Lost the tail!!!!

[wael]

Third time i lose my tail on the velocity 90. WHY?????? Before i moved to outrage, i never faced such issues with TREX''s. Outrage heli's are a blast,however 3 exact issues in no time is starting to get on my nerves.

Any suggestions??

Wael

[cboo]

tail servo slipping on tail boon.

[wael]

Originally Posted by cboo

tail servo slipping on tail boon.

What do you mean tail servo slipping on tail boom??

[Ozz58]

Originally Posted by wael

What do you mean tail servo slipping on tail boom??

I think he is looking for what caused the "Lost the tail". Your first post did explain what went wrong.

It would help if you would tell us what happened or what broke.

Craig

[BaconRaygun]

Can you be more specific? Did a gear strip? Did you just loose tail control? Did something snap? Or did you literally lose the entire tail boom???

You know, if a specific problem keeps happening to me over and over I usually try to look at other possibilities as to the ‘why’, like maybe something I was doing wrong. From my experience, most of the time this was the case. I have blown my share of ESC’s and destroyed many gears and motors due to dumb mistakes I made over the years (I learned a lot from my RC car days)… but this may not be the case here…. Which is where being more specific comes in.

[Ah Clem]

"You know, if a specific problem keeps happening to me over and over I usually try to look at other possibilities as to the ‘why’, like maybe something I was doing wrong. From my experience, most of the time this was the case."

Vicovaludemero,

You are a wise individual-most people don't do this.

[wael]

Originally Posted by Vicovaludemero

Can you be more specific? Did a gear strip? Did you just loose tail control? Did something snap? Or did you literally lose the entire tail boom???

You know, if a specific problem keeps happening to me over and over I usually try to look at other possibilities as to the ‘why’, like maybe something I was doing wrong. From my experience, most of the time this was the case. I have blown my share of ESC’s and destroyed many gears and motors due to dumb mistakes I made over the years (I learned a lot from my RC car days)… but this may not be the case here…. Which is where being more specific comes in.

I was in a hover position when the tail started spinning. Gears were not striped when checked.

[Inverse]

So what caused it to start spinning?

[im4711]

I am puzzled about the description what happened.
So TT gear all fine and heli starts spinning in hover.
First thought would be that possibly it is an assembly issue where the tail boom and/or tail case is not fully pushed in and the TT might slip out of the gear. Loosen all screws and check if it really is pushed all the way in.
If it is all the way in and running a FB version try out another gyro. In case of a FBL version you may want to check settings o FBl system and try another unit there too. Makes sure the gain is setup right.

[wael]

Originally Posted by Inverse

So what caused it to start spinning?

I don't know!!

[wael]

[QUOTE=im4711;3451546]I am puzzled about the description what happened.
So TT gear all fine and heli starts spinning in hover.
First thought would be that possibly it is an assembly issue where the tail boom and/or tail case is not fully pushed in and the TT might slip out of the gear. Loosen all screws and check if it really is pushed all the way in.
If it is all the way in and running a FB version try out another gyro. In case of a FBL version you may want to check settings o FBl system and try another unit there too. Makes sure the gain is setup right.[/QUOTE

Its impossible for the boom to slip out since i have inserted an additional screw in to the frame and into boom for extra support. In addition i mark a line on the boom of all my helis to make sure that there is no play in which i always check before every flight. What about the GYRO?? What the reason for trying another one?

[BaconRaygun]

So you do not see anything mechanical that got loose? Maybe the screw on the servo horn is loose allowing the horn to slip in its spline?

How about binding? Could be a binding issue where the servo eventually overheats, causing it to perform normally at first, then fail.

[im4711]

Well if the is no mechanical issue it only could be related to the electronics since if all gear sets are in good shape and the heli really starts spinning while you hover it does seem to get some wrong input. Check the wires for gyro or FBL system (depending on what you have).
If one of the signal wires insulation is damaged you might get a faulty signal.
Also I suggest in order to avoid lots of guessing what might be wrong to get some pictures that show the setup and actually a video sequence about what happens.
E.a is it simply some kicking out of the tail while in the wind or is the tail shaking violently or does the heli start doing piruetting all by itself .... It really is not much information other than you told us all is in good mechanical order. So maybe you can provide some more detailed infomration or ideal a video sequence to show what the heli does. That way it would be easier to help.

[eric cartman]

Check the spline gears on the TT. Some of the early models had very small grub screws that were notorious for backing out, even with some red loc-tite love. If the gears are fine and the servo isn't dead, I'd put my money on that. I always ran a bit of shrink tube over the mushroom head screws after loc-tite. Now the new design with a lock nut and full through bolt is pretty bullet proof.

[Fabien]

Hi,

maybe, just check your tail servo wires, inside the servo casing, it can happen that the wires solders get weak and this causes, with vibrations, the servo to stop responding sometimes for a small moment, sometimes till crash, and servo starts to work again when checking so it's very hard to find the problem..

If the tail starts to spin, if it is counter clockwise ( on a clockwise direction main rotor), it's more likely a mechanical failure on gears / shafts in 70% of the cases, electronics beeing involved later. If it is clockwise, it will be more likely an electronic problem ( servo going to end point or something giving pitch to the tail).

Best regards,
Fabien

[saeed09]

Probably you had the torque tube screws off or the torque tube was snaped...or maybe you had the boom not completly inserted in the boom holder..

[memheli]

shake the heli and see if you hear something rattling around in the tail boom, like set screws for the torque tube.

[wael]

The small Screw that holds the tail gear on to the spindle cracked and led the tail to spin.

[memheli]

glad you got it figured out.