Copyright Velocomp LLP 2008-2010
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All three sets of data are VERY close (within 1%) of each other;
that’s what we would
expect
.
INTERESTING SIDE NOTE
: why is there
ANY
difference between the iAero power
measurements and the wireless DFPM?
The iAero uses fixed, baseline drag coefficients to measure power. As you’ve learned,
when a cyclist moves from the baseline position that affects Time Advantage and power.
The iAero assumes the rider’s position is fixed, but the wireless DFPM does not make this
assumption. So, the iAero assumption that the rider doesn’t move results in a 1.2W
difference on overall ride stats.
Now, for this ride that’s only a 0.5% difference,
so
on an overall basis the iAero assumption is excellent
.
However, the moment-to-
moment differences in power readings between the iAero and CinQo make it possible for
the iAero to measure Continuous CdA and Time Advantage, too!
