JR 10sx2 Programming Tips
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Home > Articles & Tips Index > Radio Systems > JR 10sx2 Programming Tips

[Courtesy of Michael Lachowski [mikel "at" eclipse.net], May 1999 - Copyright 1998 Michael Lachowski]

Here are my notes on the 10SX2. The 10X should be very similar. The 10SX or 10S requires a little more creativity at times. You might want to set up one base template and save it with your Datasafe. Then whenever you get a new model, read in the template with the Datasafe and tune your travels and you are done.

Programming the JR 10SX II for 6 Channel Sailplanes

by: Michael Lachowski 1998

Part I - Basic Mixing.

1) Set up the wing and tail using Code 22. The wing should be Quad Flaps and the tail can be regular or V-Tail.

2) Disable most of the switches for now. Code 17. Inhibit GEAR, FLAP, AUX2, AUX3, AUX4, AUX5. Disable the Trimmer functions.

3) Set the Flap and Gear channels to +110 and -110 with Code 15.

4) Check your servo directions and set them with Code 11.

Now it’s time to start programming the assorted mixes and travels. For switches functions, Flap Switch down - Launch mode mid - Camber preset up - Normal flight

AUX2 Switch (optional) down - camber preset 1 (thermal) up - camber preset 2 (reflex)

5) Program your aileron to rudder mix with Code 62, A-R Mix. For now, use Position 0 for normal mixing.

6) Program your flap presets using Code 66. Use the LAND position for launching and the MID position for a thermal setting. Note that you can also use the elevator preset on launch if you need to compensate for the towhook position.

Next comes the full span camber and landing mixing. To do this, apply a little programming creativity. Use a programmable multi-point mix (Code 56). What you want to achieve is moving the flaps and ailerons in sync around the neutral position for camber settings. When the flap moves further down to the launch position, you want the ailerons to continue downward to your desired launch settings. Some models will work best with the ailerons matching the flaps in travel while other models will require less aileron travel than flap travel. You need one mix point half way between the camber range and the launch range and a second mix point at the launch flap setting. Finally, if you want crow, set the mix point at full travel to raise the ailerons back up. If you land with just a slight aileron droop for slow flight, then set the full travel position to move the ailerons back up to this point.

You also need to set the aileron up travel. This should be done carefully, reducing the maximum position travel so that the ailerons will match the flap up travel. Adjust this setting without the airplane turned on to prevent any servo damage.

You will want to turn on the FLAP lever with Code 17 to do the initial setup.

7) Mix in the Flap channel to Gear (->FLAP->GEAR) with Code 56. Select a multi-point mix and also turn on include mixing. Set a mix point with the flaps slightly down and adjust so that the ailerons are down an equal amount. Set another mix point with the flaps up and adjust so that the ailerons go up an equal amount. Now you should have full span camber with the ailerons and flaps moving together. This only needs to work for 5 degrees up and down travel. Turn off the FLAP lever with Code 17 after you are done.

8) Mix in Throttle to Flap (THRO->FLAP) with Code 51. With the throttle in the full-up position, store the Offset. Now set the POS1 mix value so that the throttle moves the flaps downward.

9) Check your aileron travel when moving the Throttle stick to see if it is OK for landing.

10) Check your aileron travel and flap travel when using the switch for launch and camber settings. You may want to set and adjust another point at the launch setting on Code 56 to optimize the preset on the ailerons during launch.

11) Mix in elevator compensation. For the greatest flexibility, use Code 57 and a mixing curve. The mix should be Throttle to Elevator (THRO->ELEV). The best curve usually starts downward quickly then levels out more as the stick travel increases.

At this point, you should have the basic mixes in place for thermal soaring.

Practical Application - Adjusting Aileron differential on launch

With some models, a more agressive launch setting can be achieved by increasing the droop on the ailerons during launch. One side effect of this may be that any downward aileron movement may result in a tip-stall during launch. This can be prevented by using a programmable mix.

1) Select a standard programmable mix (Code 55). Mix the aileron channel into gear. (AILE->GEAR)

2) For position 0, the mix values should be 0.

3) On the Switch Selection, set L-D to POS-1.

4) Now adjust the POS-1 mix so that the ailerons do not move down, only up. Check both directions.

Practical Application - Additional Camber Presets

Code 52, #AUX2->FLAP

Set + and - positions for camber and reflex settings as desired. Use the AXU position for reflex if you use some of the other mixes that follow.

Practical Application - Mixing aileron into the flaps

Mixing the ailerons into the flaps can improve roll performance. Use a mixer for this purpose.

Code 53 AILE->AUX2

Practical Application - Adjusting differential and rudder mix for speed and aerobatics

There is no ideal aileron to rudder mixing for every flight condition. Typically you will set up the mix for normal flight and thermal soaring. If you are flying F3b speed or slope flying, you will wand to greatly reduce the aileron to rudder mixing. You can set this flight mode using a switch.

Code 22, Set a POS1 switch (AXU) Set a lower differential.

Code 62 AILE->RUDD MIX. Set a POS1 switch (AXU) Set a low mix value for POS1, typically 4-8%.

Adjust your differential and rudder mix be flying away from you fast and alternately rolling left and right. Minimize any yaw with the mixes.

Practical Application - Adding more rudder mix on launch

It may be desirable to have additional aileron to rudder mixing on launch. This is helpful if you don’t always remember to use the rudder stick to correct the flight path during the launch.

Code 54 AILE->RUDD

Pos0: 0

Pos1: +20, +20

Set Pos1 for the LAND (Launch) switch position.

Practical Application Snap-Flaps

Mixing elevator into flaps is desirable for fast turns. The built-in Code 63 elevator to flap mix could be used, but it is less than ideal. You might not want the flap movement near the elevator neutral position and you also want to limit the total flap throw. A mixing curve provides a better solution.

Use Code 58, mix ELEV->FLAP.

1) Clear the zero point on the mixing curve. You want to do this so you can set another zero point with slight up elevator. If you don’t do this, you won’t be able to set this point.

2) Move the elevator slightly up and set the point.

3) Now move the elevator one third to one half up elevator and set another point. This is the place where you want to set your maximum flap deflection.

4) Set the full up elevator to the same flap deflection.

5) Set the full down elevator position to zero flap deflection.


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