It consists of a collection of menu-driven routines which perform various useful functions such as:
- Viscous (or inviscid) analysis of an existing airfoil, allowing
- forced or free transition
- transitional separation bubbles
- limited trailing edge separation
- lift and drag predictions just beyond CLmax
- Karman-Tsien compressibility correction
- fixed or varying Reynolds and/or Mach numbers
- Airfoil design and redesign by interactive modification of surface speed distributions, in two methods:
- Full-Inverse method, based on a complex-mapping formulation
- Mixed-Inverse method, an extension of XFOIL's basic panel method
- Airfoil redesign by interactive modification of geometric parameters such as
- max thickness and camber, highpoint position
- LE radius, TE thickness
- camber line via geometry specification
- camber line via loading change specification
- flap deflection
- explicit contour geometry (via screen cursor)
- Blending of airfoils
- Writing and reading of airfoil coordinates and polar save files
- Plotting of geometry, pressure distributions, and multiple polars
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