If I'm flying at an altitude above my set RTH altitude, does that mean that the drone will drop down to the RTH altitude if I loose signal?  Or will it maintain the altitude it was at when the signal was lost.  

I will be flying up to higher altitudes even though my altitude above the ground may only be 50-100 feet.  If the drone drops to the RTH altitude, I'd dive into the ground.  

If I set the RTH altitude to an extreme height to avoid diving into the ground, I may very well get up into extreme wind velocities.  Not a good plan.

Great question! The RTH section in the manual is terrible.

I’m anxiously awaiting to hear what others say about this.

"If the drone drops to the RTH altitude, I'd dive into the ground."

I don't know the answer to your question myself but if I were you, I'd lake my chances with the wind. The drone is much more likely to survive the wind than running into the ground.

How high of winds are you thinking? I've had winds of 37mph and the drone made it though OK.

How about testing this? You could take it to a safe area and set RTH and see if it drops in altitude right away or not.
I hope you update us if/when you test this.

If you are above the RTH altitude, its supposed to maintain current altitude.  

sbarton Posted at 4-19 09:26
If you are above the RTH altitude, its supposed to maintain current altitude.

That is what I'd like it to do!!!  I'd definitely take my chances with the wind.  

I've been fighting the wind around here for the last several days.  No wind up to about 100 ft., but after that, I end up getting the "High Wind" warning constantly ... and fly at an angle just to maintain the direction I want.

Duane Degn Posted at 4-19 08:05
"If the drone drops to the RTH altitude, I'd dive into the ground."

I don't know the answer to your question myself but if I were you, I'd lake my chances with the wind. The drone is much more likely to survive the wind than running into the ground.

Yeah, I'll try to go test this in a few days, once our latest snow storm has passed.

My thoughts (based on previous DJI drones):
-RTH altitude is based on the takeoff altitude. If your takeoff is at 1000 feet above sea level, that is 0. RTH altitude set above this "0 feet" location.
-RTH will use the bottom-facing sensors / GPS / compass / altimeter to (try) to prevent a crash into the ground when it's landing.

I just tried this on the FPV.  If higher than the RTH set height and I initiated Smart RTH, it maintained that height and came directly back until it was over the home point and then tried to land.  If lower than the RTH point and I initiated Smart RTH it immediately raises up to RTH set height and came directly back.   

If I was lower than RTH set height and I shut off the remote control simulating losing control signal (emergency RTH), it kinda retraced its course for maybe 50' and stopped and then raised up to RTH height and came directly back.  
Neat, but I think it should go a little further than 50' and also it should wait at least 3 seconds or so before raising up to RTH height in order to give the controller a chance to re-connect.  Reason being is in case you where flying under tree branches or something when you lost signal.  Better chance of reconnecting to controller and flying back under control safely instead of rising up into tree branches or something.  

EDIT:  I also did a Low Battery RTH.  It stopped flying, went to RTH Height and then came directly back.  

I think it may actually rotate before going to RTH Height in order to get an idea of whats around it before going up.  Not sure though, will have to test again.

sbarton Posted at 4-19 15:45
I just tried this on the FPV.  If higher than the RTH set height and I initiated Smart RTH, it maintained that height and came directly back until it was over the home point and then tried to land.  If lower than the RTH point and I initiated Smart RTH it immediately raises up to RTH set height and came directly back.  

If I was lower than RTH set height and I shut off the remote control simulating losing control signal (emergency RTH), it kinda retraced its course for maybe 50' and stopped and then raised up to RTH height and came directly back.  

Nice test !   That largely answers my original question.  I had not really thought through what might happen when flying under tree branches when signal was lost.   hmmmmmm

Nice test, thanks for sharing that!