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Mar 21, 2018, 08:35 AM
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Dialing in Spoileron Elevator in flight with iX12

Dialing in Spoileron Elevator in flight with iX12

This is a method to adjust the elevator in flight when spoilerons are engaged, usually to obtain a level flight path.

Spoilerons - Ailerons go up(plane drops), elevators go up(raises plane back up)

Turn your plane and iX12 on. This assumes your control surface trims are already be set to neutral. Note here the Elevator is trimmed for level flight at -7.

Go to the Model Adjust-> Flap System screen

Pick a switch to activate the Spoilerons
Leave values for Position 0: both at zero. (Spoilerons off)
For Position 1, enter a negative value so the ailerons go up. I used -25% for this example. A greater negative number will increase the stopping power. But remember too much could cause a tip stall from going too slow.
Put approximately 1/2 of the Flap setting in Elev for Position 1. It's just a starting point. Scroll to the bottom and enter a value for speed(not shown). I used .20s

Go to Model Adjust-> Mixing and create a mix as follows:

P-Mix 1 RT>ELE : Switch D, Rate -100,-100,0% offset
Pushing the R Trim switch will move the elevator with this mix active. And will only be active with the spoilerons on.

Fly your plane and activate the spoilerons at a safe height. Adjust the R Trim elevator so that the plane flies level. Turn the spoilerons off. Fly to a landing approach and turn the spoilerons on and land the plane.

Now you want to transfer the -48 R Trim(spoilerons on) setting to the Elev field in the Flap screen.

Turn the Spoilerons on.
Go to the Model Adjust-> Flap System screen
Record the small value on the left for the ELE. Here it is -48.
Now remove the R Trim you dialed in. Adjust the R Trim switch so that the elevator is back to level(back to -7 in this example). You'll hear a center tone when you're there.

Now adjust the value in Pos 1: Elev until the ELE on the left is equal to the value recorded earlier(-48) in this case).

Go back to the mix section and disable the RT->ELE Mix.
Now turning the spoilerons on will result in level flight.
You may want the plane to drop some with Spoilerons on so just dial that in flight. All this applies to Flaperons also. Just the aileron and elevator settings are different.

These numbers I used are fictitious and not from a flying plane. It's that time of year in the North East. A giant no fly snow zone. That's it.
Last edited by oldsneakers; May 22, 2018 at 03:45 AM.
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Mar 21, 2018, 11:18 AM
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MartinT's Avatar
Well written, good how to, thank you!

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