Introduced in OpenVSP v3.11.0, Wing blending works by giving the user enhanced control over the leading and/or trailing edges of a wing section. Instead of a straight line, the LE/TE can become a smoothly varying curve. Through sufficient application of magic, the rest of the airfoil follows along.
Blended wing controls are available on the Blending tab of the wing geometry GUI. At the top of the tab under “Blend Airfoil”, a wing airfoil selector is available. Below, the tab is divided into two sections horizontally: Leading Edge and Trailing Edge, and two sections vertically: Inboard and Outboard. Each of the four sections lists a drop-down labeled “Match”, along with controls for sweep, dihedral, and strength. “Match” is used to constrain the planform curve to desired values, summarized below:
- FREE – Unconstrained
- ANGLES – User specified values
- XX_XX_TRAP – Theoretical trapezoidal wing
- XX_ANGLES – Specified values
Unavailable options are grayed-out or hidden. The most simple way to modify a LE/TE is to change its local sweep or dihedral angle. You can also set a LE/TE direction to ‘match’ an adjoining wing section. These options should enable the user to quickly build their design intent into a blended wing with a minimum of parameters.
A brief video tutorial on the blended wing component is available here: Blended Wing Tutorial
This page was created and edited by: — Justin Gravett 2017/09/21 10:00