RunRyder - Tail wagging

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Align T-REX 600N 700N > Tail wagging

casper7
Senior Heliman
Location: UK southeast

Hi

--------------------------------------------------------------------------------

I am running a 600N sport with a OS 50 hyper and a CSM gyro and JR8900g tail servo, I have set up the gyro as I have done many times with my EVO 50, but I am unable to stop the tail wag on the 600N.

I have taken out my engine and swapped it with my EVO's engine in case there was a problem there, still wags, I have been up and down the gain, still wags.

I have replaced the servo with another 8900g still wags.

I have swapprd the CSM 420L gyro with the one in my EVO, still wags.

I have upgraded to the metal Align fan, still wags.

I have fitted a Revlock 20, still wags.

I have stripped down everything on the frames to ensure the main shaft is free running it still wags.

Why does the 600N have a tail wag issue, I have searched through this site and HF I see lots of unresolved issues in terms of tail wagging. WHAT CAN IT BE THAT CAUSES THIS. ITS MAKING ME WANT TO GIVE UP ON THE 600N.

09-08-2007 Over year old.

jet78
Heliman
Location: Truly Asia....

Hi casper,

I'm running a similar set like yours using the JR770t gyro
with the 8900g tail servo. I'm not using any type of governer
agt the monent but I too am having the tail waggin problem

my gain on my futaba 9chp is nearly at its lowest setting
of 53% only...the tail is quite steady..but when I get my
head speed to about 2150rpm the tail wags violently.

the instructions specifically states that between 49-51%
of the gyro is prohibited.

I move the lingkage for my servo horn to the lowest hole
when on the ground the servo twitches like crazy...

I have still yet to determind this problem... but I wont
give up till I find out whats going on...

this is the first heli built by me.....
hope you find out soon too

regards

09-08-2007 Over year old.

micknick
Senior Heliman
Location: united kingdom Rainham kent

Tail wag

Hi Casper
I too have had issues with tail wag on my 600n pro have made a few adjustments but as yet have been unable to re test the heli due to work and family comittments, but i have hade a real good response from the guys on here if you check out my posts regarding the issue I am sure you will find some of the info useful.
Wherabouts in the southeast are you from? i'm in Rainham Kent.

09-08-2007 Over year old.

falcon
Key Veteran
Location: Peterborough UK

I have spent the past 8 weeks trying to stop the tail drift on my 600n it was driving me nuts. The other day i decided to fit a Kasama tail hub and blade grips off one of my Raptors.
Problem solved now the tail is locked and no wag or hunting.
Check out the bearings in the grips.

CSM720 JR8700

Trex600E,Trex600N-Pro+ KASAMA SRIMOK Rotor head,Trex450se, R50 Kasamas

09-08-2007 Over year old.

HOMEPAGE

micknick
Senior Heliman
Location: united kingdom Rainham kent

How bad was your wag before you replaced the grips Falcon? I have heard a lot of problems solved by changing the grips, but for some strange reason have not done it myself yet.

09-08-2007 Over year old.

casper7
Senior Heliman
Location: UK southeast

Thanks for the replies, I am going to break down the tail in the morning and see what the bearings are like.

I will keep you posted of my results.

Mike

09-08-2007 Over year old.

falcon
Key Veteran
Location: Peterborough UK

Hi micknick
When in the hover the tail would move left and right a couple of inches very slowly like it was floating. Winding up the gain maid no difference until it started hunting.
It was ok in forward flight and seemed ok backwards through i didn't feel confident in backward flight or flipping it with this problem but now it rips.

Best i have flown in 30 years flying on the sticks except my 600E

Trex600E,Trex600N-Pro+ KASAMA SRIMOK Rotor head,Trex450se, R50 Kasamas

09-08-2007 Over year old.

HOMEPAGE

tchavei
rrProfessor
Location: Portugal

Its hardly a gyro problem when its not solved by lowering the gain.

I had similar issues (tail jerky and jumping around without a defined pattern)and here's what fixed it:

1. second bearing in TT (stopped the jumping around and I only ended with a pure horizontal wag)

2. Basic Tail rotor mod as explained in the electric section (you shave off 0.2mm of the outer thrust bearing so it has some play) and lube everything very well

My tail wag went completely away. This should fix your problem too I guess... there are alot of posts about the thrusted tail rotor problem in the electric section and most solved it like that.

