So I've had my mCPX for about six months. I've done a lot of flying and crashing and put in a lot of simulator time. I'm trying to make the jump to inverted flight which I'm very comfortable with in the sim but don't seem to be able to get IRL.

The main problem as far as I can tell is that the tail rotor doesn't have enough authority to keep the heli from spinning out when I'm inverted. Do I need a remote that allows me to tweak the pitch curves to get this to happen (I'm currently using the DX4e that comes with the RTF package)?

My other thought was that I didn't have enough negative pitch and so I was pushing the motor too hard when upside down. I tried adjusting the servo arms for a more balanced pitch profile (equal positive and negative) but that seems to have made it hard to just hover because of the throttle being so close to 100% and inverted seems to have the same issue (for the few seconds I've held it there before spinning out and crashing.

Any suggestions?

Thanks for the help.

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Im a new mCPX owner...but have read a lot on it and have flown it probably close to a hundred times already myself in the past 3 or 4 weeks that I have owned it.

What I hear on the grapevine is that the tailboom on a stock one is just too short (considering you have a V1...think they made it longer in the V2 but cant be sure about that).

Most people are making their own booms from a solid carbon fiber rod and extending it by an inch or two, you should read up on this and not take my word for it.

By using a longer boom and also a larger diameter tail rotor, its supposed to solve the tail blowout problem people speak of.

Also...if you have TOO MUCH pitch in either direction, it will cause tail blow out.  This I can say that I have tested as I have a DX7 and I had played around with pitch and throttle curves.  The tail will blow out more...the more you increase the pitch.

From the factory, my heli had way more negative pitch than positive.  But since I have mine bound to a DX7, I was able to go in and adjust the pitch % rather than adjusting the linkages like you did.  In your case however, you have no other choice as there is no way to adjust pitch on the DX4e.</p>