Left turn madness!

[ShotgunTC88]

Me again guy's

My Dragonus turns left REALLY quick compared to right hand turns as in it WHIPS to the left with not much left stick input!

It turns left quicker than a fixed pitch heli.

Any ideas as to what could be the prob?

Thanks
Shotgun

[Coolice]

Hey matey,

Sounds silly I know but your swashplate linkages/servo horns are equaly on both sides? I'm sure they are but I had to ask incase.

Oooh, hang on a minute I just re-read your post do you mean the the tail rotor (yaw) control?
If so it will rotate quicker left than right due to the torque of the main rotors wanting to rotate the fuselage left. Hence adding left tail rotor will allow the model to rotate in the direction the fuselage wants to go in, eg. in the opposite direction of the main rotors.
.

[ShotgunTC88]

Hey Cool I reall appreciate the help here man, I am stumpted!!!!!

I have checked and checked, EVERTHING I can think of.

I am used to most other helis having a quite quicker left turning rate than right (until you get it setup proper)

In most case's in the past on other helis it was due to to much Pitch at mid stick and lowering pitch and raising throttle at hover solved it.


But my Dragonus turns left before you can blink even with VERY "tender" left rudder input!
I could probably win any piro contest known to man!!!! :lol:

I have checked all links and have perfect 90deg on swash and all head arms/pitch lengths the same and no crosslink/ interaction mixing at low/mid/ or high stick and no binding or stalling anywhere on the head or tail, correct rudder rotation (counterclockwise into propwash) and I tried multiple ATV settings with no luck.

I am running 2 degrees lowstick, Center stick at 0 pitch,
Hover around 4/5degrees pitch at 3/4 stick
and 10degrees highpitch full stick

90 degree angle on all servos including tail
(ONE thing that looks wierd is that the tail pitch as per manual is 0 degrees at mid stick and when I add right tail pitch trim it just drifts the tail right without helping the problem)

Tail pitch control arm on tail 90 degrees too tailboom,

Tail blade carrier centered on tail rotor shaft (0 tail pitch at hover pre manuel, to me it don't make sense....But that's how it say's to run it)
if I add in some right tail pitch to correct it only drifts to the right and stil has the monster left whip!.


Gyro holds perfect when in hover with tiny left/right stick movements it will hover all day long!
(Non heading lock piezo) no wag. perfect gain and centering

Zero binding anywhere, Servos work flawless


Even in a dead hover without pitch change or throttle change if I give about a smooht 1/4 left stick it just whips left like I was attempting a hard stick throw!!!!!...........(nope no binding or bad servo, Done checked :mrgreen: )
Wierd huh? :arggg:

It will turn very sluggish right with right stick movement like there is to much counter tourqe simular to a fixed pitch heli. (like a Corona)

.

On this one Im at 3/4 stick with roughly 5degrees max pitch at 3/4 stick.

The answer is out there and it is probably somthing so dam small when I find it I will cry :oops:

Thanks man, I really got to find this prob or go back to :roll: .....Gassers,(not really)

Billy

[Coolice]

Hey,

No worries for the help, I'm glad to offer assistance.

Erm, I'm of the feeling it's to do with the tail pitch change arm not being quite right. At mid rudder stick the tail should have some right tail command being seen on the blades to counteract the torque. Then as you add more right tail to make a turn your adding to whats already there and the model yaws round.

I'm not entirely sure of this trick on a non heading hold gyro but you can use the ATV of the rudder channel in the Tx to speed up or slow down the piro rate. With the ATV's at 100% max tail travel is normally acheived within 1/4 ~ 1/3rd stick movement, cut the ATV down to 60/70% and you will see the tail follow the stick movement to either side. Try cutting down the ATV value on the rudder and see if that makes the tail a little nicer to fly.
Remembering my setups I normally run about 70% rudder ATV which gives me the tail feel I like.

Max pitch range I have set on my Dragonus is +-12 degrees, with 0 centre stick. This makes for a very lively and responsive collective but the model/motor doesn't mind. Then I cut these down depending on what IdleUp curves I need, eg.

Normal ; -3 ~ 0 ~ +12 degree's
IdelUp1 : -6 ~ 0 ~ +12 degres's
IdelUp2 : -12 ~ 0 ~ +12

Try altering the tail ATV value and setting the tail slider control arm parallel to the tail shaft.
.