wait wait. Are you saying, the only wiring is from the pitch servo to the yaw damper? Nothing to the panel?! Oh Lord, Do I Want to Know the answer?$
wait wait. Are you saying, the only wiring is from the pitch servo to the yaw damper? Nothing to the panel?! Oh Lord, Do I Want to Know the answer?$
Eddie Forward
Flying
SS7, 912iS, Garmin G3X
Yup. Nothing to the panel. All the wiring I need to tie into in order to add the yaw servo is at the pitch servo. CANBUS, 12V, Ground, Autopilot disconnect is all there. Right now my pitch servo is at the end of my CANBUS run so I need to clip the jumper that I have on that connector that sets the BUS termination. The CANBUS gets extended to the yaw dampener
(just like you hooked all your components together on the system as a whole) and the termination jumper gets put on the yaw connector. No runs required to the panel - the beauty of the BUS.
G
Last edited by Geek; 01-17-2024 at 09:13 PM.
Gary (Geek) Phenning
Leavenworth (Not the Prison), WA
Kitfox STi N68SG
Nice, something to consider thanks.
I think Brandon did a great job on building up this kit and the design. I snaked a pic from Dustin (Dual STi Build Log) on the parts that connect to the rudder (since I don't have the servo yet.) Take a look at his build log (last few posts - easy to find). He did a great job of writing up his experience in doing the install
G
IMG_3382.jpg
Gary (Geek) Phenning
Leavenworth (Not the Prison), WA
Kitfox STi N68SG
Ok, Geek (Gary). Quick question. The buss takes care of the signal, so you don't have to wire that to the panel. What about power? Will you make a run back to your power buss? Or, tap into something else towards the back?
Your build is looking good. Hope to see you in June.
Ralph
Kitfox 3 flying
Building Kitfox SS7 (RockFox)
915iS Engine
Building Partner Victor V
Thanks Ralph. Good to hear from you and look forward to seeing you in June. Same power run from the VPX that currently runs/goes to the pitch and roll servos. With the VPX controlling the current, I set the autopilot circuit at 6A which should be fine if I read the current requirements in the manual correctly AND I could never think of anytime that all three servos would pull max current at the same time. (Spec for the servos is 0.36A typical and 1.8A Maximum so all three at max would be 5.4A). If it does, I think I probably should not be flying with the autopilot on anyway.
Geek
Gary (Geek) Phenning
Leavenworth (Not the Prison), WA
Kitfox STi N68SG
Thanks, on review of our wiring, we have 20 ga wire to each servo from the VPX on their own dedicated circuit. If we decide on installing a yaw damper, we will have to either increase the size of one power or run a dedicated circuit. You made it sound so easy. We knew it was too good to be true.
Ralph
Kitfox 3 flying
Building Kitfox SS7 (RockFox)
915iS Engine
Building Partner Victor V
Ralph I had a dedicated circuit with 20 gauge to each servo. (Roll and pitch) Mil spec 20 Gauge is good to about 8-9 amps. I just pulled power from the roll servo at the roll servo. Also tied into the canbus there. Solider sleeved it and ran wire back to the pitch servo. I went back an changed the VPX labeling so Roll is now Roll/Yaw Servos. With the autopilot on and trying to overpower the servos I saw just over 1 amp. Its less than that during flight. Doing it again I would of put all 3 servos on one circuit. GSa-28 has an average .4 amp draw. If you have your servos wired to the 5amp circuit that is plenty. I have quite a few hours on the yaw dam setup now and it working great with absolutely no regrets of doing. I agree with Brandon, don't think I could fly without it now!
Last edited by Shadowrider; 01-22-2024 at 09:13 AM.
Dustin Dickerson
Building 7ss STI x 2
Oratex
29" shock monster
EP912STI 155hp
Garmin
N33TF......FLYING!
N53TF......FLYING!
What Dustin said. Even at the specified max current draw of 1.8A, two servos trying to draw the max at the same time would only be 3.6A. The 20 gauge would be more than enough for that and I like I said, if two or three of those servos are trying to pull max current for a longer period of time (greater than something in the millisecond range) then I should be flying the plane and not the autopilot. I think with two servos on one circuit you are MORE than covered. I've got three servos on one circuit and think that's good to go. I'll hawk the current draw once I start flying but taking Dustin's observations, where he pushed the servos into trying to overcome his control inputs, you should be golden with splicing into one of your existing servos.
G
Gary (Geek) Phenning
Leavenworth (Not the Prison), WA
Kitfox STi N68SG