|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

01-02-2015, 03:18 PM
|
|
|
|
Join Date: May 2005
Location: Effingham, IL
Posts: 68
|
|
Altitude Hold RV-12
I haven't read the book but am having an issue with the autopilot searching around for the altitude that I started off with. It gets worse with oscillation's
any advice besides reading the book?
__________________
Stan Bahrns
RV-7A QB
N868B 365 hrs
RV12 40 hrs
Effingham,(southern) ILL
|

01-02-2015, 03:29 PM
|
|
|
|
Join Date: Nov 2008
Location: Gloversville, NY
Posts: 1,587
|
|
D180 or Skyview? Software version? More info needed. FWIW, in the D-180 implementation there are bunch of parameters that can be adjusted. All in "the book". Once you get all the the tweaks done I think you will be pleased with the stability.
__________________
John Peck, CFII, A&P, EAA Tech Counselor, Flight Advisor.
?Master Pilot? Award, UFO Member.
RV-12 N37JP 120176 Flying since 2012.
One Week Wonder Build Team, OSH 2018.
VAF paid through 10/2019.
|

01-02-2015, 04:05 PM
|
|
|
|
Join Date: May 2005
Location: Effingham, IL
Posts: 68
|
|
Altitude Hold
It's a Skyview. Thanks, I guess I better read the book
__________________
Stan Bahrns
RV-7A QB
N868B 365 hrs
RV12 40 hrs
Effingham,(southern) ILL
|

01-02-2015, 04:47 PM
|
 |
|
|
Join Date: May 2005
Location: X35 - Ocala, FL
Posts: 3,679
|
|
You can change the settings for the pitch servo in the settings. Maybe just play with them a little bit to get it where it feels good.
__________________
Jesse Saint
|

01-02-2015, 04:58 PM
|
|
|
|
Join Date: Sep 2006
Location: Windsor, California
Posts: 924
|
|
Read the books! Dynon offers both general Skyview install/operations manuals and a separate autopilot set-up manual. Follow their AP tweaking procedures.
__________________
David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
|

01-03-2015, 11:36 AM
|
 |
|
|
Join Date: Aug 2005
Posts: 845
|
|
Quote:
Originally Posted by Stan Bahrns
I haven't read the book but am having an issue with the autopilot searching around for the altitude that I started off with. It gets worse with oscillation's
any advice besides reading the book?
|
Mine hunted around quite a bit in altitude hold. Others have mentioned the availability of a tuning guide, but the quick fix for mine was to lower the 'gain' value in the autopilot settings.
__________________
Dave Gamble
Grove City, OH
RV-6 N466PG Purchased already flying - SOLD!
The Book: The PapaGolf Chronicles
Built RV-12
http://www.schmetterlingaviation.com
The Book: Being written.
The above web blogs and any links provided thereto are not instructional or advisory in nature. They merely seek to share my experiences in building and flying Van's RV airplanes.
|

01-03-2015, 10:15 PM
|
|
|
|
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,820
|
|
Dave,
My D180 pulses the stick at about 1 Hz. Not enough to porpoise but annoying. Did the gain reduction eliminate that on your AP?
Rich
|

01-04-2015, 04:43 AM
|
 |
|
|
Join Date: Aug 2005
Posts: 845
|
|
Quote:
Originally Posted by RFSchaller
Dave,
My D180 pulses the stick at about 1 Hz. Not enough to porpoise but annoying. Did the gain reduction eliminate that on your AP?
Rich
|
I don't think so. Seems like I've notices that there's always some kind of 'feel' in the stick when the AP is on and your description of it fits my memory of it. Almost a clicking kind of thing. I've can't say for sure if it's always there, but I do notice it from time to time.
__________________
Dave Gamble
Grove City, OH
RV-6 N466PG Purchased already flying - SOLD!
The Book: The PapaGolf Chronicles
Built RV-12
http://www.schmetterlingaviation.com
The Book: Being written.
The above web blogs and any links provided thereto are not instructional or advisory in nature. They merely seek to share my experiences in building and flying Van's RV airplanes.
|

01-04-2015, 09:02 AM
|
|
|
|
Join Date: May 2013
Location: Temecula, CA
Posts: 295
|
|
Dave G, please check your PM's.
Alex
__________________
Alex Erdelyi
RV-9A Purchased
RV-12 Built and Sold
Paid through December, 2020
|

01-05-2015, 03:19 PM
|
 |
|
|
Join Date: Apr 2010
Location: Tucson, AZ
Posts: 461
|
|
I had this oscillation issue too while others reported good performance. I tried tuning it a bit but didn't get it satisfactory. Eventually I looked at my values and compared them to the published default values (you find them in the tuning guide) and they were all ways off, even the ones I had never touched. I suspect that my unit was once installed in a different airplane and got refurbished and sent to me (hey, after my previous various experiences with Dynon this would not surprise me at all). I reset the settings to default values and have a much better performing system since. I still disable the autopilot when the air is rough but that might just be me preferring direct control under such conditions.
|
| Thread Tools |
Search this Thread |
|
|
|
| Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 06:53 AM.
|