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Blade CX2 Question regarding Main Rotor

Old 12-31-2014, 07:14 PM
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Default Blade CX2 Question regarding Main Rotor

Sorry if this a repost, but my search of the forums and google did not provide an answer.

I received a new Blade CX2 for Christmas. This is my first RC Heli so I am a beginner.

Following the manual I have completed the non-motor control test. All servos seemed to function properly.

After disconnecting the flight battery, then turning the transmitter off I reconnected both motor cables ensuring I had the correct polarity (per the manual red to +).

So here is where my issue comes into play. I turned the transmitter back on then attached the flight battery (ensured that throttle was at lowest possible position and throttle trim was as far down as possible.) The main rotor started up at what I believe to be full throttle. The secondary (lower) rotor did not spin.

I have tested it by holding onto the landing skid to keep it down that the throttle does seem to work for the secondary rotor, but no movement of the throttle or throttle trim seems to affect any of the rotor speed for the main rotor.

I also tried to look at all of the motor solder connections and wires to ensure it wasn't shipped with any damage and could not find any.

I tried to call the manufacturer, but they are have not answered or returned any calls yet.

Any help is greatly appreciated!
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Old 12-31-2014, 07:53 PM
Ya got any Beeman's?
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Join Date: Apr 2009
Location: San Diego, CA
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Hi blauerman and welcome to WF. I was surprised to hear they're still producing those, so I went to the Blade website just to see, and sure enough! I must have got mine like 7 or 8 years ago. Looks like they changed it up a little, as mine had a 4-in-1 controller with the rx built in, while it looks like the new ones have a 3-in-1 with a separate rx. If you go to their page here, Blade CX2 support and scroll down a little in the window, it looks like there's some addendum to that pre-flight setup stuff under the title 3 in 1 Control Unit Mixer. Maybe that'll help? Good luck, and let us know if it works. I had lots of fun with that CX2, but it doesn't see much air time any more.
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Old 12-31-2014, 07:57 PM
Ya got any Beeman's?
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Oh, and by the way, on a coaxial rotor heli like the CX2, the upper and lower rotors are both main rotors, as they equally share the load. To control yaw, one speeds up and one slows down.
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Old 12-31-2014, 08:02 PM
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From my old recollection, when first binding the Blade coax, the throttle trim does not need to be in the lowest setting......all trim tabs should be set in mid positions at bind.......the throttle stick should be either in a full throttle position or down completely...........!

I'd try re-binding the coax again (after re-checking the manual on the throttle stick bind setting).........If that does not work, the issue is in either the battery discharge or reciever combo response.

Also, make sure that the rotors are spinning counter to each other, top clockwise, bottom counter-clockwise......if they are not, it is certainly a reciever issue......and, make sure that both rotors are spinning freely without any friction or cog catching. The rotation of each rotor is dependant of one another.....if one does not spin properly, the other will respond in-kind.
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