ACM/APM Futaba T8FG (Super) Mode configuration for all 6 modes

The APM WIKI has a good page to describe the setup of the Radio for switching the Mode with the RC toggle switches.

However, there was no help on how to setup the T8FG. It's not rocket science, but took a bit of try and error to set it up.

I thought I document this here so it can be linked into the WIKI along with the other Radio guides for the benefit of my own short term memory deficiencies as well as to make this easier for anybody else with the same radio.


Here a quick guide for that Radio to save yourself the time to play around with something more exciting:

We will use two toggle switches. In my case I used "SE" as the main switch which also controls the radio channel 5.

This switch has three positions. To be able to select 6 positions we need a second switch. I used "SF", which is a two position toggle. so 3 x 2 will allow you to set all 6 modes.


  1. To get the right min/max PWM output we first need to set the Endpoint of channel 5 "SE":
    Linkage Menu (LNK) > END POINT > Move to Channel 5 and adjust to have a low of 67 and 72 for your channel.
    Your display will show: "5 AUX1 135 67 72 135"
  2. To be able to add in the second switch "SF" we need to add a Program Mix which will influence the first channel "SE".
    Model menu (MDL) > PROG. MIX > Choose any, I choose 1 as it was empty.
    On the first page change the x and y Offsets (OFFS) to +25 each.
    Continue scrolling to the second page and set ACT to ON. In the next field, set your second switch. "SF" in my case.
    Set the "MASTER" to SF and the "SLAVE" to "AUX1" or whatever your Channel 5 is called (Default of the radio would be "GEAR"). You can ignore the LINK setting which should not be selectable anyway.
    So the whole page reads:
    #1   ACT OFF   SF
    SLAVE     AUX  OFF


That's it!You now can control all 6 modes with your T8FG.


You can test the settings in the ACM/APM setup and test menu:

In CLI Mode: setup > modes


Flight modes
Pos 1: RTL
Pos 3: AUTO






Views: 41226

Comment by james sowell on August 22, 2012 at 4:04am

mine works with slave as gear not aux and thanks again oliver

Comment by Josh Potter on September 4, 2012 at 4:25pm

Very helpful, thanks!

Comment by Marco Robustini on November 23, 2012 at 5:08am

Hi Oliver, all is clear, but you have to consider the internal APM failsafe: if the rx stop to work ArduPPM automatically switches the flight mode to the number "4", then it is highly recommended to put on this flight mode the "RTL" (with autoapproach or autolanding enabled).
This of course applies not only to T8FG but for any tx.

Bests, Marco

Comment by Marco Robustini on December 7, 2012 at 8:45am

Hi all, i've found a good combination for the T8FG with the "flight mode 4" to "RTL (right for the "failsafe function"), just follow this step:

- go to "LINKAGE MENU"

- go to "FUNCTION" and in the channel 5 assign "AUX1" and select "SE" switch for this function

- exit and go to "END POINT"

- in the channel 5 called "AUX1" set the sx end point to "50" and the right to "30", your display will show: "5 AUX1 135 50 30 135"

- exit an go to "SUB-TRIM", set "AUX1" to "-170" (default is "0")

- go to "MODEL MENU"

- go to "PROG. MIX"

- enter in the first program mix, go to the second page and enable the mix from "INH" to "ACT, select "SF" switch instead of "--", set MASTER and SLAVE to "AUX1 (all the rest to default)

- go to the first page and select "POINT" instead of "LINEAR" and set this value: 1/2/3 at "-100", 4/5 at -50

- exit and go to the second program mix, in the second page enable the mix from "INH" to "ACT", select "SF" switch instead of "--", set MASTER and SLAVE to "AUX1 (all the rest to default), in the first page set the second value (starting from the top) to "+100" and "Y" to "-100"
, leave the other two to "0"

In the planner set this flight mode (respect the order) and use SE and SF switch for change the mode:

Flight Mode 1: STABILIZE
Flight Mode 2: ACRO
Flight Mode 3: LOITER
Flight Mode 4: RTL
Flight Mode 5: ALT_HOLD
Flight Mode 6: AUTO

Please verify the right pwm value, there must be a good margin (at least 20).

Bests, Marco

Comment by Marco Robustini on December 17, 2012 at 4:37am

I'm sorry Veikko, i haven't tested the "joystick controlling" feature.

Comment by Tissy on December 18, 2012 at 3:25pm
Thanks for the write up Marco, I've now set up my T8FG to the same configuration.
Comment by ziggy95 on February 5, 2013 at 2:21am


How to program simple mode in a different switch ?

Comment by Michael R. Podlogar on June 16, 2013 at 3:48am

Hi, is this working with the T8J as well? 

Comment by Arunabha Bhattacharya on June 20, 2013 at 6:24am

Can someone explain the theory behind this mixing? And also how I could go about doing it on the 8J?

Comment by Ground Loop on September 2, 2013 at 9:55pm

I wasn't able to replicate the six modes using exactly these values, but took the excellent idea and ran with it.

Arunabha, if I understood correctly, the basic idea is to use your three-position switch SE to select modes 2, 4, and 6.  In my case, switch SF then 'mixes in' a subtractive offset, engaging modes 1, 3, and 5.  So you set up the programmable mix to add an offset/bias in when the P.Mix mode is ON.  To accomplish this, I also had to change the endpoint mapping to push the top/bottom end around, just as described.

You want to watch the Channel5 PWM value carefully as you do this, and ensure that you are hitting all six modes, and also that the PWM value for each falls comfortably in the range shown in Mission planner.. you don't want one switch setting to be on the edge, or ambiguous.  I can tell you my values, but maybe yours too need to be different:

END POINT for AUX5 135 67   54 135

Leave the 135 values alone, and adjust the other two for the high/low flight mode to be comfortably in the range.


I'm using -50 for both X and Y Linear offsets.

With these settings, I can easily place the PWM value in all six modes, and then configure them as needed.  I'm not clear on the problems with the Failsafe interaction, which other posts indicate might be something to do with a specific (non-Futaba) receiver.  In my case, the Throttle failsafe seems to work fine, and the flight mode is not changed.

My thanks to Oliver for the excellent idea -- I really like having all six modes available from switches.


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