Function File: pol = combinepolars (pol1, pol2, coef)

Function File: pol = combinepolars (pol1, pol2, c1, c2, c)

Combines two polars to get a specific interpolation. Useful when you repeatedly change the chord length at a particular section, and you don't want to recalculate each time using different local Reynolds number. A good streategy here is evaluate the boundary values or a few more and then interpolate. You can either directly specify an interpolation coefficient (pol1 is 1, pol2 is 0), or a pair of chord lengths and a requested chord length.