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Home✈️Aircraft🚁Helicoptere-BladeBlade mCPX › suddenly rolls left from a hover
07-25-2012 01:37 AM  8 years ago
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tcprogrammer

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Worcester, MA

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suddenly rolls left from a hover
Hi folks, I've got a few dozen flights on my mcpx and it just developed a nasty behavior. I lift off, bring it into a hover perfectly about 5-6ft off the ground. If I just hold the hover for about 30 seconds or so, all of a sudden by itself it will just roll left HARD (as if I gave it full left cyclic) except I did no such thing.

The only changes I made recently was the grommet mod since it was developing a little shakiness from the slop. Since it seems to behave perfectly for that first 30 seconds of hover, I can't imagine how the grommet mod could be causing this.

I have repeated the above test three times in a row, completely turning everything off and on again, and it has done it each and every time. Any ideas how to troubleshoot this? FYI its the v1 mcpx and I am using a DX8 radio (not subject to any of the recalls/bulletins, I checked.)

Thanks in advance.
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07-25-2012 08:03 PM  8 years ago
tcprogrammer

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Worcester, MA

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RESOLVED
First, I want to say how I was able to reproduce it: I was able to hold it in my hand, grasping the gear and the base where the tail boom attaches. Obviously this isn't the safest method, but it does work. I spooled it up to 50% throttle and then slightly pivoted the heli around. I was then able to witness the entire swash rolling to the left. I didn't get my face too close but it appeared that the servos were moving together when this happened.

Now, the solution: This does appear to be something in the board. I actually had another spare replacement board which horizon had sent me (for a previous unrelated issue that turned out not to be a problem with the board). So, I just swapped the board back to the original.

Not only does this problem appear to be solved, but the thing actually flies more stable than it did before! Nearly hands off in a hover.. amazing! Lets hope this board lasts a while.
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