tail problem.....again...

[t-driver]

i noticed some left drift and i tried to setup my tail with the 2100T and 3154 from scratch.

i did the mechanics first, (hover with HH off) but it seems it need too much pitch to get a drift-less tail in non HH mode.
is that even possible???
the slider is almost touching the case, i guess two times the pitch it usually needs, and it still drift to the left. HH on does the same.

what can cause this?
i checked if any parts bind,but they don't.
the belt is also well seated and not too loose.

another thing i noticed is it doesn't wag anymore if i higher the gain.

any thoughts?

[rotorhead58d]

i noticed some left drift and i tried to setup my tail with the 2100T and 3154 from scratch.

i did the mechanics first, (hover with HH off) but it seems it need too much pitch to get a drift-less tail in non HH mode.
is that even possible???
the slider is almost touching the case, i guess two times the pitch it usually needs, and it still drift to the left. HH on does the same.

what can cause this?
i checked if any parts bind,but they don't.
the belt is also well seated and not too loose.

another thing i noticed is it doesn't wag anymore if i higher the gain.

any thoughts?

maybe the gyro is messed up? if the servo is near the case, shorten the linkage, and move it out. only thing i can say is try it in another heli. i know thats a pain, but it's the only thing i would say that can prove the fault.

[t-driver]

maybe the gyro is messed up? if the servo is near the case, shorten the linkage, and move it out. only thing i can say is try it in another heli. i know thats a pain, but it's the only thing i would say that can prove the fault.


that is something i didn't wanna hear.....:arggg:

anything else maybe?

[rotorhead58d]

did you watch the finless videos on the hi tech 5000 gyro? maybe you might pick up some ideas from them. i'm just thinking that would be the only way to prove the gyro works. if it does, then it's something in your 200. i wouldn't want to have to do it either. i hope kharma doesn't get me...

[t-driver]

i have seen the video.
i may try again tomorow with a clearer head. maybe i missed something....(hopefully)

[t-driver]

well, i tried again today.
after a few tries i got the tail solid,as it was before.

but to do this my slider is in the most left position.. a couple mm before the end.
that in HH mode and with 20% more gain.

in non HH mode it spins as expected clockwise,because it has too much right-pitch....

although i got it to fly just like before,
it seems my gyro is messed up. (or I'm still missing something)

I'm very disappointed with the 2100T.
i had 401's abused for years,and never something like that happened.
not even the crashes i had with this gyro justify a malfunction like this.....
3 mild rotor hits on the ground,with only bend blade grip screws.... :mad:

[rotorhead58d]

i hope mine doesn't follow suit. thanks for the info

[crabfu]

t-driver... I have two 2100t's in 2 gaui's and love them. I've tried a 401 in the gaui and actually liked the 2100t better :) Something that is a bit confusing is that you said your slider almost touches the end... ? With my rigs, in rate mode for mechanical setup, the slider is in the middle position, maybe slightly closer to the blades side, and the tail blades look like they are in the typical angle in a heli. I'm not getting how you're getting the slider so far in one end..... Compared to the 401, 2100t is more difficult to setup, because mechanical setup in rate mode is rather critical for the tail to hold. But it is more flexible that you can set the travel is both directions independently. Maybe if you show some pics would help?

So just to make sure we are on the same page... mechanical setup... do it in rate mode, change the link length or slide the servo along the boom until you get non drift. This leaves me with slider about middle with slight pitch in the tail blades. If mechanical setup is not done well in rate mode, it will drift or spin in rate mode, and in HH mode there will be a slow drift, just not holding well. And if you use rudder trim, it's not going to help. After rate it setup so it doesn't drift, then you can set the travel in both directions, then switch to HH and leave it there forever :)

-Crabfu

[t-driver]

t-driver... I have two 2100t's in 2 gaui's and love them. I've tried a 401 in the gaui and actually liked the 2100t better :) Something that is a bit confusing is that you said your slider almost touches the end... ? With my rigs, in rate mode for mechanical setup, the slider is in the middle position, maybe slightly closer to the blades side, and the tail blades look like they are in the typical angle in a heli. ......
.......
.......
And if you use rudder trim, it's not going to help. After rate it setup so it doesn't drift, then you can set the travel in both directions, then switch to HH and leave it there forever :)

-Crabfu

if i setup rate mode mechanically correct, it will drift to the left in HH mode.
but setting it up in HH mode,like i wrote with a lot of right-pitch,
yes, it messes up rate mode,but it flies drift less,just like it should in HH.

i have no rudder trim input

i know the correct setup procedure and i did it the first time in 5 minutes when i first installed the gyro in the gaui. (after watching that video)

this time it took 2 days until i could figure out what the problem was. it need to much pitch in HH mode for some reason.

another thing i noticed since the drift started was, i couldn't get the tail to wag by higher the gain. normally i had a wag at 45% (flying at 43) now at 70%.
also, after a piro,it had a small wag before it stopped.(when everything was in order)
now it doesn't do that anymore.

there must be something wrong...... i think the gyro is toast,but at least i can fly it,even with this "exotic" setup.....or else...

[crabfu]

OK yeah gotcha... I figured you knew what you were doing :) just got confused on a few things that you said, but I think I'm with ya now.

My gyro endpoint for the 2100t is at 55, 70 does seem a bit high. I had a drift problem once in the gaui with both the 401 and 2100t, couldn't track it down so I tried both gyros. It turned out to be issues with a slightly bent feathering spindle in the head (was not noticeable to the eye, but had to replace it anyway), and the tail cf plates with the bearing getting loose. Basically there was too much vibration, and then on top of that the tail was having issues. Neither problem was very noticeable, but vibration was... and took me a few days to track down. This is probably not your problem but just throwing it out there... there isn't excessive vibration is there?

Anyway, I'm at a lost of what it could be, or how it's working now, but at least you can fly :)

-Crabfu

[t-driver]

yea,my only consolation is it flies as it should.
but i haven't give up yet.

i don't have vibrations,at least i don't think so.(don't see any)
but i will change the spindle and the grip screws just to be sure.

how can a bent feathering spindle drift the heli?
due to vibration? that's the only i can think of.

how does mine work now beats me too.
but to describe it in short,it seems that the mechanical "zero point" (where the tail doesn't drift)
in HH mode (only) has shifted itself to the left.
which now needs a big amount of right mechanical correction to get it stable.
or think of it, it always sees a couple of left trim clicks. (in HH only)

[crabfu]

Yeah my particular case was vibration... if I recall correctly, it was throwing off the gyro, and would wag and drift in hh. But the vibration was noticeable visually and also you can hear it, so I don't think it's your issue, what your issue is I have no idea.... if it works in rate mode, hh should hold solid.

Keep us posted if you ever track this one down :)
-Crabfu