tail direction

[lovehandles57]

hey guys i am hovering very well and its comming along but, the tail wants to always go to the right with then i have to correct it every time i get the raptor in the air. i have tried using the trim setting below the sticks but it still does the same t5hing. i have no idea how to adjust it. my controller is a JRxp 8103 and i have a raptor 30 v1 can please help

[swatson144]

What gyro? What gain settings?

Steve

[lovehandles57]

its a jr gyro unknown what gain setting

[Fireant]

Sounds like your mechanical rudder trim is not correct.

I'm not familiar with JR systems, but with any gyro/rudder setup, you need to get the mechanical trim done first. Typically, with the rudder stick at neutral, you should have approximately 8 degrees right rudder on the tail blades. (for a normal right hand rotation helicopter). The rudder trim is then fine tuned by hovering the model into wind with the gyro set to normal rate.

The XP8103 has manual and auto selection and I suspect these are normal rate and heading hold respectively. Therefore you should start in manual when checking the mechanical trim. There are two rate settings and these are for the gyro sensitivity. I would have assumed rate 0 was for normal and rate 1 for HH, but without actually playing with the radio, I cannot be sure of this.

[swatson144]

Anthony Is absolutely right on with my first suspicion. Then it occurred to me that you could also be in rate mode vice HH with no REVO mix the JR gyro will swing with pitch changes. BTW so will futaba and most non CSM gyros. This will be pretty generic as you didn't give the model of the gyro and JR has been making them in many models over many years.

I'd think you need to delve into the TX and see what chan and switch is running the gain for the gyro. It's normally gear chan on JR but can be aux if desired. Before making ANY changes be sure to copy your current setup to a new model so you can go back to what you have. Look in the gyro manual and see what kind of indication is expected for HH (there is normally an LED to indicate the mode). Power up the electronics and see if you get an HH mode indication. If not figure out which switch position gets one and see if the % in HH makes sense compared to the rate mode %

Typically you'll begin with 25% on a switch position for rate and 75% for HH (<50% = rate mode and >50%=HH), and the tail pitch as Ant says ~8 degrees. If it hunts turn it down. *in your case you already have a setting that is OK so if it is in rate mode say 28% you'd want ~ 78% in HH (28% + 50% =78%) In rate mode you want to adjust the linkage so that you don't have to hold any constant rudder stick to keep the nose up wind. Once that is set you power down and reinit in HH. After adjusting the gain up slowly (in small increments) until it starts to wag. Then drop down ~5% and you should have a great flying tail.

As a warning I'm guessing you didn't set the heli up? It's not uncommon for people to set a newby up to hover with only one mode on the tail so look it over carefully and understand it before flicking switches in flight. I don't want you switching to a mode with no gyro.

Steve

[lovehandles57]

hey guys thansk so much for helping
actualy i bought it on ebay so i didnt set it up, but i will try what u said

[lovehandles57]

actual i am not quite sure i know what u mean
here's what my screen says when i move it over to (GYRO SENS)

auto

Rate:
0: 0%
1: 50%

[lovehandles57]

then i moved it over to INH wich was what i had it on last time

[swatson144]

INH means inhibited (turned off) you don't want that.

I still don't know what model JR gyro you have but sending it 0% and 50% signal is the minimum gain for either mode.

I have no idea what auto means, so you may want to check the manual on the tx for that.

I don't really see how the gyro is working on those settings. Have you looked at the signal wire plug and seen which chan it is plugged in? Could be gear or aux if aux the gyro sens is meaningless.

Steve

[Fireant]

Steve

I think auto is HH. You're right about the rates settings. I'd start both 0 & 1 at 55% and slowly increase the value until I got tail wag. Of course, this is after setting the mechanical trim.

[lovehandles57]

swatson144-the gyro that i have is a jr pizeo gyro g410T

[swatson144]

OK I have had one of those and it is an older and stranger beasty (perfectly fine though). Since it is from the day of transmitters with many chans were cost prohibitive it has the capacity to not use any extra TX chan. So it r doesn't have remote gain. It won't matter what you change in the radio nothing will change on the gyro. This would explain how the gyro was working with your gain settings of "pretty much off" That'd be one of the reasons I asked "which chan is the gain wire plugged in?" Now that I think about it I think I had a slightly newer model with both remote OR manual gain.

the manual is here (http://www.model-helicopters.com/manuals/JR410T.pdf)

You'll simply need to go through the setup as outlined and you should be fine.

If you need any help let me know, but please give some details as to the problem.

Steve

[lovehandles57]

ok kool thanks alot to everyone who helped