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01-08-2017, 12:22 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by Tony_T
The pitch servo is under the pilot seat pan. The roll servo is behind the baggage bulkhead. You can familiarize by looking at the plans section 44A.
http://www.vansaircraft.com/pdf/revi.../RV-12_44A.pdf
You say the aircraft turns when you press the "LEVEL" button? That doesn't sound good.
The Dynon SV Installation manual ( http://dynonavionics.com/skyview-documentation.php) has all the procedures for installation, configuration, calibration and includes a test of the autopilot servos. That must be what Bill was referring to.
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The RV-12 Maint. Manual is another good resource for info need to repair and maintain the RV-12.
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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01-08-2017, 01:09 PM
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Join Date: Apr 2013
Location: Mequon, WI
Posts: 114
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Autopilot
Thank you again.....As suggested I tried autopilot LEVEL flight while sitting in the hanger and it consistently pulls RIGHT until it starts chattering reaching limits.
Back home now but I'll go back to the hanger and do:
1. the test,
2. calibrate,
3. get sheer pins....
__________________
Tim
RV-12. SLSA
Paid $50 for this year. Priceless !
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01-08-2017, 01:37 PM
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Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,065
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Mequon, WI -> might try some heat... 
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Jim Stricker
EAA #499867
PPL/ASEL 1970 - Sport Pilot since 2007
80 hrs Flying Aeronca Chief 11AC N86203
1130 hrs Flying 46 Piper J-3 Cub N6841H
Bought Flying RV-12 #120058 Oct 2015 with 48TT - Hobbs now 622 
LSRM-A Certificate 2016 for RV-12 N633CM
Special Thanks... EJ Trucks - USN Crew Chief A-4 Skyhawk
MJ Stricker (Father & CFI) - USAAF 1st Lt. Captain B-17H
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01-08-2017, 01:47 PM
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Join Date: May 2005
Location: X35 - Ocala, FL
Posts: 3,679
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Quote:
Originally Posted by TLYNCH
Thank you again.....As suggested I tried autopilot LEVEL flight while sitting in the hanger and it consistently pulls RIGHT until it starts chattering reaching limits.
Back home now but I'll go back to the hanger and do:
1. the test,
2. calibrate,
3. get sheer pins....
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With that symptom it would need max one shear screw. It needs to be recalibrated. Depending on what it did in pitch, you probably don't even need one shear screw. Keep us posted.
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Jesse Saint
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01-09-2017, 07:14 AM
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Join Date: Nov 2015
Location: Mequon, WI
Posts: 40
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RV12 Autopilot
Hi Tim,
Please check your Private Messages
Barry
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01-10-2017, 08:32 AM
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Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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Your post helped me Jesse on an unrelated problem. Years ago I had calibrated and tested my servos, all was well. The last time I ran a test, it went violently to the stops and chattered like it was trying to tear something up. I had not got back to trouble shooting it but your post made me think: Maybe it needs calibrating again for some reason. I re calibrated it and the test now shows it is working just fine. That was a load off my shoulders, thanks.
Quote:
Originally Posted by Jesse
To test, hold button 7&8 together to enter setup. Scroll to the bottom to Hardware Calibration. There is an option in that list for auto pilot. Select test and run the test following the instructions on the screen. If that works, then the shear screws are probably fine. If not, then replace them. If it works, but not correctly, then another options in the list was Calibration, which you go to and follow the instructions on the screen to recalibrate.
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01-21-2017, 09:51 PM
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Join Date: Apr 2013
Location: Mequon, WI
Posts: 114
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Servos
Problem solved following Barry's advice. He could feel/hear the servos moving with the stick, so he knew the problem was not sheer pin. He loaded new software and ....it's fixed. !!! Thank you Barry!
__________________
Tim
RV-12. SLSA
Paid $50 for this year. Priceless !
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