<div style="background-color: rgb(255, 255, 255); padding-top: 5px; padding-right: 5px; padding-bottom: 5px; padding-left: 5px; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font-family: Arial, Verdana, sans-serif; font-size: 12px; ">I'm actually curious on what challenges I'd face on flying a heli at 9000ft? I dont have a real RC one yet though I am playing with a toy heli to get a feel for it and it refuses to move forward and back with any response (the tail prop is only 2.5-3"). I understand the air is really thin here and that likely more RPM's would be needed to counteract the thin air. I am looking at running an electric heli at some point fyi.

Basically I'm curious if a heli or a quad copter would be easier/better to fly up at this elevation and if so what adjustments would I need motor or blade pitch wise to get em to fly "right"?

What would be a recommended heli for something like a go pro hero camera (about 5-6oz)? I've seen everything from Parrot AR drones that can lift these to trex 450's though I'm curious with the air.

How would a larger heli perform at higher altitudes, 450 vs lets say a 700?

</div>Any suggestions would be recommended or if its even worth it to fly this high with an RC model and still have it perform responsively just like at lower elevations.