CX2 sideways (non yaw) drift

[grendel2000]

Hello to one and all! Looks like a GREAT place here.

Here's my sad, sad story...

Purchased a brand new CX2... Had the obligatory first crash - no biggie; replace a few blades and off to the races with no problems... Had the obligatory second crash - BIG problems. Bent outer shaft (discovered when replacing lower rotor hub with aluminum - new one would not slide all the way down shaft. had to lightly file its inner diameter to get it on all the way). Ultimately figured out that the problem was the shaft, not the hub.

- Replaced the blades
- Added aluminum lower hub (as detailed above)
- Added aluminum swash plate
- Added aluminum cap thingie under balance bar assembly
- Replaced BOTH shafts (just for grins)

Heli still shakes/ vibrates fairly violently at speed.

WORST OF ALL, it now has developed a sideways drift to the right that is EXTREMELY pronounced. It occurs immidiately on takeoff and there is no apparent trim input meant to correct it. Note that this is NOT yaw - the aircraft points straight ahead but sidesteps / banks to the right HARD.

Any suggestions?

I'm a RC newb, but flew FA-18 Hornets for the Navy. I know it doesn't translate to rotary wing, let alone RC, but I at least am somewhat familiar with terminology. Additionally, my brother was an Apache pilot so the rotary world is not completely foreign.

Any help would be HUGELY appreciated.

PS - why are the ZERO instructions on assembly/disassembly/repair when it is obviously integral to owning one og these things? Where can I find good maintenance information for my CX2?

Thanks!

[LockMD]

only thing i can say about the shakes is to double check your shaft(s) install sounds to me they are not true or you dropped a bearing and didnt notice it.

the drift - adjust your swash plate - at work now but from memory - with the nose pointing away from you remove the right connector and turn it counter clockwise suppose to do half turns and test after each but if its that bad I would start with 2 full turns test and do half turns from there.

[MikeCrasher]

Hello to one and all! Looks like a GREAT place here.

Here's my sad, sad story...

Purchased a brand new CX2... Had the obligatory first crash - no biggie; replace a few blades and off to the races with no problems... Had the obligatory second crash - BIG problems. Bent outer shaft (discovered when replacing lower rotor hub with aluminum - new one would not slide all the way down shaft. had to lightly file its inner diameter to get it on all the way). Ultimately figured out that the problem was the shaft, not the hub.

- Replaced the blades
- Added aluminum lower hub (as detailed above)
- Added aluminum swash plate
- Added aluminum cap thingie under balance bar assembly
- Replaced BOTH shafts (just for grins)

Heli still shakes/ vibrates fairly violently at speed.

WORST OF ALL, it now has developed a sideways drift to the right that is EXTREMELY pronounced. It occurs immidiately on takeoff and there is no apparent trim input meant to correct it. Note that this is NOT yaw - the aircraft points straight ahead but sidesteps / banks to the right HARD.

Any suggestions?

I'm a RC newb, but flew FA-18 Hornets for the Navy. I know it doesn't translate to rotary wing, let alone RC, but I at least am somewhat familiar with terminology. Additionally, my brother was an Apache pilot so the rotary world is not completely foreign.

Any help would be HUGELY appreciated.

PS - why are the ZERO instructions on assembly/disassembly/repair when it is obviously integral to owning one og these things? Where can I find good maintenance information for my CX2?

Thanks!
On the ground, Ensure the throttle stick is off/all the way low, and move the right stick right/left, forward/backward. Ensure that the blade changes with each movement and both servos are working. I had one servo with gears stripped (which could have happened since you bent the shafts). Just don't get to close to the cx and ensure the throttle stick is in the lowest position before checking for safety. Mike

[grendel2000]

Thanks guys!

Will do. I'm in the middle of a move but will do as you say ASAP.

[carlo_the_wonder_frog]

Check the bearings that the main outer shaft goes through, there are 2 bearings and both should turn silky smooth with no notchiness. Also make sure you have the flybar ball link on the ball at the leading edge of the blades, if it gets reversed to the trailing edge you will have all sorts of problems.

[Lastinch1]

You can learn all you need here
http://www.rcgroups.com/forums/showthread.php?t=454677
although for the CX1 it is nearly the same for trouble shooting

[pilotwi]

Carlo

Tell me a little more about the leading edge, trailing edge link. On mine the link is always connected to a trailing edge and a leading edge. Maybe I am not understanding you correctly.

Thanks

Bob

[carlo_the_wonder_frog]

The top rotor spins Counter clockwise. The ball on the blade needs to spin into the rotation before the ball on the flybar does. basically the flybar will lag behind the blade. The flybar ball link will attach to the blade ball directly below it, not to the other side. I hope you catch what i am trying to say, its hard to get it wrong, but it can be done and makes the heli try to roll.