| 摘要 |
A fluid dynamic section (11) provides one or more fixed size escapelets (17, 19) through a foil body to reduce the induced and interference drag caused by trailing vortices and similar wake turbulence The escapelets transfer energy from an inlet (51) located in the high-pressure surface (25) of the foil or foil body to an outlet (53) located in the lower-pressure surface (27), allowing energy that would normally form a vortex at the tip of the foil to be redirected and dissipated in a beneficial way As a result, drag is reduced and fuel economy is increased, while at the same time increasing the authority of ailerons and similar flight control surfaces, allowing aircraft that were not previously spin recovery rated to become spin recoverable |
