OpenMDAO
Landing gear drag is always included in tabular takeoff aero equations
Description
The FLOPS-based tabular takeoff aero group includes landing gear drag in the net drag coefficient equation but does not have an option to disable it, meaning landing gear drag is added to all segments of flight if a value is provided by the user.
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A temporary solution would be to add an aerodynamics option for the user to specify if the landing gear is up or down.
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A permanent solution could be to implement a gradual decrease in drag as the landing gear is retracted using a cosine function, similar to legacy codes. This would require a variable for retraction time as well as logic on when to retract (typically a short delay after liftoff, or a short delay after clearing the 35ft obstacle).
Example
From aviary\subsystems\aerodynamics\flops_based\takeoff_aero_group.py :
Aviary Version
0.9.4-dev
Relevant environment information
No response
