a pain, but not quite sand!
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