generally the aerodynamics comes into play a lot in terms of the frame you choose especially under windy conditions. Also depends how well your copter (I assume) is tuned. I have a tricopter that performs well in ~25mph but thats because its wide and low profile. usually more motors = more stability in all conditions.
A lot of this is highly dependent on the amount of turbulence of the wind. I've seen multicopters fly in 60 mph wind, if it's an off-shore breeze that is very "smooth. And then 20 mpg wind can be devastating if you're flying near any obstacles like trees or buildings.
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generally the aerodynamics comes into play a lot in terms of the frame you choose especially under windy conditions. Also depends how well your copter (I assume) is tuned. I have a tricopter that performs well in ~25mph but thats because its wide and low profile. usually more motors = more stability in all conditions.
A lot of this is highly dependent on the amount of turbulence of the wind. I've seen multicopters fly in 60 mph wind, if it's an off-shore breeze that is very "smooth. And then 20 mpg wind can be devastating if you're flying near any obstacles like trees or buildings.
Highly unlikely you will get any decent stable flight time.
Unless you go massive, in which case you will introduce other issues.