I have a project that will require my Iris+ to takeoff and fly anywhere from 6000ft to 10000ft above sea level. The aircraft will only be about 300ft above the ground. I have run the numbers in ecalc and found that my required throttle will be over 80% just to hover with no payload. Which has me very concerned that with payload it may not even be able to take off. Does anyone have first hand experience in operating at these altitudes, and can you share the weight of your aircraft and flight time, or a data log that I could look at? I contacted 3DR support, and got the response of it should be fine, but I do not think that the response was based in testing / calculations.
Thanks for any help.