Twitch In Tail wont go away.

mott · 11-16-2011, 09:46 PM

As above , In head lock , there is an occasional tail twitch in hover. The head is definitely locked in , but seems a bit flighty.. I've gone through all the adjustments with gyro gain on my DX7 ,and also the delay's and limits adj on the futaba 401. the servo is a Futaba s9257.I've been running between 72 & 75 pc gain on the gyro channel on the dx7. The belt seems at the correct tension, but if its a smidgen to tight or loose , could that cause the problem? ....Funny thing is , this is my second Protos , the other ,being the plastic frame , and its running as smooth as ,with the same running gear. Got to the point of tossing it in the back room and forgetting all about the thing. I've been fiddling with this thing for months , when I could be flying my working ones ..

whto · 11-17-2011, 02:21 AM

With the CF frame, may be static with intermittent tail twitch?

mott · 11-17-2011, 02:35 AM

Quote:

Originally Posted by whto

With the CF frame, may be static with intermittent tail twitch?

I'm running the Fusuno Florescent frames , would that still apply ?

clicky · 11-17-2011, 05:22 AM

It could be that one way is slipping! Same/similar thing happened to me and took me a while to find out what was it all about. Tail would twitch at the beginning of flight (probably until motor/motor's shaft get warmer and expand just enough to stop it). Later it would do it more and more and at some HS (while spooling it up) it would just cut off (ESC would lower motor speed to something really low)...

Replacing the one way bearing (motor pinion) fixed it.

kdfi · 11-20-2011, 08:25 PM

I had a side to side twich on my cf Protos.

1st I found I had static problems so I grounded the boom. The side to side went away some but not fully. I then switched to the thrusted tail and all problems went away.

You can start by checking you links and if they are too tight use the provided ball sizing tool to loosen them up. Also your tail servo can be bad. I had a 9257 start going bad on me and made the tail sway side to side. switched it to a BLS251.

Inverse · 11-20-2011, 08:32 PM

Any binding in your tail?
I had to polish my shaft and relieve the tail pitch links onto the hub.
I also resized the links and resized the holes in the forks of the pitch arms.

kdfi · 11-20-2011, 09:18 PM

Yes, in the forks there was some binding. I resized them.

Inverse · 11-20-2011, 09:20 PM

And they have zero binding in them? Resized your balls?

kdfi · 11-20-2011, 09:52 PM

I have zero binding. I used the ball link sizing tool provided with the kit. My tail is locked in and flys flawlessly. I can't do any smack 3d though.

11-16-2011, 09:46 PM	#1
mott Registered Users Join Date: Feb 2009 Location: Tasmania - Australia- Under Downunder	Twitch In Tail wont go away. As above , In head lock , there is an occasional tail twitch in hover. The head is definitely locked in , but seems a bit flighty.. I've gone through all the adjustments with gyro gain on my DX7 ,and also the delay's and limits adj on the futaba 401. the servo is a Futaba s9257.I've been running between 72 & 75 pc gain on the gyro channel on the dx7. The belt seems at the correct tension, but if its a smidgen to tight or loose , could that cause the problem? ....Funny thing is , this is my second Protos , the other ,being the plastic frame , and its running as smooth as ,with the same running gear. Got to the point of tossing it in the back room and forgetting all about the thing. I've been fiddling with this thing for months , when I could be flying my working ones ..

11-17-2011, 02:21 AM	#2
whto Registered Users Join Date: Jan 2008 Location: Fremont, CA, USA	With the CF frame, may be static with intermittent tail twitch? __________________ Gaui X5 FES, Beastx, belt tail Protos 500 FBL, lower head, stretch tail, Beastx AleeS Rush 750 (build in progress)

11-20-2011, 08:32 PM	#6
Inverse Registered Users My HF Map location Join Date: Jan 2010 Location: Western Australia	Any binding in your tail? I had to polish my shaft and relieve the tail pitch links onto the hub. I also resized the links and resized the holes in the forks of the pitch arms. __________________ Compass 3D+ - OS55 Hyper/Hatori/Vbar Prôtos 500 - MSH Brain Tarot 450 Pro - AR7200BX Spektrum DX8

11-20-2011, 09:20 PM	#8
Inverse Registered Users My HF Map location Join Date: Jan 2010 Location: Western Australia	And they have zero binding in them? Resized your balls? __________________ Compass 3D+ - OS55 Hyper/Hatori/Vbar Prôtos 500 - MSH Brain Tarot 450 Pro - AR7200BX Spektrum DX8

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11-17-2011, 05:22 AM	#4
clicky Registered Users Join Date: Dec 2007 Location: Warwickshire, UK	It could be that one way is slipping! Same/similar thing happened to me and took me a while to find out what was it all about. Tail would twitch at the beginning of flight (probably until motor/motor's shaft get warmer and expand just enough to stop it). Later it would do it more and more and at some HS (while spooling it up) it would just cut off (ESC would lower motor speed to something really low)... Replacing the one way bearing (motor pinion) fixed it.

11-20-2011, 08:25 PM	#5
kdfi Registered Users Join Date: Mar 2007 Location: Acampo, Ca	I had a side to side twich on my cf Protos. 1st I found I had static problems so I grounded the boom. The side to side went away some but not fully. I then switched to the thrusted tail and all problems went away. You can start by checking you links and if they are too tight use the provided ball sizing tool to loosen them up. Also your tail servo can be bad. I had a 9257 start going bad on me and made the tail sway side to side. switched it to a BLS251.

11-20-2011, 09:18 PM	#7
kdfi Registered Users Join Date: Mar 2007 Location: Acampo, Ca	Yes, in the forks there was some binding. I resized them.

11-20-2011, 09:52 PM	#9
kdfi Registered Users Join Date: Mar 2007 Location: Acampo, Ca	I have zero binding. I used the ball link sizing tool provided with the kit. My tail is locked in and flys flawlessly. I can't do any smack 3d though.