This tutorial covers the propeller Sweep and Axial parameters. In contrast to Skew and Rake, the Sweep and Axial are always relative to the propeller plane of rotation rather than the local chord orientation. Sweep is an angular rotation of the blade section (positive against the direction of rotation) in the plane and Axial is a translation of the blade section normal to the plane (positive against the thrust direction). Note that Axial differs from Pre-cone in that the section is translated rather than rotated and may be applied along the blade rather than to the entire blade at once. For more information about how to manipulate these curves, please refer to the Propeller Blade Control Curve Interface page.
This tutorial covers the propeller Rake and Skew parameters. In contrast to Sweep and Axial, the Rake and Skew are always relative to the local chord orientation rather than the propeller plane of rotation where Rake is normal to the chord and Skew is parallel to the chord. For more information about how to manipulate these curves, please refer to the Propeller Blade Control Curve Interface page.
The propeller blade Twist curve is defined by the distribution of twist angles in degrees along the blade and the curve type. For more information about how to manipulate these curves, please refer to the Propeller Blade Control Curve Interface page.
The propeller blade Chord curve is defined by the distribution of chord-to-radius (C/R) values and the curve type. For more information about how to manipulate these curves, please refer to the Propeller Blade Control Curve Interface page.
This tutorial introduces the propeller blade control curve interface including how to change the curve type, add or remove control points, interact with the curves, and changing values manually. Note that a propeller with many control points will tend to update slowly so you should only use as many control points as needed to obtain the desired profile. An imported BEM model will likely have too many points to function effectively. However, you can choose an Approximate Cubic Bezier to significantly reduce the number of points and automatically convert to a Bezier curve.
