Creating control surfaces

The APM Preprocessor has the ability to create control surfaces by deforming the mesh. To create a control surface add the following lines to the end of the .conf file.
x1 = 0.0000
y1 = 0.0000
z1 = 0.0000
x2 = 0.0000
y2 = 0.0000
z2 = 0.0000
x3 = 0.0000
y3 = 0.0000
z3 = 0.0000
deflection = 0.0000
differential_deflection = 0
mirror = 1
The three vectors with components x1, y1, z1,x2,y2,z2,x3,y3,z3 define the mid-plane of the control surface. The hinge line is defined as x2-x1, y2-y1, z2-z1. The image below shows the three vectors and the resulting control surface mid-plane.
Definition of a control surface
Control surfaces should always be created on the left side of the
symmetry plane (negative
-direction). The APM Preprocessor will automatically mirror the control surfaces across the
symmetry plane.
Deflection specifies the amount of control surface deflection in degrees and differential specifies whether mirrored control surfaces deflect in the opposite direction.