3gx tail gain

[stargazer]

Hi

I am going to check the pitch on my tail blades are correct by using rate mode on the 3gx,I know 0 to 50 is rate mode then 50 to 100 is heading hold and as you increase the % towards 100 you get more gain in heading hold,but which way increases the gain in rate mode?When I first maidened the heli I tryed to set tail up in rate mode with about 40 set in the transmitter and the tail just whiped round side to side which was unnerving.Heli is trex 550dfc and radio Futaba 14 sg.

Cheers Dave.

[tourerjim]

Are you using sats or rx.?

[stargazer]

Rx mate.

[tourerjim]

When you flick the gain switch does the 3gx led light go from green HH to red rate mod.
Im not sure with futaba but you need to lower gais in HH but the other thing worth checking is the servo horn you need the link in as far as poss but still getting full tail slider travel.

[coolice]

Hi Dave.

From memory you can change the behaviour of the Futaba tail gain channel to work better with other makers gyros, I can't remember fully but I think if you set the channel to operate in AVCS for heading hold and normal for rate mode, it makes the channel behave properly meaning 0 ~ 100% travel adjustment equals 0 ~ 100% gain in each mode.
Also lower values in the rate mode side off the top of my head equalled higher gain values in rate mode. I'm a JR flier so having to remember setups I did with Futaba gear.

However as a visual check you can monitor the actual tail gyro gain by connecting the 3GX to your PC and observing the "Settings Display" tab as this will show live rudder gain values and so help you get your bearings as to what values within your transmitter equate to on the model.

The status led on the 3GX itself will denote if the 3GX is in heading hold mode (green led) or rate mode (red led).
Another way to check the effect of gain changes is to move the models tail from side to side as you adjust the gyro gain values, you'll see and feel the tail servo slow down or speed up with it's corrective commands as you change the gain percentages.
.

[AndyThilo]

Hi

The 14SG can be a little confusing to set up tail gains. Here is how to do it.

1. Pick a switch, personally I use SD which is the small 3 position on the right, #1 is switch up, #2 middle and #3 switch down.
2. Go into the Gyro menu. Make sure type is set to SW and not Condition
3. Select #1 and choose SD as the switch. When you select SD, goto ON/OFF and make sure it's ON, OFF, OFF (on being the top one).
4. Make sure Type is set to GY, and it says NORM (this is rate mode).
5. Choose a percentage, mine is set to 50%.

Now to set HH mode.

1. Select #2. Go back to ON/OFF (tap on SD and select ON/OFF again) and make sure it's OFF, ON, OFF (on being the top one).
4. Make sure Type is set to GY, and it says AVCS (this is HH mode).
5. Choose a percentage. Start low, say at 30%.

Now do the same for #3 but change the switch menu to OFF/OFF/ON. I use the same percentage for both Rate and AVCS but you can choose different ones if you wish.

So to summarise on the switch positions:

#1 #2 #3
ON OFF OFF
OFF ON OFF
OFF OFF ON

To confirm it's all working as it should, goto Linkage menu and then servo, and look at CH5. In Rate mode it should be up, mine is -59, and in HH mode it should go down mine says +47 @ 40%.

Hope that all makes sense, any questions just ask

Cheers

Andy

[stargazer]

Thanks for all the advice,I will give it a go when I get the time.I avoided useing the Gy mode in the transmitter as the manual says only use it with futaba gyros but now I know better.

Cheers Dave.