1. What is Sidewash Angle?

Sidewash Angle is caused by the flow field distortion due to the wings and fuselage. It is analogous to the downwash angle for the horizontal tailplane.

2. How Does the Calculator Work?

The calculator uses the Sidewash Angle formula:

Where:

• \( \sigma \) — Sidewash Angle (rad)
• \( \alpha_v \) — Vertical Tail Angle of Attack (rad)
• \( \beta \) — Sideslip Angle (rad)

Explanation: The sidewash angle represents the difference between the vertical tail's angle of attack and the aircraft's sideslip angle, accounting for flow field distortions caused by wings and fuselage.

3. Importance of Sidewash Angle Calculation

Details: Accurate sidewash angle calculation is crucial for understanding the aerodynamic behavior of aircraft, particularly in analyzing the effectiveness of the vertical tail and predicting aircraft stability and control characteristics.

4. Using the Calculator

Tips: Enter the vertical tail angle of attack and sideslip angle in radians. Both values must be valid numerical inputs.

5. Frequently Asked Questions (FAQ)

Q1: What causes sidewash angle?
A: Sidewash angle is caused by flow field distortion due to the wings and fuselage, similar to how downwash affects the horizontal tailplane.

Q2: How does sidewash affect aircraft stability?
A: Sidewash affects the effectiveness of the vertical tail, which plays a crucial role in directional stability and control of the aircraft.

Q3: What are typical values for sidewash angle?
A: Sidewash angle values vary depending on aircraft configuration and flight conditions, but typically range from a few degrees in magnitude.

Q4: How is sidewash angle measured experimentally?
A: Sidewash angle can be measured using flow visualization techniques, pressure measurements, or wind tunnel testing with appropriate instrumentation.

Q5: Does sidewash angle change with flight conditions?
A: Yes, sidewash angle varies with angle of attack, sideslip angle, and other flight parameters due to changes in flow field around the aircraft.