I haven't messed with my CP in soo long, so I decided to get it out of the box and play with it. Once I did I remembered I hadn't messed with it in so long because it had a bad wobble in the head. I changed two main shafts, spindle, and various other things only to try two new blades today and that fixed it. Easiest(yet still most expensive thing) to try and I never did.

But I started over, from scratch, and trimmed the CP out. I turned to gain all the way down and set the proportional, and flew two flights on it, each about 10 minutes, all the way through a battery, just to get an approximation of how the trim shifted and overall affect throughout the batteries life. I got that figured out and then I got to the gain. As soon as I turned the pot just a tiny bit, the tail came to life at no throttle and half trim and wouldn't shut off. I thought about it and thought maybe I could have nudged it one way while it was initializing. Tried again, same thing. So I held onto the skids and turned the gyro up more, now the tail went even harder. Then I figured I would turn it off, set the gain a little, and just spool it up. Once again, it just spun in circles. Then I checked to make sure I was setting the gain, not the Proportional. I was. So I'm stumped. What am I doing wrong?

I also included some pictures in case anyone spots anything wrong with my setup.

hrm, that's not so good. The front one is the gain for the gyro on the 3 in 1. The proportional needs to be set without any power. that might all be info you know though.... I can't really see on your pic, but is the gain turned nearly all the way up?

Unplug the battery and turn the gain all the way down and the proportional about half. Arm the heli and see how it does, unplug the battery and make the adjustment to the proportional until it gets where you want it, then after that you can adjust the gain with the battery plugged in. Just adjust it until the tail wags a bit, and then turn it back down enough so that it doesn't wag =)

This is just a normal CP, so it's a 4-1. Unless I'm mistaken and it actually is a 3-1? I set the proportion correctly with no power, I have it set good, as the where the CP displays very little drift in one direct direction. But it does, and once I got it to as best as I could, I started the Gain tuning. Let em try and elaborate.

At this point is where I hit my problem. The gain acts funny. Right now, in the picture it is all the way down. As soon as I turn it up just a bit, the tail will start to spin continuously as soon as the throttle is nudged up. I haven't even gotten it off the ground with gain up any because it will just spin in circles because the tail won't shut off. Any ideas now? Bad 4 n' 1? If a video explanation will help, I can certainly make one of those!

hrm, yeah you could fix that probably by getting a new 4 in 1, but as far as what is actually going on to cause it within the 4 in 1, that's above my head =(

If you slammed into something hard probably the gyro mechanism broke or is some how making a connection all of the time instead of just when it yaws when it shouldn't be.

Where is your throttle subtrim sitting? I know on my blade that I can push that up to half way and the tail will start spinning regardless of the main blades. If I keep pushing it up then it will get faster and the main blades will start to spin. Try setting your throttle/pitch trim all the way down and see if that keeps it from spinning. There is a fine balance of mixing and gain in these little birds which is why many add in a head locking gyro.

Your system may be blown but at least check your throttle trim, but if you can at least fly it then you seem to be able to have some fun. Play with it till it as long as you can or at least until you can upgrade or not stand it anymore. I am now adding in a G90 head lock gyro and a new receiver to my BCP. Good luck

Smiley

I would turn your proportional way down and then increase your gain. To me, the two work hand in hand. If you turn the gain up then the prop needs to come down and visa-versa. On my setup, both the gain and porp are about midway on the pots. Start there and see what happens.

I tried several of those things. None work, it always seems to act like a proportional. The more I turn the gain up the higher the tail revs, which si not supposed to happen. I made a short video of what is happening. The CP had just been initiated, the throttle was nothing and trim nothing. The gain was also set to nothing, and the Proporton was set to where the CP won't drift too bad. Then, I gave it slight throttle to make it spin a little. Next, I turned the Gain up. The video shows what happens. It's acting like the Prop. I don't get it. Any more suggestions?

http://www.youtube.com/watch?v=4WX9xYO6MFg

Link is up, but I just uploaded it so it may take a while to process.

so if you turn the gain up and just leave it does it still just run faster the whole time?

try this kind of test with it and see if the tail acts like it does in this video then come back with the results =)
http://www.youtube.com/watch?v=_TLD8CqsN0M

Yes it does. But I think I've found a good setup right now. I set the Proportional at about half, and now I can just use my gyro as a Proportional and I don't even have to turn it off! It also flies quite nicely now. I think the gyro still works in it, but when I turn it all the way up I don't see the wag I used to. It just acts like its an HH gyro almost, it's like it will run and run like it wants to get to a spot, until it gets there, and then it just keeps running. I don't get it. But, my CP flies nice right now, and I think I see a T-Rex SA in my future anyways!

Remember the settings do not take effect until the system is reinitiated.