Drag computation results are strange when TAS is near zero

[RobertPastor]

Hello,
I am using Openap to build trajectories.
Concerning the Drag computations it seems that the results are strange when the TAS is very small.

drag.clean(mass=60000, tas=2.50, alt=200)
108110636.29957953

drag.nonclean(mass=60000, tas=1.50, alt=100, flap_angle=10, landing_gear=True)
289884172.22652894

Is this the correct way to use the library ?
Thanks for your help
Robert

[RobertPastor]

I recently read a condition applying to the Drag computation, in the document aerospace_07_00104_v2.pdf it is written that the Drag formulae apply only when the aircraft is airborne.
Hence, my previous raised issue might be discarded.