Introduction
There are multiple equations available in the Parasite Drag tool to compute laminar or turbulent skin friction along with component form factors. Body- and Wing-type components will each have their own respective sets of form factor equations available and may also be set to a manual value. Using the scroll bar or expanding the Parasite Drag window width will show the entries for percent laminar flow (accepting values from 0 to 100) and interference factor (Q).
Each of the equation options are documented on the Parasite Drag tool wiki page.