Oswald Efficiency Factor Calculator

The Oswald Efficiency Factor Calculator can be used to determine the efficiency of propellers or rotors in aviation by comparing the induced velocity to the tip speed ratio.

Input Parameters

Calculation Results

Calculation Formula

Oswald Efficiency Factor (OEF) = Induced Velocity / Tip Speed Ratio

Where:
Induced Velocity: The velocity induced by the rotor or propeller into the airflow.
Tip Speed Ratio: The ratio of the tip speed of the rotor or propeller to the induced velocity.

Oswald Efficiency Factor Calculator Usage Guide

Learn how to use the Oswald Efficiency Factor Calculator and its working principles

How to Use the Calculator

  1. Enter the induced velocity in meters per second (m/s).
  2. Enter the tip speed ratio (TSR).
  3. Click the "Calculate" button to compute the Oswald Efficiency Factor (OEF).
  4. The result will be displayed in the OEF field.

Understanding the Oswald Efficiency Factor

The Oswald Efficiency Factor (OEF) is a key parameter in the performance analysis of propellers and rotors. It provides a measure of how efficiently the rotor or propeller is converting rotational energy into thrust. A higher OEF indicates better efficiency.

The formula used is:

OEF = Induced Velocity / Tip Speed Ratio