Thread: Discussion New Blade mQX RTF & BNF
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Old Nov 11, 2012, 01:35 PM
RoboHeli is offline
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Quote:
Originally Posted by ColSonders View Post
My MQX has dreadful stability issues when descending, even with nothing attached, even without a canopy.

I'm not convinced it's normal behaviour and believe it's related to imbalance in either the props or the power levels of the motors or a combination of those things.

Adding extra weight magnifies this issue!
Quote:
Originally Posted by Darsh View Post
I think that the instability in MQX while losing height rapidly has to do with vortex ring state, a condition commonly found in rotary wing vehicles (AKA "Settling with power").

http://en.wikipedia.org/wiki/Vortex_ring_state

Yes, it's not just your mQX ColSonders. My WLToys V929 quad exhibits exactly the same instability when descending quickly. I've learned to do kind of a spiral-looping thing with the cyclic control that lets me descend in a tight-ish column without it going unstable.

I first discovered the vortex ring state when I was carrying a #808 on my V929. The extra weight REALLY increased the effect and my first few flight videos always ended up in a pretty spectacular crash...lol Good thing I was flying over grass!
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