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Jan 29, 2012, 09:34 PM
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mCPX Rotor Issue...


I got the mCPX yesterday and I crashed it a few times. Normal stuff, no parts flying everywhere. Well, now when I spool up the rotors, they make a luffing noise after a certain RPM. It's similar to when a turbine plane feathers the props while doing the preflight test. I've added a video so you can see what I'm talking about. How can I fix this?

Thanks in advance,
-Kade

mCPX Problem (0 min 25 sec)
Last edited by aceofd1amonds; Jan 30, 2012 at 07:39 PM.
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Jan 30, 2012, 07:38 PM
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Come on. I WANT TO FLY!! Someone knows what's going on here. Help me out!
Jan 30, 2012, 08:15 PM
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P.I.Engineer's Avatar
video is private
Jan 30, 2012, 08:24 PM
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Thanks. Should be fixed now.
Jan 30, 2012, 09:54 PM
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Looks to me like the blades aren't pitching? check the swash plate and linkages and make sure the servos are moving and responding cyclic inputs.
Jan 30, 2012, 10:15 PM
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Your main gear has slipped down on the shaft. It's a feature to protect parts from stripping out in just about any crash. There should be no up and down play at all if you pull up on the head, and I bet you have a few mm of play in yours, which causes that sound and lack of enough pitch to fly.

Snap the main gear back up on the shaft until you hear it "click" and then you will be back in business.
Jan 31, 2012, 08:15 PM
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You were right, XRAY. Fixed. thanks!


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