jr xp 6102 computer radio

[slowflyerhehehe]

I have a new jr xp 6102 radio and never messed with them before and would like to know of anywere that there may be info how how to use the radio and not by just reading the manul the manul is only good if you understand what to do i doint.i have figgerd out how to set up the throttle rudder elevator rons and trims but what else needs to be done or setup for a standard plane
1 wing servo
1 throttle servo
1 rudder servo
1 elevator servo

[ctdahle]

On a sport airplane, there is not much you need to change. But on any airplane, begin with the radio and the plane set up as if you have an oldfashioned radio with NO computer before you start programming anything.

Do the best you can to set up your linkages mechanically so that you are very close to the designer's specifications on throw and direction WITHOUT using the computer. Similarly, all of your neutrals should be set mechanically without making any adjustments on the computer. Save these settings as your base model set up, then copy the settings to another memory location so that you can begin to experiment. You want to be able to switch back and forth from the basic set up to your experimental settings to see if your changes really improve the way the plane flies, or make it harder to fly.

Thus, for example, my radio has "4*401" which is the basic setup for my Four Star.

With the basic set up in place, go fly. Again, tweak and trim the plane mechanically until it is as close to perfect as you can make it without the computer.

ADDING EXPO

Now you can start to tweak the radio. One thing I like to add is EXPO to the main flight surfaces. EXPO (exponential control) changes the sensitivity of the controls such that around neutral, the controls are less harsh, but as you move the stick further from neutral, the controls become more responsive. This allows you to make tiny corrections in your flight path at low speeds without over controlling. To experiment with EXPO, First try about 30% on your rudder, and then do some taxiing. You will note that a small movement of the stick will barely interrupt the straight roll down the runway, but when you move the stick a large distance, the plane will turn very quickly. This is helpful after touchdown when you need to keep the plane on the runway, but don't want to turn abruptly until speed has bled off.

You can add EXPO to your other controls too to make the plane "soft" around neutral and more responsive at the extremes.

When you are done fiddling with this, consider saving the set ups to a second model memory before you make the next set of changes.

RATES AND MIXES

RATES simply means setting switches to increase the total amount of control available. This allows you to hot dog a bit. Note however that the practical limit is about 45degrees of control throw. Beyond 45 degrees, the control surfaces act like big anchors. You change RATES while you are flying, switching to high rates to show boat, then switching back to low rates for landing.

MIXES

You use mixes to correct idiosyncracies in the airplane. For example, my Cutie has a tendency to roll off to the left because it has no right thrust built in, so I have mixed throttle to rudder, so that as I increase the throttle setting, the rudder moves slightly to the right and the plane tracks straight as power is increased. You could do the same with elevator if you have a plane that tends to balloon when you goose it, mix throttle to elevator so that additions of power also automagically add a bit of down elevator.

On the three channel Cutie, I've also mixed aileron to rudder so that I can fly the plane with the right hand stick as if it had ailerons, but still steer on the ground with the left stick as if it had four channel control.

Hope that helps.

[Junior]

CT...

Thanks for that little tidbit on radio set up...

While I'm sure some of this is old info for some of the "old timers..." but it's good info for the like of me....

good simple explinations...

Good on ya

Junior

[ctdahle]

Thanks Junior,

Another point:

When you decide you are ready to dial up the control rates so you can hot dog the airplane, adjust the linkages to increase the throws.

Do this by, for example, moving the pushrod end/clevis/link to an outboard hole on the servo arm, or a more inner hole on the control surface horn.

Then set up your rate switches so that High Rate is 100% (OK you can go to 110%, I don't mind) of normal full servo throw, and low rate is maybe 70 or 80% of full throw.

It is true that you can dial up the servo throw to 150% on some radios, but by doing so, you are pushing your servos to their limits. Some people can afford to buy new servos for every airplane, but school teachers have to make them last as long as possible.