As a first example, consider a simple swept tapered wing.
The input to getmac consists of wing chords and each is defined by the length of the chord and the x- and y-coordinates of the leading edge. All chords are parallel to the x-axis. In this case, there are three chords. The root chord is of length 400. The tip chords are of length 200 with the leading edge is at (600,1000) and (600,-1000).
The program input is as follows:
&chord y=-1000, xle=600, c=200/ &chord y=0, xle=0, c=400/ &chord y=1000, xle=600, c=200/