JR 8711 Jitter's
04-22-2008, 01:04 AM
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JR 8711 Jitter's
Hi all,
My 8711 servo jitter's on my pull pull rudder and I was wondering if I should send it in for service? It didn't start doing this until about the 20th flight and my bigest fear is a hard over rudder in mid-flight!! [X(]
Thank's Marc 540[8D]
My 8711 servo jitter's on my pull pull rudder and I was wondering if I should send it in for service? It didn't start doing this until about the 20th flight and my bigest fear is a hard over rudder in mid-flight!! [X(]
Thank's Marc 540[8D]
04-22-2008, 06:54 AM
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RE: JR 8711 Jitter's
Good question Marc, I have one on the rudder of my WH 35% Extra. It started the side to side jittering on the 4th or 5th flight. Touch it and it stops. Really annoying. The guys I talked to said its no problem in flight cause the air pressure keeps it stabilized.
04-22-2008, 08:06 AM
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RE: JR 8711 Jitter's
Hello,
i have the same problem and it is really annoying!
If you tighten the pull-pull wire it will go away for a while but then comes again....
My servo came new with a lot of play for such an "high end" servo. [:@]
i have the same problem and it is really annoying!
If you tighten the pull-pull wire it will go away for a while but then comes again....
My servo came new with a lot of play for such an "high end" servo. [:@]
04-22-2008, 08:57 AM
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RE: JR 8711 Jitter's
Marc
Read this Thread watch the Video...........
http://media.putfile.com/JR8711-Servo-
If it looks like this the servo is defective and U nned to send it in for a replacement.
http://www.rcuniverse.com/forum/m_73.../tm.htm7350261
Ian
Read this Thread watch the Video...........
http://media.putfile.com/JR8711-Servo-
If it looks like this the servo is defective and U nned to send it in for a replacement.
http://www.rcuniverse.com/forum/m_73.../tm.htm7350261
Ian
04-22-2008, 08:59 AM
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RE: JR 8711 Jitter's
Marc
Read this Thread watch the Video...........
http://media.putfile.com/JR8711-Servo-chatter
If it looks like this the servo is defective and U need to send it in for a replacement.
http://www.rcuniverse.com/forum/m_73.../tm.htm7350261
Ian
Read this Thread watch the Video...........
http://media.putfile.com/JR8711-Servo-chatter
If it looks like this the servo is defective and U need to send it in for a replacement.
http://www.rcuniverse.com/forum/m_73.../tm.htm7350261
Ian
04-22-2008, 11:52 AM
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RE: JR 8711 Jitter's
On my 35% planes, I have my JR8711 on direct rudder push/pull with the servo mounted around 6" away from the rudder control horn.
All of these planes have occasional to steady jitters when in the neutral position. As soon as I give some stick movement, the jitters stop. I believe this is from the fact that at the rudder neutral position, there is no forces on the servo. These servos have a tight dead band meaning the servo is always hunting for a center position that does not exist at no load center. At any rate, I have precise rudder control in the air.
SWK550
All of these planes have occasional to steady jitters when in the neutral position. As soon as I give some stick movement, the jitters stop. I believe this is from the fact that at the rudder neutral position, there is no forces on the servo. These servos have a tight dead band meaning the servo is always hunting for a center position that does not exist at no load center. At any rate, I have precise rudder control in the air.
SWK550
04-23-2008, 01:32 AM
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RE: JR 8711 Jitter's
So does this mean that I should not fear the dreaded hard over rudder in flight? Thank's for all the replie's and more opinion's very welcome!
Marc 540[8D]
Marc 540[8D]
04-23-2008, 08:06 AM
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RE: JR 8711 Jitter's
ORIGINAL: swk550
On my 35% planes, I have my JR8711 on direct rudder push/pull with the servo mounted around 6" away from the rudder control horn.
All of these planes have occasional to steady jitters when in the neutral position. As soon as I give some stick movement, the jitters stop. I believe this is from the fact that at the rudder neutral position, there is no forces on the servo. These servos have a tight dead band meaning the servo is always hunting for a center position that does not exist at no load center. At any rate, I have precise rudder control in the air.
SWK550
On my 35% planes, I have my JR8711 on direct rudder push/pull with the servo mounted around 6" away from the rudder control horn.
All of these planes have occasional to steady jitters when in the neutral position. As soon as I give some stick movement, the jitters stop. I believe this is from the fact that at the rudder neutral position, there is no forces on the servo. These servos have a tight dead band meaning the servo is always hunting for a center position that does not exist at no load center. At any rate, I have precise rudder control in the air.
SWK550
Steve has it 100% correct.
Turn the plane on its side and I gurantee the rudder servo will not jitter due to the weight of the rudder being loaded on the servo now.
04-23-2008, 02:07 PM
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RE: JR 8711 Jitter's
If the jittering (hunting for center) really bugs you like it did me, you can fill the gap between the rudder counter balance and vertical stab with a few layers of your favorite iron on covering. Depending on how large a gap you have, 2 or 3 usually will do it. Just enough to fill the void and provide a slight dampening effect at center. You can experiment first with a few strips of electrical or masking tape applied to the vertical stab to see if this will work for you.. I've also applied (glued) a layer of thin clear poly (the thin clear plastic used for windows and windshields on my models) to fill the gap thus applying a very slight resistance at center between the counter balance and v-stab. Works for me...[)]
04-25-2008, 01:13 AM
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RE: JR 8711 Jitter's
ORIGINAL: wgeffon
Steve has it 100% correct.
Turn the plane on its side and I gurantee the rudder servo will not jitter due to the weight of the rudder being loaded on the servo now.
ORIGINAL: swk550
On my 35% planes, I have my JR8711 on direct rudder push/pull with the servo mounted around 6" away from the rudder control horn.
All of these planes have occasional to steady jitters when in the neutral position. As soon as I give some stick movement, the jitters stop. I believe this is from the fact that at the rudder neutral position, there is no forces on the servo. These servos have a tight dead band meaning the servo is always hunting for a center position that does not exist at no load center. At any rate, I have precise rudder control in the air.
SWK550
On my 35% planes, I have my JR8711 on direct rudder push/pull with the servo mounted around 6" away from the rudder control horn.
All of these planes have occasional to steady jitters when in the neutral position. As soon as I give some stick movement, the jitters stop. I believe this is from the fact that at the rudder neutral position, there is no forces on the servo. These servos have a tight dead band meaning the servo is always hunting for a center position that does not exist at no load center. At any rate, I have precise rudder control in the air.
SWK550
Steve has it 100% correct.
Turn the plane on its side and I gurantee the rudder servo will not jitter due to the weight of the rudder being loaded on the servo now.
so does this mean the elev. servo's will jitter when on it's side due to no weight from the elevator's?
Marc 540[8D]
04-25-2008, 07:08 AM
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RE: JR 8711 Jitter's
There is a good chance they will.
However, the elevators are a much smaller surface so you may not see the problem as pronounced.
However, the elevators are a much smaller surface so you may not see the problem as pronounced.
