bingo field

After I had a rotor strike on the side of my bed, I have to remove and reattach the servo arms to get the thing back in trim. It doesn't feel like the gears are damaged, but I am wondering if this is normal. Shouldn't the arms be attached at the horizontal position? Mine are both pointing up some to get the trim correct. Any ideas? Thanks.

soloboss

You're on the money, Bingo. With the stick at center and the trim at center, set the arm to horizontal. Then adjust the length of the linkage so the helicopter hangs motionless in the air. When it's right you will be able to attain a stable hover in a large room, set the Tx down and walk away from it. Several months ago we had a contest to see who could get the longest unassisted hover. These little birds are pretty amazing when they are tuned correctly.

Soloboss

bingo field

I had the linkages adjusted, it was after the rotors hit the side of the bed that I had to move the arms up to get the trim back to normal. Otherwise it had to be about half throw forward and left to get it to hover stable. I was wondering if the gears inside move or pop over each other a tooth or so throwing the internal timing off? Do they strip and you have to replace the gears, or do you replace the servos instead?
Thanks again.

gi1mo2

I also had a strike and had to replace the lower rotor head becaus the two pins the blade fit in were also broken (waiting for the aluminum version from my local dealer). When I replaced the lower rotor head, I didn't notice the top screws fit in a hole in the outer shaft, and had a hard time trying to align the swashplate at the horizontal level. I then notice the hole and only had to turn the servo pushrods one to get the thing level.

I'd love to know all the tricks to get the CX2 to hover by itself. Mine still has a rotation to the right which I can't seem to correct with the trim or servo proportional gain. I did change the original motors to Xtreme SE180 which are great, and hover was good for a while (until I hit some overhead wires and broke the lower blades [&o]. I replaced them. Upper blades seem perfect).

bingo field

The yaw problem I can't get rid of. I had the thing adjusted to where the right stick was totally hands off, but you had to hold a little on the left stick to stop the yaw. I was looking to see if there was some kind of a timing issue in setting the servo arm horizontal, as I now have to install it pointed somewhat up to the right stick trimmed out correctly.
The proportional adjustment on mine has no dead band in the middle, half the thickness of the slot causes it to either yaw to the left or the right. I have it set to where the stick is just a little to the right to hold it still. Last night I progressed to where I could do 2 turns to the left or the right without losing it. I even was bold enough to fly ovals in both left and right directions. I am not concerned with 3D at this point, I would really like to accomplish scale like flight, and move to a CP type machine.

bingo field

I figured it out. The lower rotor head had drifted up about 3/16" which was why I had to move the arms on the servo to make up for the added distance. I pulled out all 4 screws and had to spin the shaft while moving the head up and down on the shaft to find the hole that only 1 screw goes into. I got that done, and then had to recenter the arms for the servos, then adjust the linkage length again.

marcolima

Hi, gi1mo2

Times ago, I upgraded my heli: heat sink and carbon tail. After assembled it, I noticed the heli going to foward and drifting to left.
After a lot of work, time and endurance...now it hovering nice. I assembled it wrong and I did small corrections by moving times to up times to down the lower rotor head until to find the correct point and leveled swhasplate as well as did bingo.

AH-64_d

Bingo Field,

There ought to be 2 holes on the outer shaft. They are opposite one another and are probably made by drilling all the way thru the shaft. I poke a small screw driver thru them and the 2 corresponding holes in the rotor head. Swirling the screwdriver around aligns the holes in the rotor head with the holes in the shaft.

bingo field

I thought there should be 2, but mine has only 1. As soon as I got the shaft and the head lined up, I put the first one in, and expected to see the other one on the other side. Not there. I had removed the lower 2 screws, and there were no holes there either. So far, it's good. I don't think the upper one was in in the first place. I am getting better flying this thing, I can now do right and left circles and right and left squares, 360's in both directions, and I now have spent some time flying X's crossing in front of me and flying straight at me (that's the toughest for me) along with halting forward movement and hovering at random points in between. Now that the shaft isn't creeping, all my stick adjustments are holding and the yaw problem isn't that tough to deal with. I do notice doing 360's that one direction it will spin much faster than the other, left turns require more stick than right. Again, no huge deal, I am getting the majority of the controls down. [8D]