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.