Welcome to Air Turbine Propeller Company

Table of basic fan law formulas.

Basic Fan Laws

Pressure equivalents table.

Pressure Equivalents

Fan tip speed chart.

Fan Tip Speed Chart

Altitude and temperature correction factors.

Altitude & Temperature Correction Factors

Velocity pressures.

Velocity Pressures

Useful fan formulas.

Fan Formulas

For help with any other axial fan technical questions, please contact us for assistance.