MCPX V2 Questions - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-15-2013, 08:31 AM   #1
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MCPX V2 Questions

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Hi guys, I have an MCPX V2 and am using a DX7s tx. I have had the heli for about a week and a half and am learning the basics of flying it. I have it set up as per the DX8 settings in the manual and have also adjusted the servo arms so that the heli is at 0 pitch at mid stick. I have noticed a few things and wanted to know if these are normal. If they are not normal, then please suggest how I might solve the issues. Thanks guys.

1. When I try to do a pirouette, the heli looses a couple feet of altitude

2. After I swap the battery for a fresh one (Tx on the whole time), sometimes I find that the heli wants to tip over on take off

3. I fly in a parking garage and am not doing much more than hovering and flying the heli gently back and forth without much speed at all and yet I notice that sometimes the tail starts to wag (I thought that this was only common when outside in the wind or when doing flips and rolls etc.)
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Old 08-15-2013, 10:24 AM   #2
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Re: MCPX V2 Questions

Check your feathering shaft/spindle. I'll bet it's probably bent.
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Old 08-15-2013, 12:53 PM   #3
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Re: MCPX V2 Questions

The Heli is extremely light. If you give tail input and slightly decrease the throttle/pitch at all you will see movement. You can change your pitch curve a bit so at center stick your are hovering with enough pitch to hold her up.

When you plug in a new battery be sure to plug it in fast and set it down to initialize without movement. Gyro cannot move during initialization!

For the tail wag. You may need to adjust your gains in the radio. Drop it a few numbers.
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Old 08-15-2013, 03:50 PM   #4
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Re: MCPX V2 Questions

i always plugged my battery in while it is outside of the holder and waited for initialization. then you can pick up heli and insert battery in tray. every move you do will affect height. its the physics of a heli. you will always be working collective to maintain a height. the wag sounds like gain settings for sure. after every crash, always check the white gear to make sure it didnt slip down. start stocking up on the dogbone links. happy flying
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Old 08-19-2013, 03:09 PM   #5
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Re: MCPX V2 Questions

Since the rudder is on the same stick as pitch/throttle , It is very easy to unconsciously move the pitch/throttle without even realizing it ,...
A cp heli will generally not stay perfectly flat in piro's either..
It is normal for helis to have a lean , you dont want to spend alot of time once the rotors reach takeoff speed on or near the ground., get it up out of the rotorwash & groundeffect air rather quickly...Tail wag is very common on this model , sometimes it wasnt left to initialize long enough on flat surface , sometimes small breezes can affect it ,...One thing that helps alot is to check & oil the bearings on the main rotor shaft with something like triflow ,its surpising how many times that fixes it , would be feathering shaft ,...check if its bent by taking off a rotor blade & turning the feathering spindle screw in the blade grip ,...look at the other blade ,...if it is wobbling up & down as you turn , the feathering shaft is bent ,...& should be replaced ,sometimes the tail rotor blade can become a little bent & lose its pitch , can GENTLY twist the tail blades to bend a litle pitch back into it , also you will get all kinds of strange & erratic behaviors if you are not using a known good fresh strong battery that has been taken care of , & it is normal to sometimes have what is called vortex ring effect in still air ,..Its like the heli gets sucked downward through its own rotar wash ,you shouldnt get that very often if you are in a slight breeze though... I think the most challenging thing about the mcpx is trying to fly it slowly , you must constantly remind yourself through your maneuvers to try to keep the disc as flat as possible, acceleration happens quickly & you have to be on the ball to counter act this
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