I just put the Dynam Vortex Flybar, with adjustable weights, on my CX2. First thing I noticed was the difference in sound. It seems to be deeper, and not more quiet, as I expected. It has more of a thumping sound. Sometimes it makes a deep, louder thumping noise. I can't seem to determine if it is happening as the result of a particular control input. I might hear it more on liftoff or when gaining altitude. The blades don't track as perfectly as the stock flybar and I can't get it to perfect by adjusting the linkage. Mine is screwed in almost all the way as compared to the stock flybar which had 5-8 threads between the two halves (linkages). There is no TBE the way I have it now.

I've also noticed a new glitch, of sorts, where the heli makes a clicking sound, very faint, and it drops about a half inch almost like it has lost power for a fraction of a second.

I also think my flight times have dropped about two minutes from my previous full charges. I have two different batteries and they both show this loss in flight time. (MegaPower & E-Flight)

I just wanted to throw this experience out there and see what you thought. Does anyone have the DV flybar and does any of this make sense? Can these new problems be attributed to the new flybar. Does yours sound like what I've described?

Additional info: The new flybar definately improved handling and continuous foward flight. Also seemed to reduce the bouncing around after an aggressive maneuver.
I have the Boomtown CF tail and also cut the front third of the tail section to fit over the boom and o-ring. I think it looks great and will post a picture soon. Sorry, I like those little side wings even though it diminishes some of what is gained by putting on the CF tail boom.

Thanks

I know you asked about the dynam vortex flybar on my [link=http://www.rcuniverse.com/forum/m_5910742/tm.htm]Flybar Mod[/link] thread.
I didn't know anything about it, now I guess since you have one, I can get some info from you as I am curious as to what it is.
Could you post a link? What is the length of the flylbar ? Either total length or how far from the ball where the link hooks to the end of the flybar.
Do you have a scale or do you know the weight of the weights?

I would check the gear teeth and also make sure both the inner and outer shaft don't have any up and down movement.

[link]http://www.slickzero.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=VTX-002&Category_Code=VTXParts[/link]

Hope the link works.

Flybar is approx. 3" from ball to end of weight. Total length is approx. 7".
Sorry no scale. Weights approx. 10 cm long with rounded end, 7 cm diameter.
Secured with with sm. hex head screw. They seem fairly heavy for what you've been doing, my guess is they're probably not much lighter than the stock without rubber boots... if at all.

I just had two more flights and the noise I'm hearing is more like an old fan beating the air or if someone blows in your ear. It seems to happen when I lower the throttle to lose altitude, more so when done rapidly.
It actually flys with more control then before but I really feel the motors and battery are running hotter and for a shorter time. It seems like it's working harder to make altitude.

Appears to be no binding in flybar. Rotors are still very slightly off in tracking, half turn in either direction on linkage makes things worse.

I could always go back to stock but since I added the cut tail section to the CF boom I could really use the extra control.

Hi There....LHS suggested that I gently file down the bottom (female screw thread) portion of
the linkage...only so much you can do there to shorten the linkage overall without trimming the male screw thread end (a possibility)...but I got a little tightening of the linkage and leveling of the fly bar by doing that...seems to help....looking for a smaller linkage if anyone out there knows of one...
cheers, John H.

I flew two more batteries and after some adjustments the CX2 fly great again.
I'm not sure what I did that fixed all of my problems but here it is.

1. I did not remove the ball links on the flybar linkage but I did reposition the links on the balls so that they are "more square" with the balls and rotors if that makes any sense. I just twisted them within the available range of motion.
2. I tightened the flybar holder screw thinking there was a little too much play in there.
3. I didn't notice at first but the new flybar seems to have caused the need to readjust the elevator and aileron trim tabs slightly more in the same direction they were previously set. Apparently the new flybar magnified the slightly unlevel swashplate.
4. I also lowered the motor gain pot to correct a slight tail twitch that has always been there.

My last battery was nearly perfect: stable hover, excellent control, continuous foward flight with a single forward control input and all the glitches and noises seem to be gone.
I guess the next step for me is to level the swashplate by adjusting the servo pushrod control links. Although it is still well within the trim tabs ability to correct. The elevator tab is just below center and aileron is slightly less than halfway between center and full left.
This never needs to be changed during flight. I am, however, constantly adjusting the rudder trim as the yaw changes due to what I believe is a heating up issue with the battery and motors as the flight progresses. This has always been the case and not a problem.

Check my thread here " CX2: CF Boom & Front 3rd Stock Tail" if you're interested in what my mod. looks like. Pictures are before I installed the Dynam Vortex Flybar discussed here.

Some of your noise issue may be due to weight. If you put the some of the stock tail over the boom, you have added weight. The CX doesn't care much for that. And if the new flybar adds just a bit more weight your flight times will be shorter than before.
I don't know for a fact that the new flybar is heavier, but I think that the secret to their success is a shorter bar with heavier weights. That will improve flight dynamics, as you noted, and also leave a good hover. The downside is the extra weight.
Too bad we can't have it all.
Soloboss

This must be a typo, I would think MM. And if that is the case (millimeters) , then these things are HUGE.

Go to the LHS and you can get a "bag of weights" (Great Plains brand has them ), with 1/16 ID.
Or if you can't find them, get a set of Blade CP Pro flybar weights.....they are more expensive, but they should
fit. Try them all the way out on the end....if it is too touchy for you, then you can put 2 weights out there and try
it.
Then you can start working with moving the inner weights in.

Soloboss,

Good thinking, you may be correct that it is a weight issue.
I did cut out some of the sides of the added tail section (covered by the front canopy). My thinking was that the servo arms (horns) may have been rubbing that area so I cut that out as well. Weight was also a consideration so I didn't hesitate to cut away.

As I mentioned above everything is working great, continuous forward flight, added control etc.

The main thing I noticed and attribute to the side wing was a looping correction after a fast, level forward manuever. If I let the right stick snap back to center the heli would do a crazy backwards loop and gain or lose a lot of altitude. With the carbon fiber tail boom that looping "recoil" went away. After my tail section add on some of that came back. Now after some tweaking it seems to fly as good or better than ever.

Soloboss and Balance,

I have followed a lot of what you guys have been doing and writing about. i.e. Flybar Mod & Overall CX2 Setup
I thank you both for that info. I am new to RC in general not just helicopters. I've gotten this far in about a month because of you and a few others.

Again, thanks.

OH yeah, and I almost forgot....here is your link
[link=http://www.rcuniverse.com/forum/m_6127207/tm.htm]Tail boom with partial tail body[/link]


To do a link....click on link at the top of your response page......type in the url....or go to the url and hit copy,
then right click and paste the url in there and then "call" it something by typing in the name.

Balance,

Oops, you are correct...millimeters!
Yup, big...Soloboss may be right that they are indeed heavier.

Hey.....we are all in this together.