Shaping Moment Curves

NOTE

The image below contains overlay labels and highlights for clarification and learning purposes in this manual. Airfoil Maker does not contain such labels and colors on its GUI. You can hover over the widgets in the image below for tooltips on the various widget functions.

Moment Curves are the simplest curve to shape as the moments are mostly constant within the linear range of Alpha values, resulting in a flat curve in that range, and the curve only begins to change significantly as the airfoil alpha moves into the stall region. You can hover over the widgets below to get more information on how each parameter shapes the drag curve. Note that a negative moment coefficient means nose down tendency, which is typical of lifting airfoils at nearly all operating Alpha angles. Some foils; however, may exhibit positive (nose up) moment coefficients at only extreme negative Alpha values. You can hover the mouse over the widgets below for tooltips regarding each moment curve parameter.

new_lo_re new_hi_re re_active_tab min-alpha max-alpha cm-20-min cm-alpha-min cm-alpha-max cm-20-max