I did first flight on my RV-14A today (N96KW). Overall things went well, and it flew quite nicely!
However, like all first flights (this was my 12th). There are a few things that need addressing. Most significant is a pitch trim issue.
During flight the pitch trim stopped working. It blew the breaker, I reset it, and as soon as I tried to move the trim it would blow again.
After I landed, I tried to recreate the issue. I could get the trim to run (no blown breaker) but it would only run in one direction, and at a very slow speed.
After some troubleshooting, we determined.
The trim servo (Ray Allen) works fine. Putting 12 Volts directly to it runs the motor in both directions as you would expect.
The VP/X is only putting out 10.2 volts to the Servo (reported as 12.4 volts at the battery and via the VP/X
Only 2.5 volts is recorded when the servo motor is hooked up and running (very slowly)
The VP/X is only putting out voltage in one direction. I.e. the Grey and White wire are no longer switching direction. It does not matter if the trim is activated from either stich, the screen, or the PC connected to the VP/X
The trim worked normally and in both directions before the flight. We had a loose wire (crimp) that was corrected. Trim servo was run all the way in both directions several times to test.
Any suggestions you have for troubleshooting would be greatly appreciated.
VPX log attached in case anyone wants to try and decipher...
Thank you,
-Dan
However, like all first flights (this was my 12th). There are a few things that need addressing. Most significant is a pitch trim issue.
During flight the pitch trim stopped working. It blew the breaker, I reset it, and as soon as I tried to move the trim it would blow again.
After I landed, I tried to recreate the issue. I could get the trim to run (no blown breaker) but it would only run in one direction, and at a very slow speed.
After some troubleshooting, we determined.
The trim servo (Ray Allen) works fine. Putting 12 Volts directly to it runs the motor in both directions as you would expect.
The VP/X is only putting out 10.2 volts to the Servo (reported as 12.4 volts at the battery and via the VP/X
Only 2.5 volts is recorded when the servo motor is hooked up and running (very slowly)
The VP/X is only putting out voltage in one direction. I.e. the Grey and White wire are no longer switching direction. It does not matter if the trim is activated from either stich, the screen, or the PC connected to the VP/X
The trim worked normally and in both directions before the flight. We had a loose wire (crimp) that was corrected. Trim servo was run all the way in both directions several times to test.
Any suggestions you have for troubleshooting would be greatly appreciated.
VPX log attached in case anyone wants to try and decipher...
Thank you,
-Dan