Session Protocol

Session protocol

The testing protocol is the same for all test types.

Aero calibration

It is really important to consider the aero calibration when designing your run plan.

Aerosensor reports a calibration factor for each run to account for airflow slowing as it approaches the bike.

You need to consider the following in order to handle it correctly:

• After the first baseline run, update the aero cal in the ACS app.
• During testing, if it shifts by more than 5%, update it in the app to minimize altitude calculation errors.
  • If this happens in out-back testing, update value then repeat the run.
• Expect consistent aero calibration for the same configuration.
• Biggest changes occur with body position, stack height, bar angle, etc.

Run plan

Baseline consistency is critical in aerodynamic testing. A known, repeatable configuration ensures accurate comparisons.

• Start with two baseline repeats to check system repeatability. Initial drift is common due to power meter offset stabilization and the rider settling in.
• End with a baseline run to detect any drift over the session.
• Don’t leave more than 10 runs between baselines.

Run	Configuration	Power meter cal	Aero cal
1	Baseline	Calibrate before run	Last known, or 1.400
2	Baseline (repeat)	Calibrate	Update to calculated
3	First config change.	Calibrate	Keep as last.
4...	Subsequent changes..	Calibrate	Keep as last.
Last	Baseline (final repeat)	Calibrate	Keep as last.