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Old 01-12-2003 | 03:10 PM
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John Murdoch
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Default Programming the 8103

This is what Horizon Hobbies has as a side programming guide. I know this isn't the proper forum for posting this but I think it might help the people who are flying or are putting together the Patty using the 8103 Radio.

Programming Guide for the JR 8103 radio system

The following is a programming example for plane using 2 elevator servos, the second servo plugged into aux 2 or channel 7, 2 aileron servos, the second aileron plugged into the aux 1 or channel 6, using spoilerons for harriers and elevators. Keep in mind that any advise is for maximum control surface throw, and should only be used by well-experienced pilots. If you follow along, several features of the 8103 will be demonstrated, which should help better understand the abilities of the system.

System Set-Up Mode

To start with we will open a clear model, so press and hold the up and down keys together and flip the power switch on and then release the up and down keys. Press the + and – keys to go into model select. Press the + key until you get to a clear model. Then press the up key twice to get to the model type. To get to the correct type, press the + key to get to ACRO, if it is not already in ACRO mode. Next you will press the up key to model reset. Press CLR so that it will restore the system to factory defaults. Press the up key to select the modulation of the system. Here you will use the + and – keys to set this to the desired modulation. Press the up key twice, to set the wing type selection. Press the + key to set this to mix wing FLAPERON. Then you can press the up key till you get to the name selection, and re-name the model.
At this point we have set up the system mode for our plane. One important thing to note is the flaperon set-up that we put into the wing type selection. This feature mixes the aileron channel with the aux 1 or channel six, so that they will both work as ailerons, and we can set them up to work as flaps as well. Plug the right aileron in to channel 2 and the left into channel 6.

Function Mode

Next we will set up the function mode of transmitter. If you are still in the system mode, just press the up and down keys together twice, or turn the radio off and back on, and press the up and down keys together again. This will get you into the function mode.

Dual Rate and Exponential Set-Up

Now that we are in the function mode, it brings you to the dual rate set-up. You can set these to your desired amounts. Press the channel key to select the channel, and the + and – keys to set the rates. I would set up the high rate at 100% and the low rate between 50% and 75% for the elevator and aileron, and between 60% and 80% for the rudder. Next press the select key to get to the expo set up for each channel, and use the + and – keys to set the values. You can set various values for each rate. I use around 50% expo on high rate elevator and aileron and between 20% and 50% on high rate rudder. I would use around 20% to 30% on low rate elevator and aileron, and 10% to 15% on low rate aileron.

Travel Adjustment

Next we will set up the travel adjustments, so press the up key till you get to the screen where it says TRVL ADJ. in at the top left hand side of the screen. Your manual gives a good description of how to adjust these. Press the select key to get to the second set of 4 channels for adjusting the travel. For a full 3D plane, I would set the travel adjustments to 150% on the control surface channels including aux 1 and aux 2 which in the travel adjustment will be labeled FLAP and SPOI. This will help enable the large control surface throws using the highest mechanical advantage possible, as you are using the full movement of the servo. Then set your distances out on the servo arm to the linkage as small as possible and the control horn to the linkage to as large as possible, and still maintain 40 to 45 degrees travel on the surfaces. Follow the planes recommendations for the linkage set up. This is very crucial, as an incorrect set up will lead to flutter.

Aileron Differential

Next press the up key till you get to DIFFEREN. This is where you will set-up the differential in the ailerons. You will use this to help the plane roll more axially. This feature makes the aileron go further up, than down. This is necessary due to differences in lift and drag generated by the up and down going ailerons, creating a yawing moment on the plane. Having the up going aileron going further up than down, minimizes the effect. The amount required will vary plane by plane. If the manual for the plane gives a guideline for the amount of differential follow it. If it does not give a guideline, start out with 5% to 10%, and adjust after flying to improve the roll characteristics.

Completion of Aileron Set-Up

Now we need to remove the flap pot from operating the ailerons as flaps. If you like having this ability, you can continue to the next paragraph. Press the up key till the screen says FLAP POT. Press the CLR button until this says POT. INH. This will eliminate the pot function.