Short-coupled aircraft

A short-coupled aircraft or close-coupled aircraft is an aircraft design characterized by a relatively short distance between the wing and empennage (tail assembly). This configuration affects the aircraft's longitudinal stability and control characteristics. ^[1]

Design characteristics

In a short-coupled aircraft, the reduced distance between the wing and tail means the empennage must generate greater stabilizing forces to maintain aircraft balance. This often requires a larger tail surface area compared to conventional aircraft designs. The shorter moment arm can make the aircraft more sensitive to pilot-induced oscillation, potentially increasing the complexity of flight control.

Aircraft types

Aircraft designs that frequently exhibit short-coupling include:

• Tandem wing configurations
• Many flying wing aircraft
• Specific aircraft models such as the Flying Flea and Saab Viggen

Aerodynamic implications

The short-coupled design presents both challenges and potential advantages in aircraft engineering, influencing factors such as maneuverability, stability, and overall performance.

References

1. "Challenges of Flying Floatplanes: Design Considerations Like Short-Coupling". Model Aeronautics Association of Canada. Retrieved 24 January 2026.