VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-12/RV-12iS
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 10-17-2019, 06:34 PM
Tacco Tacco is offline
 
Join Date: Jan 2017
Location: White Salmon, WA
Posts: 120
Default ASPD LOW indication Dynon Autopilot

When I disconnect the autopilot (but leave it powered up) I frequently get an ASPD LOW indication when, for example, entering the pattern. It’s extremely annoying because it appears displayed right over the bank indicator. I kinda use that one during slow flight in the pattern! Anyone else have this and what do you do about it?
__________________
Steve Morrow
RV-12 N12SM
Builder 121036
White Salmon, WA

2019 Donation Paid
Reply With Quote
  #2  
Old 10-17-2019, 10:42 PM
pilotyoung pilotyoung is offline
 
Join Date: Jan 2018
Location: Birmingham, AL
Posts: 131
Default ASPD Low

I have had the same issue and wonder why it happens.
__________________
John D. Young, RV-12 Owner
Serial Number 120022, N6812Y
Bought it as a flying airplane in Feb. 2018
Just passed 200 hours flight time in RV-12, and 10,000 hours mostly in corporate jets. I am a CFI; CFII; MEI; and a advancd Ground Instructor, CFIG; and hoping to be able to help new RV-12 owners by doing some transition training for new builders and owners in RV-12's.
Reply With Quote
  #3  
Old 10-17-2019, 10:44 PM
RV8JD's Avatar
RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 396
Default

I also get that in my RV-8 (with the SkyView Touch system) in the pattern (with AP Off) when the target altitude bug is set higher than the altitude I'm at and the airspeed is near 1.3 VS1 or less.

If the aircraft’s altitude drops below the target altitude bug and the autopilot cannot pitch the aircraft up without dropping below the "minimum airspeed", SkyView presents the prompt, even if the AP is not engaged. And the "minimum airspeed" cannot be set lower than 1.3VS1 (where VS1 is the flaps up stall speed).

See page 10-21 & 1-22 in the "System Installation Guide" for more info.

So for the RV-8, VS1 is equal to 64 MPH, and set to that in the Dynon system, and 1.3VS1 = 83.2 MPH. So when I fly at 80 to 85 MPH in the pattern and the target altitude bug is set higher than the altitude I'm at, the "ASPD LOW" warning appears. It is a little irritating, but it's there for AP operation, not a general low speed warning.

I think that after you punch off the AP and reset the target altitude to "0" or less than Field Elevation, it may not display the ASPD LOW warning. But I have not tried it yet.
__________________
Carl N.
Arlington, WA (KAWO)
RV-8, 626 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflügel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 10-17-2019 at 11:04 PM.
Reply With Quote
  #4  
Old 10-17-2019, 10:56 PM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 835
Default

Could be that a single push of the AP Disconnect button (the one next to the throttle) disconnects the AP servo connections but leaves the AP working in the background (i.e., the command bars are still depicted and working and the ASPD Low warning can appear). Double-push the AP Disconnect button and the entire AP system including command bars and ASPD Low warning is shut off. I'll have to double-check this on tomorrow's flight.
__________________
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 - 840+ hours (as of Oct 2019)!
VAF donation through June 2020.
Reply With Quote
  #5  
Old 10-17-2019, 11:01 PM
Air-ic Air-ic is offline
 
Join Date: Nov 2018
Location: Gresham, OR
Posts: 5
Default Bug

I have been able to reproduce this with all of the autopilot alerts as well. Not pictured, but you will notice if you switch to full screen the alert remains in the same location on the screen, but the turn coordinator moves to the center of the screen so it is no longer obscured.

It appears to be a bug in the user interface that was overlooked. I haven't found a way to make it go away other than to not turn on the autopilot at all during a flight.

__________________
Aric Krause
A few RV-12s
Reply With Quote
  #6  
Old 10-17-2019, 11:11 PM
Tacco Tacco is offline
 
Join Date: Jan 2017
Location: White Salmon, WA
Posts: 120
Default

David, let us know if the double click method works.
__________________
Steve Morrow
RV-12 N12SM
Builder 121036
White Salmon, WA

2019 Donation Paid
Reply With Quote
  #7  
Old 10-17-2019, 11:29 PM
RV8JD's Avatar
RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 396
Default

Need to press the AP disconnect button a second time within 1 second to turn off the Flight Director. From page 8-18 of the "Pilot's User Guide":
"Disengaging the Autopilot

When engaged:
• Press the autopilot disconnect switch once to disengage the servos while leaving the flight director active with all active and armed modes unchanged. Press the autopilot disconnect again within 1 second to turn the flight director off (regardless whether the autopilot was engaged)."
Hopefully the ASPD LOW warning then won't appear.
__________________
Carl N.
Arlington, WA (KAWO)
RV-8, 626 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflügel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned

Last edited by RV8JD : 10-23-2019 at 11:34 PM.
Reply With Quote
  #8  
Old 10-23-2019, 11:34 PM
RV8JD's Avatar
RV8JD RV8JD is offline
 
Join Date: Jan 2005
Posts: 396
Default

Quote:
Originally Posted by RV8JD View Post
Need to press the AP disconnect button a second time within 1 second to turn off the Flight Director. From page 8-18 of the "Pilot's User Guide":
"Disengaging the Autopilot

When engaged:
• Press the autopilot disconnect switch once to disengage the servos while leaving the flight director active with all active and armed modes unchanged. Press the autopilot disconnect again within 1 second to turn the flight director off (regardless whether the autopilot was engaged)."
Hopefully the ASPD LOW warning then won't appear.
I flew today and pressing the AP disconnect button twice (within 1 second) turns off the AP and then the Flight Director. Without the Flight Director active, the ASPD LOW warning did not appear.
__________________
Carl N.
Arlington, WA (KAWO)
RV-8, 626 Tach Hours
(Pic 1),(Pic 2)
- Out with the Old, In with the New
(Pic)
RV-8, 1938 Tach Hours (Pic 1),(Pic 2) - Sold

Glasflügel Standard Libelle 201B - Sold
Rolladen-Schneider LS1-f - No longer owned
Reply With Quote
  #9  
Old 10-23-2019, 11:55 PM
DHeal DHeal is offline
 
Join Date: Sep 2006
Location: Windsor, California
Posts: 835
Default

After you double-click the AP Disconnect you may see a yellow "SPD" warning depending on how you set up your AP speed limits. SkyView uses a yellow "SPD" indicator in the Top Bar to denote that the aircraft airspeed is outside of the specified autopilot airspeed range as specified during installation. When SPD is displayed in the Top Bar the autopilot cannot be engaged.
__________________
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 - 840+ hours (as of Oct 2019)!
VAF donation through June 2020.
Reply With Quote
  #10  
Old 10-24-2019, 04:13 PM
N402RH's Avatar
N402RH N402RH is offline
 
Join Date: Oct 2005
Posts: 680
Default

The Skyview Warning Messages covering the slip ball have been fixed and will be in the next production software release.


Rob Hickman
N402RH RV-10
Advanced Flight Systems / Dynon Avionics
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 12:44 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.