Blade CX3 Help

[kilo2018]

I just cant get my heli to stop drifting, no taking off the the left (tail to me). I did as the instructions said and no matter what direction I turn the proportional trimmer it makes no difference. I am powering down the 3 in 1 between each adjustment. What do I do? BTW when the CX3 instructions say the nose of the heli is the nose to be facing me or away?

[jasmine2501]

You should be practicing with the tail towards you if it's your first time. The proportional pots are very sensitive, and it's easy to go back and forth past the point where you need to be. Your adjustments must be ridiculously small. While you adjust the proportional, turn the gain down all the way. Then when you get the drift down to a slow drift, turn up the gain to eliminate it. Do this process with the rudder trim centered, and don't be surprised if it takes a couple batteries to get it dialed in perfectly.

[kilo2018]

One would think with the gain turned completly one way and the heli takes off one way when you turn the gain the other way the heli would take off oppisite of the previouse direction.

[jasmine2501]

No that's what the proportional adjustment does. Proportional is adjusting the proportion of power directed to each motor - it needs to be adjustable to deal with differences between the motors and the higher mechanical resistance on the bottom blades.

Gain adjusts the sensitivity of the gyro - turn it too low and the gyro doesn't react to drifts and won't compensate at all. Turn it too high and the gyro overreacts and compensates too much, and this causes what we call "tail wag" - a rapid back and forth movement of the tail whenever it makes a correction.

[kilo2018]

Ok, I think I got it. Make adjustments in very small incriments. Now when in hover its as if the heli is tied to the celing with a string making ever so larger circles. What now?

[jasmine2501]

That is what we call Toilet-bowl Effect :)

It is usually caused by the flybar being off balance. Measure the distance to the little stoppers on both sides and you'll find that they can slide a little bit - make it the same distance from the head on both sides, and it should be balanced.

The TBE can also be caused by the whole helicopter being off balance, or by a draft in the room. You should be able to minimize it, but if you can't eliminate it, don't worry about it too much. The larger coaxials will move around a little bit in a small room, due to what I call "wall effect" where the rotor wash blows off the walls and back at the helicopter and pushes it around. You can see it in some of my videos.

http://jazzyflight.blogspot.com/2007/11/blade-cx2.html

[hobby-plane-rc]

I have a quick question. The outer shaft on the CX3 has a hole in it right. Is that were the lower rotor head top screw enters? I am replacing the lower rotor head and need to know if the top screw sits in that hole :confused:

[Wyatt450]

I have a quick question. The outer shaft on the CX3 has a hole in it right. Is that were the lower rotor head top screw enters? I am replacing the lower rotor head and need to know if the top screw sits in that hole :confused:
Yes.

[jasmine2501]

Be careful not to screw that one in too tight, or it runs into the inner shaft and causes all sorts of problems.

[hobby-plane-rc]

Thanks guys, just wanted to make sure of that before I did anything. One more thing I noticed was that my swash plate keeps coming apart, might that have to do with the rotor head or do I just need a brand new swash plate?

[Wyatt450]

No need for a new one. A lot of them are coming apart. Just CA it back together and it will hold.

[hobby-plane-rc]

I never thought of that, I always thought it would keep it from spinning if i CAd it, maybe I just need to look it over a little closer.

[arbilab]

The CA has to go in exactly the right place and nowhere else. I'd almost rather replace it than try to CA it.

Best is to stop crashing. I know how hard that is. But clumsy as I am I've only separated the swash twice in 4 months. Seems to do with vertical fall distance. Your crashage may vary. And they do just snap back together, the first few times anyway.

[hobby-plane-rc]

Your right its not that simple to ca it back but it can be done. I did, and it has held up great ever sense!! No need for a new one! The ca goes on the top peace of the swash plate about two nice big drops of ca or crazy glue on each side should be fine, then just snap it back on :)

[kilo2018]

Be sure not to use thin set CA. Use medium with a toothpick to apply.
Better yet get the cnc swashplate.