How much air moisture is to much

[Neon Euc]

Today was really bad, it looked foggy as there was a lot of moisture in the air, checked on line and it was 90%. So I stayed inside and not fly. Tomorrow will be 80% and last time it was like that it looked ok to fly, but I didn't anyway.

So that got me thinking.... What % in air moisture can I fly safely? I know the lower the better but say it's 10% moisture in the air, I take it that's ok to fly? What's the max % I should look for before I say "nah.... To much" ?

Cheers in advanced guys [emoji4]

 

[sar104]

What really matters is whether there is condensation occurring. The higher the relative humidity the greater the chance of that occurring, since the dew point is closer to the air temperature. There is no magic number that tells you it is okay to fly but, as a general rule, if water vapor is condensing in the air as mist or fog then you may end up with moisture on/in the aircraft.

 

[Dwilliams35]

If I shut it down for 80% plus, I’m not sure the th8ng would ever leave the ground here...

 

[MTO]

I fly in foggy weather a lot, never had a problem.

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[Technical Bob]

I just avoid rain tbh
Once the bird is warmed up, it is physically warm too touch, so I just let that heat dry things out,
Im more concerned with high winds than fog.

 

[Erised]

I agree with sar104, as long as your not getting condensation you should be all good. Some weather forcast include the dew point, that's the temperature that the moisture in the air will condense, usually if the sun is out you are good, at time"s as the sun goes down and the air cools you may get to the dew point but around here that usually happens in the night (thats why the grass is wet in the morning around here). So where I live flying to get the sun rise may not always a good idea as we often get condensation and all get's wet early in the morning around here. It has happened very few times that my craft came home with a bit of condensate, I leave the warm battery in the craft and let the condensate on the craft evaporate off in my home.

 

[WetDog]

Flying in a condensing atmosphere isn't bad for the drone unless it is starting to freeze. Icing conditions aren't a good time to fly. The props probably won't ice (they're moving fast and are very thin) but ANY ice on the prop will be most deleterious to your flying performance.

The only real problem with moisture is on the lens. Although it can create an interesting artistic look, water droplets on the lens tend to wreck havoc with your story telling. I have flown through fog, hit clear sky and have water droplets dry off after a minute or so allowing me to film. Doesn't always work out, but you can try.

And, of course, it the condensing atmosphere is too thick, you can't see through it so you're not flying in VLOS. Which is bad.