Hey guys. I've lurked here for months before I finally plopped down the cash for a CX2. I've been fighting with it for about a week now, maybe 10 batteries, and have a couple of kinks left to iron out. Now that I've collected several, I can put them all in 1 post.

First, I almost immediately cracked the stock boom. I ordered a BoomTown boom and installed it with some new skids. The weight now seems heavily shifted forwards. With the trim 100% back, I sometimes still get forward movement. Anyway to correct without adding weight to the tail? The C of G is shifted forward when balancing.

Non-symmetrical rudder speed. It is clearly evident that if I go full rudder right, the heli does a fast pirouette. Full left rudder, and it's extremely slow. Partial throttle on the ground and test the rudder. Full right and full left. If I compare the speed of the top blade at full right vs the speed of the bottom blade at full left, the top blade is easily twice as fast. TWICE.

All around trim. Trying to trim it in is killing me and resulting in frustration. I understand the rudder trim will vary depending on battery charge. My problem seems to be aileron trim. Left-right trim seems also heavily dependent on battery. So is battery level supposed to effect all trim, or just rudder? It's frustrating as I reach the end of flight #8 and smile as I shut it down think that I finally have the trim perfect. Then power it up for flight #9 and have it shoot right HARD.

Battery is always installed on a stationary heli, flat on the ground and not moved until the light is solid green and the gyro has calibrated. I have adjusted the gain a bit. After I installed the CF Boom, I noticed the tail was twitchy left to right and back again in the air. So I decreased it, and the tail slowly drifted left to right and back again. Found a spot in the middle to stabilize. Proportional was not adjusted.

So far, I love this. But I find the above are starting to hamper my hover abilities. I can keep it in the air for a full battery, but only in about an 8ft square. I actually have more problems with elevation then with movement. Only have about a 7ft ceiling to work with. So the heli is either a couple inches off the ground, or 1 little click more on the throttle, and it's on the ceiling. I do a lot of elevation juggling up and down to keep it at a somewhat constant elevation.

Blades have only been replaced once as I got over confident and tried FF through a 3ft doorway.

Hi,

I've had my CX2 for about a month, but I think I have some answers for you...

I changed the battery mounting by removing the "hooks", putting some velcro on the battery tray (hook) and the loop on the battery (two places). So I can move the battery forward/backward to balance (I also have the BoomTown boom).

Mine does this as well.

I don't see this on mine, and I would not think it should work that way.

I disabled the "ratchet" mechanism on the throttle, so that I can set it at the "in between" spots, because I had the same issue.

Hello and welcome to the forum. I'd just like to share a few links with your that help me get started.

Soloboss’s Guide
http://www.heli-wiki.com/mediawiki/i..._and_CX2_Setup

Dacaur’s Guide
http://www.dacaur.com/bladecxhelp.html

Flying Tips
http://www.krshobbies.com/tips.html

Flight School
http://www.dream-models.com/eco/flying-index.html

NightFlyyer's Gerneral setup and tunning guide
http://www.youtube.com/user/NightFlyyer

Swashplate Leveling Guide
http://www.rcgroups.com/forums/showthread.php?t=642401

There are many more cool links here.

Tips/Repair/Guides/Mods Links
http://www.rcuniverse.com/forum/m_68...tm.htm#6821632

Good luck and have fun.

I also use velcro to adjust the center of gravity with the battery. The aileron thing check to make sure your swashplate is level. For the gyro I start it up as high as it can go then slowly turn it down until it doesn't twitch. It will always spin in one direction faster than the other. If you can get the proportional potentiometer in a spot that won't make the helicopter rotate and have the rudder trim centered I found that helped to make it spin a little more equal.

Ok, I just followed "Soloboss's" guide step by step and let me tell you it worked wonders! perfect Im so into my heli again, the trim issues are so discouraging. and drilling holes in the 4-1 did seem to help. Once again hats off to you eat2muchrice. cexshun follow it, at least 3-6 and it will get you a nice set up heli. The issues you experienced were all on my list too. Let me know how it works for you!

Thanks guys. eat2, I've read through all of those as I have been lurking for a while. But I went ahead and read through soloboss again. Most of it I had done, but for some reason, trimming it on a table didn't stick in my head the first time I read it. It was much much easier. I think the problems I was having was due to flying in a 10x10 room with a 7ft ceiling. Lots of wash.

Only had time for 1 more battery last night before I had to go to bed. I flipped the rachet mechanism in the throttle over to remove the rachet but still give resistance. It has made hovering much easier.

Only thing left to solve is the CG problem now.

I just did a quick test this morning on the "spin" speed. I had removed the weights in my flybar earlier this week, and now it seems like it rotates more evenly in both directions. Still some difference, but much closer.

BTW, here is a link for a tutorial on the battery tray mod:

http://www.rcuvideos.com/item/TRSWNCNYHLSN8RZX

For the aft trim problem, the boomtown boom is lighter, so turn the elevator servo link shorter 1 full turn, then 1/2 at a time until stationary.

You will never get the nose to stay in place for long no matter what You do. I pulled the rudder spring out of the TX and now I have full authority of where the nose is. don't have to mess with trim, anymore.

If You have the gain set properly, it WILL turn faster to the right than to the left, if You adjust the gain down to get uniformity, then you've defeated the gyros purpose. Why is it necessary to have uniformity on rudder. It isn't that noticeable in normal flying.