9C Servo Reverse
08-07-2005 | 06:48 PM
#1
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From: Fredericton,
NB, CANADA
9C Servo Reverse
There is a thread going in the Transmitter forum about a possible problem with the 9C (not Super). [link=http://www.rcuniverse.com/forum/m_3221291/tm.htm]The 9C Flip/Flop[/link]
I have had a problem with the apparent rudder servo reversal on two separate occasions. The first time was with a newly built and programmed plane and although I was 98% sure I hadn't made an error with the initial programming, I would concede that it is possible. This was on the maiden flight and I caught it in the usual pre-flight. Fast forward a week and a half and it has happened again! Rudder was reversed. I caught it, fixed it and flew normally.
The radio had not been used since the initial flight and I had not even changed models or entered program mode.
The model uses 5 servos (analog)
Non-Futaba flight pack but this should not be an issue!
I have the Campac installed but was using one of the regular model memories (#3)
Servos are rock solid with no glitching
Very good range check
Simple programming - two aileron servos, aileron differential, Flaps programmed but not active
All ATV's at 100% for high rate and ~65% for low
Is there an undocumented programming glitch in this radio? - seems to have happened to more people than just me. Is there a possibility that I have somehow made some sort of programming error (conflict?) that makes the behavior of one or more channels to be erratic?
I could send the radio in for a checkup at some expense to me (from Canada) but with shipping, customs clearance, diagnosis/repair, and return, it is unlikely that I would be flying it again for a month! Also, intermittent glitches like this could be almost impossible to troubleshoot!
If you have no suggestions, I will copy this model to 3 additional memory locations and see if things remain stable. I will also completely erase another couple of positions and reprogram this plane from scratch - just in case there is a problem in my initial programming (inadvertent conflict not picked up by the radio software.)
Reversal on a major control can be easily identified with a good preflight but if there are more subtle glitches (ATV, trims etc), they might not be noticed until the plane was in the air!
Ross
I have had a problem with the apparent rudder servo reversal on two separate occasions. The first time was with a newly built and programmed plane and although I was 98% sure I hadn't made an error with the initial programming, I would concede that it is possible. This was on the maiden flight and I caught it in the usual pre-flight. Fast forward a week and a half and it has happened again! Rudder was reversed. I caught it, fixed it and flew normally.
The radio had not been used since the initial flight and I had not even changed models or entered program mode.
The model uses 5 servos (analog)
Non-Futaba flight pack but this should not be an issue!
I have the Campac installed but was using one of the regular model memories (#3)
Servos are rock solid with no glitching
Very good range check
Simple programming - two aileron servos, aileron differential, Flaps programmed but not active
All ATV's at 100% for high rate and ~65% for low
Is there an undocumented programming glitch in this radio? - seems to have happened to more people than just me. Is there a possibility that I have somehow made some sort of programming error (conflict?) that makes the behavior of one or more channels to be erratic?
I could send the radio in for a checkup at some expense to me (from Canada) but with shipping, customs clearance, diagnosis/repair, and return, it is unlikely that I would be flying it again for a month! Also, intermittent glitches like this could be almost impossible to troubleshoot!
If you have no suggestions, I will copy this model to 3 additional memory locations and see if things remain stable. I will also completely erase another couple of positions and reprogram this plane from scratch - just in case there is a problem in my initial programming (inadvertent conflict not picked up by the radio software.)
Reversal on a major control can be easily identified with a good preflight but if there are more subtle glitches (ATV, trims etc), they might not be noticed until the plane was in the air!
Ross
08-09-2005 | 10:08 AM
#2
My Feedback: (11)
RE: 9C Servo Reverse
We've heard of this, but never seen it in actual practice. No transmitter we've had here could be made to perform the change in settings. We can certainly check any system that is sent here, but, unfortunately, can only correct a difficutly that actually manifests itself in the service department.
