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Futaba S 3003 Servo Flutter???

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Old 09-06-2004, 04:25 PM
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buchtes
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Default Futaba S 3003 Servo Flutter???

My Futaba S 3003 Servo in the wing of a C.G. Chipmunk ( starboard side) has a strange " flutter"
seems when I give aileron up or down, it goes in the designated direction, but immediately echo's back about 50% of the original position. Kind of hard to explain, it seems like it stutters or echo's. So far I have not found any bad flying habits because of it, it just seems strange to do that. The S 3003's are connected via Y - Harness to the receiver. I'm just nosy????????????????
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Old 09-06-2004, 06:02 PM
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Hughes500E
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Default RE: Futaba S 3003 Servo Flutter???

Are you using any extensions? Could just be a slightly coroded pin.
Seen it before!
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Old 09-07-2004, 02:35 AM
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Default RE: Futaba S 3003 Servo Flutter???

Probably a worn pot. Try with another servo and if the "flutter" vanished it is the servo.

Servos (esp. pots and gears) are consumables.
Large ailerons cause a lot of stress to servos. The old way of using a single servo for ailerons is better in this respect.


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Old 09-12-2004, 09:21 PM
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Default RE: Futaba S 3003 Servo Flutter???

Just wondering...are you using different servos on the same control surface. I mean 3003 on starboard and something else on the port wing? Not that this is the problem, but I was just curious if you could tell the difference between two servos on the same type of control ex 3003on one wing and a 148 on the other? Probably couldn't tell,....anyone think otherwise?
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Old 09-12-2004, 10:00 PM
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Default RE: Futaba S 3003 Servo Flutter???

I've had this happen for several reasons. Yes a bad pot will cause it. Also dirty connections on your extension. Try plugging and unplugging them 5 or 10 times and see if that solves the problem. They will tarnish up sometimes and this will clean them. Next on the list is how long are your leads? I found that 34 to 36" was the max I could go with std wire on a 4.8 volt system before they acted like this. Either try HD wire extensions(20 gauge), or try a 6 volt pack.Good luck!
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Old 09-16-2004, 01:15 PM
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Default RE: Futaba S 3003 Servo Flutter???

That sounds exactly like a bad connection with the extension wire. I just saw something similar on Sunday at the field. A defect pot usually shows problems around the center or trying to find the center, but if it is deflected and it bounces, then that sounds like a bad connection. I use HD extension even on my 12" or 18" wires and only have 6.0 Volt batteries now.
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