PowerPod and coast downs

[GooseRider]

Just reading through the ISAC documentation. The multiple coast downs only apply to Newton and not PowerPod, right?

I am running a Cannondale Synapse with 700x28C Yksion tires with latex tubes at 90psi. So I assume my CdA is higher due to the endurance geometry (half the spacers moved above but still more upright seating position than that of ex. an EVO Six racing bike) and my rolling resistance is lower due to the Latex tubes (have chosen utility clincher).

Morten

[Velocomp]

Just reading through the ISAC documentation. The multiple coast downs only apply to Newton and not PowerPod, right?

Morten

Correct.

[GooseRider]

Any recommendation for CdA for a Synapse and what setting for rolling resistance to use with reasonable road tires with latex tubes?

Morten

[Velocomp]

Honestly, I would use the "Device Setup" feature of Isaac, and follow its standard settings.

Do a "Best Accuracy" calibration to dial in your device.

[theller]

So, does the PowerPod really use the one out and back calibration ride to determine correct CdA and Crr values, even for unusal (non race) bike geometries and seating positions? No coast downs needed?

Thomas

[Velocomp]

So, does the PowerPod really use the one out and back calibration ride to determine correct CdA and Crr values, even for unusal (non race) bike geometries and seating positions? No coast downs needed?

Thomas

Calibrations are for the wind sensor and accelerometer. They do not adjust CdA or Crr values.

[theller]

Does this mean that there is no way for the PowerPod to *measure* the Crr and CdA values?
IMO depending on the bike type it is not sufficient to use the initial setup which only guesses depending on rider position and tire size/pressure.

[Velocomp]

Guess is a loaded term.

Many years ago, we developed algorithms to determine CDA based on rider parameters. those algorithms are good enough to provide excellent power pod performance. Ride position is only one of the factors used to determine CDA.