Using an FrSky X18 + TD-S6R for Submarine Control

[He Who Shall Not Be Named]

Until Jitter Bug starts making RC radios, I feel it's my duty to help out where I can!

What you're passing on to Jake is now being translated to Torpedo-speak, at which point he'll prepare carefully worded flash-cards for me to use as I work to make my r/c system much smart. Thanks for the work you're putting into this, Steve.

[Fishb0y]

This. Means. War! OK. Gloves off. Gotta find your Achilles-heel, pal!

Until Jitter Bug starts making RC radios, I feel it's my duty to help out where I can!

[He Who Shall Not Be Named]

This. Means. War! OK. Gloves off. Gotta find your Achilles-heel, pal!

[Fishb0y]

This is the process I followed to move the stern planes to the slider and the bow planes to the right stick. I’ve also included a link to a my stabilized model file you can upload directly to your radio… though the real question is: is it truly a model, or just a bootleg copy of Midnight Movie Massacre (1988)?

Step 1. Understand How the S6R Stabilization Works

• The S6R expects one stabilized elevator channel (normally CH2) from the transmitter.
• Stabilization is applied on the channel level (not on the stick), so whatever source drives CH2 will get stabilization applied.
• Therefore, we just need to map CH2 → Slider (S1) instead of J2 (stick).

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Step 2. Reassign Elevator to Slider

1. On the X18, go to Model → Mixer.
2. Find CH2 (Elevator).
3. Delete the default elevator mix line (linked to J2).
4. Add a new line on CH2:
   • Source → move the right slider (S1).
   • Save.
   • Now CH2 is driven only by the slider.
5. Run the Stabilization Wizard again if needed — it will bind stabilization to whatever is on CH2 (now S1).

✅ At this point, the stern planes (CH2) are stabilized and follow the slider.

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Step 3. Set Up Bow Planes on Stick

1. Pick a free channel for bow planes (say CH6).
2. In Mixer, add a new line:
   • Channel: CH6.
   • Source = Elevator Stick (J2).
   • Weight = 100%.
   • Save.
3. Plug your bow plane servo into CH6 on the S6R.

✅ The bow planes now follow the stick directly, with no stabilization applied.

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Step 4. Verify on the Bench

• Move the slider (S1) → stern planes move (and wiggle with stabilization).
• Move the right stick (J2) → bow planes move only.
• Stabilization should only act on stern planes (CH2).