Copyright Velocomp LLP 2005-2013
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Propulsion Power
It takes power to propel the bike/rider down the road.
Power meters
measure propulsion power.
Propulsion Power is reported in the PowerStroke Stats Box, and is the same
as the “Average Watts” number reported in the main window of Isaac.
Wobbling and Wasted Watts
Wobbling requires the cyclist to expend energy (watts) to power the
wobble—that’s Wasted Watts.
“Wasted Watts” is the amount of power required to move the rider’s center
of mass through the motion measured by the accelerometer. Wasted Watts
are consumed both in side-to-side motion, and front-to-back motion. The
“split” of Wasted Watts between front-to-back and side-to-side motion is
reported in the PowerStroke Stats Box.
Note that
Propulsion Power measurements do NOT include Wasted Watts
.
Wasted Watts are a hidden “tax” paid by the cyclist’s body, to power the
wobbling motion of each and every crank stroke.
Wasted Watts will vary throughout a bike ride; a graph of Wasted Watts vs.
distance/time can be shown in the main window of Isaac.
Average Wasted Watts for the time/distance selected are reported in the
PowerStroke Stats Box. Additionally, the “split” of Wasted Watts between
front-to-back and side-to-side motion is reported in the PowerStroke Stats
Box.
Wobbling and Wasted Time
Any energy consumed by wobbling takes away from energy that might be
used to cross the finish line sooner—that’s Wasted Time.
Wasted Time is an index, measured in seconds, that estimates the amount
time that the cyclist would save during the period selected, if the Wasted
Watts were converted into Propulsion Power.
Wasted Time for the time/distance selected is reported in the PowerStroke
Stats Box.
