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What is the physical benifet of forwards sweeping wings? I've always wondered this.

A forward-swept wing is an aircraft wing configuration in which the quarter-chord line of the wing has a forward sweep. The configuration was first proposed in 1936 by German aircraft designers. Perceived benefits of a forward-swept wing design include

- Mounting the wings further back on the fuselage, allowing for an unobstructed cabin or bomb bay, as the root of the wingbox will be located further aft, and

- Increased maneuverability, due to airflow from wing tip to wing root preventing a stall of the wing tips and ailerons at high angle of attack. Instead, stall will rather occur in the region of the wing root on a forward-swept wing.

- This reversed spanwise airflow should reduce wingtip vortices, generating less drag and allowing a smaller wing.

Possible drawbacks of a forward-swept wing include

- When using a conventional metal construction: A reduced divergence speed or, in order to avoid this, an increased wing weight, as wing stiffness needs to be increased.

- A forward-swept wing becomes unstable when the wing root stalls before the tips, causing a pitch-up moment, exacerbating the stall. This effect is more significant with a large forward-sweep.

--O--

Wikipedia

Edited by oracle1990
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