Geometry

This module includes tools for computing useful geometry quantities.

Wing geometry

WingMACTrapezoidal

This component computes the mean aerodynamic chord of a trapezoidal wing planform (defined by area, aspect ratio, and taper).

WingSpan

This component computes the span of an arbitrary wing as \(\sqrt{S_{ref} AR}\), where \(S_{ref}\) is the wing planform area and \(AR\) is the wing aspect ratio.

WingAspectRatio

This component computes the aspect ratio of an arbitrary wing as \(b^2 / S_{ref}\) where \(b\) is the wing span and \(S_{ref}\) is the wing planform area.

WingSweepFromSections

This component computes the average quarter chord sweep angle of a wing defined in linearly-varying piecewise sections in the spanwise direction. The average sweep angle is weighted by section areas.

WingAreaFromSections

This component computes the planform area of a wing defined in linearly-varying piecewise sections in the spanwise direction.

Warning

If you are using this component in conjunction with SectionPlanformMesh and the inputs you are passing to this component are the same as those passed to SectionPlanformMesh, ensure that you have set the scale_area option in SectionPlanformMesh to False. Otherwise, the resulting wing area will be off by a factor.

WingMACFromSections

This component computes the mean aerodynamic chord of a wing defined in linearly-varying piecewise sections in the spanwise direction. It returns both the mean aerodynamic chord and the longitudinal position of the mean aerodynamic chord’s quarter chord.

Other quantities

CylinderSurfaceArea

Computes the surface area of a cylinder, which can be used to estimate, for example, the wetted area of a fuselage or engine nacelle.