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Old 07-11-2018, 01:58 AM   #1 (permalink)
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Join Date: Apr 2017
Default Heli-Spin

I have had several major impacts on my 250 over the year, one being where I autoed onto a Lake (had pontoons fitted) but the washup drenched my electrics/motors/camera and totalled the battery.(I dried out everything and had flown 5x since with no probs) My last impact was completely random where the heli started rotating about the vertical axis! The first time this happened I powered out and the rotation stopped, but as I was bringing it into land it went bezerk and I struggled to hold it before it too started rotating about 5x to the left before impacting into 100ft trees.No damage other than CF tailrotor as the OWB stripped saving everything else. Have just replaced the OWB and test flight/hover good even without need of a trim flight. My concern is when/is this going to start pivoting on me again? I'm suspious of the ESC being the instigator of my uncontrolled rotation (No signal to t/r) but with everything the machine has been thru I don't blame something from giving up, but darned if I know what! Listen to the audio in the U-tube clip and you can hear a rotor pitch change just prior to rotation.
Blade 250 CFX Heli Spin (2 min 45 sec)
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