6XAs system programming question
06-23-2015 | 06:02 AM
#1
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6XAs system programming question
I'm currently trying to decipher the instructions for setting up a Futaba 6XAs/6XAs radio system for an aircraft I'm building.
The aircraft in question is a Great Planes 40 size J-3 Cub. It will be powered with an OS Max 40 XF, although that has nothing to do with my question(s). I want to use two servos for ailerons, and then one each for elevator, rudder and throttle. Servos to be used are Futaba S3003 for everything but the throttle which will be use an FP-S148.
From my multiple readings of the instruction manual, I have come to the conclusion that in order to use two aileron servos, I need to put one servo on Ch 1 and the other on Ch 6 and then activate the FLPR function. Note that this aircraft has no flaps, and I don't want, nor do I intend to install them.
My reading leads me to believe that in setting up this configuration I can control the up and down travel of each aileron independantly via the adjustable travel limits for each channel. I also have come to the conclusion that as long as I set the differential so that the up and down travel are the same, and do not move the flap knob off the min or "0" setting, I can have what I want, and still preserve the maximum available trim and subtrim settings.
The manual states that the servo throw, at default settings, is "approximately" 40 degrees for channels 1-4, and 55 degrees for channels 5 and 6.
1. Am I correct that these stated values are + and - from neutral?
2. Does the difference between CH 1 and Ch 6 throws still apply in the described configuration? Will I have to massage the ATV settings as well as the differential?
3. How "approximate" is the 40 or 55 degree number? + or - 1, 5, ?
4. Why would a manufacturer not build the system so that all channels respond the same within the design tolerances?
Thanks for any clarification.
Diggr
The aircraft in question is a Great Planes 40 size J-3 Cub. It will be powered with an OS Max 40 XF, although that has nothing to do with my question(s). I want to use two servos for ailerons, and then one each for elevator, rudder and throttle. Servos to be used are Futaba S3003 for everything but the throttle which will be use an FP-S148.
From my multiple readings of the instruction manual, I have come to the conclusion that in order to use two aileron servos, I need to put one servo on Ch 1 and the other on Ch 6 and then activate the FLPR function. Note that this aircraft has no flaps, and I don't want, nor do I intend to install them.
My reading leads me to believe that in setting up this configuration I can control the up and down travel of each aileron independantly via the adjustable travel limits for each channel. I also have come to the conclusion that as long as I set the differential so that the up and down travel are the same, and do not move the flap knob off the min or "0" setting, I can have what I want, and still preserve the maximum available trim and subtrim settings.
The manual states that the servo throw, at default settings, is "approximately" 40 degrees for channels 1-4, and 55 degrees for channels 5 and 6.
1. Am I correct that these stated values are + and - from neutral?
2. Does the difference between CH 1 and Ch 6 throws still apply in the described configuration? Will I have to massage the ATV settings as well as the differential?
3. How "approximate" is the 40 or 55 degree number? + or - 1, 5, ?
4. Why would a manufacturer not build the system so that all channels respond the same within the design tolerances?
Thanks for any clarification.
Diggr
06-23-2015 | 08:04 AM
#2
My Feedback: (11)
The values are +/- from neutral. The throws might still apply. It's not unusual to have to set the different endpoints as needed.
The degrees of servo deflection would be within a degree or two. Exact precision isn't a requirement.
Channels 1-4 are the primary flight controls and must accommodate the inclusion of trim, which extends the range of travel past the movement of the sticks. The other channels don't have trim, so their full movement is given. If you look at the total possible movement of channels 1-4 and then add the trim range, you get the same travel as the other channels.
The degrees of servo deflection would be within a degree or two. Exact precision isn't a requirement.
Channels 1-4 are the primary flight controls and must accommodate the inclusion of trim, which extends the range of travel past the movement of the sticks. The other channels don't have trim, so their full movement is given. If you look at the total possible movement of channels 1-4 and then add the trim range, you get the same travel as the other channels.