However I still find it a little nervous around hovering compared to my evo so I went for the advanced tail rotor mod (double radial bearings and simple thrust with extended bolts) and zeal gel on the gyro... will report tomorrow.

Tony

--------------------
"Perfection and patience usually walk side by side..."

09-08-2007 Over year old.

HOMEPAGE

MattUK
Senior Heliman
Location: Lancaster, UK

Quote
stop the tail drift

hmmm you got me thinking now, I have put 15 tanks through my 600N and I have been experiencing tail drifting

I've not had any tail wag at all but the drifting has been doing my head in so I sent my Futaba GY611 back for a check - I'm getting the feeling it's a mechanical problem

Matt.

----
Light travels faster than sound. That's why some people appear bright until they speak.

09-08-2007 Over year old.

falcon
Key Veteran
Location: Peterborough UK

MatthewUK sounds like you have the same problem i had

Trex600E,Trex600N-Pro+ KASAMA SRIMOK Rotor head,Trex450se, R50 Kasamas

09-08-2007 Over year old.

HOMEPAGE

MattUK
Senior Heliman
Location: Lancaster, UK

Falcon

Sounds about right, typical I have sent my gyro back to futaba services....2 weeks and not looked at yet and they told me they are busy and it it will be another week at least

and from what it sounds like the gyro is prob ok.

I was thinking to myself...I cannot believe my GY611 is drifting...I mean it just does not happen with a 611.

I think I need to get the quick UK tail hub !

and would you believe the weather at the moment is SPOT ON !!

Matt.

----
Light travels faster than sound. That's why some people appear bright until they speak.

09-08-2007 Over year old.

mickeyapples
Veteran
Location: England

Blade grips are the cause of wags. I have had bad wagging on my pro and sport. fitted Kasama blade grips and the tail holds solid on both helis.

Live life on the edge. Stand next to me when I am flying

09-09-2007 Over year old.

jet78
Heliman
Location: Truly Asia....

hey mickey

does the kasama blade grips for the raptor fit on the trex????

09-09-2007 Over year old.

falcon
Key Veteran
Location: Peterborough UK

Hi jet78
I used the whole Kasama tail that included the hub

Trex600E,Trex600N-Pro+ KASAMA SRIMOK Rotor head,Trex450se, R50 Kasamas

09-09-2007 Over year old.

HOMEPAGE

jet78
Heliman
Location: Truly Asia....

hey falcon,

I'm currently using the metal tail(belt version) too
from align.

09-09-2007 Over year old.

falcon
Key Veteran
Location: Peterborough UK

this is the metal tail belt version on my 600E

Trex600E,Trex600N-Pro+ KASAMA SRIMOK Rotor head,Trex450se, R50 Kasamas

09-09-2007 Over year old.

HOMEPAGE

jet78
Heliman
Location: Truly Asia....

wow dude........

looks really nice.... did you convert the tail servo like the
raptor too? hanging off the boom?

09-09-2007 Over year old.

MrMel
Elite Veteran
Location: Lidingo, Sweden

Same issue has been on T600E since day one.

I used Raptor 50 QuickUK tail hub unit on mine and never looked back, just dont forget the set the limit of the gyro correctly because else the tail might lock up (it can overthrow it)

09-09-2007 Over year old.

falcon
Key Veteran
Location: Peterborough UK

I have over 200 flights on my 600e and i never had a problem absolutly locked.
When flew my 600N I was beginning to think it was the torque tube drive sine the 600E is belt but you live and learn.

Trex600E,Trex600N-Pro+ KASAMA SRIMOK Rotor head,Trex450se, R50 Kasamas

09-09-2007 Over year old.

HOMEPAGE

jet78
Heliman
Location: Truly Asia....

I'm going to throw her around tomorrow in the sky
abit...just fitting in a new OS hyper...

the webra needs to be benched run in... i think
it needs another 2 gallons...

will see how the bird flys with the new engine...
cheers

09-09-2007 Over year old.

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