ADAHRS lOCATION ON ES

Submitted by Anonymous on

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From: Tom Wallace <tlwcfii [at] yahoo.com>
Sender: <marv [at] lancaironline.net>
Subject: ADAHRS lOCATION ON ES
Date: Wed, 11 Jun 2014 13:39:22 -0400
To: <lml [at] lancaironline.net>

I am installing 2 Dynon ADAHRS units in my ES and trying to decide what location would be best to stay clear of magnetic interference.  I think that under the pilot seats between the bullheads might work if these are the only electronic instruments put there.  There is some ferrous materials in that area like the seat frames and fasteners.  Has anyone mounted their units there and if so how do they perform?  Are there better places for the units?

 

Any help would be appreciated.

 

 

Blue Skies,

Personal Signature

Tom

N726TW

 

 


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ADAHRS lOCATION ON ES

Submitted by Anonymous on

From: Colyn Case <colyncase [at] earthlink.net>
Subject: Re: [LML] ADAHRS lOCATION ON ES
Date: Wed, 11 Jun 2014 17:23:46 -0400
To: Lancair Mailing List <lml [at] lancaironline.net>
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I have no experience with the Dynon units.   However I did mount a century flux gate in my IV-P under the glass area in front of the v-stab.   It was wildly off until I discovered some ferrous screws in the antenna  tray.   It doesn't take much.


On Jun 11, 2014, at 1:39 PM, Tom Wallace wrote:



I am installing 2 Dynon ADAHRS units in my ES and trying to decide what location would be best to stay clear of magnetic interference.  I think that under the pilot seats between the bullheads might work if these are the only electronic instruments put there.  There is some ferrous materials in that area like the seat frames and fasteners.  Has anyone mounted their units there and if so how do they perform?  Are there better places for the units?

 

Any help would be appreciated.

 

 

Blue Skies,

<image002.jpg>

Tom

N726TW

 

 

ADAHRS lOCATION ON ES

Submitted by Anonymous on

From: Tom Thibault <tom [at] lachollatech.com>
Sender: <marv [at] lancaironline.net>
Subject: RE: ADAHRS lOCATION ON ES
Date: Thu, 12 Jun 2014 07:33:29 -0400
To: <lml [at] lancaironline.net>
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Undecoded Message

Both Randy Snarr and I have full-up Dynon installations in LNC2 models.



Don't know much about the cockpit of an ES, but Dynon wants you to avoid all ferrous metal that moves,  motors, fluctuating high current etc.  The compass calibration can deal with some stationary ferrous metal.



In my case, I put the ADAHRS aft of the baggage closeout (just into the tail cone) on a fabricated composite shelf bonded to the side of the A/C.  It is fastened down with brass hardware.  BTW, if you use their heated pitot (with or without AOA) and with all aluminum lines to the ADAHRS, be aware that the aluminum lines WILL be the return path for the pitot heater current on a non-conductive airframe.  I found this out the hard way on mine.  Until I isolated it, the Dynon compass would swing 25 degrees every time the heater cycled on or off.  The fix was just to insert a one inch section of non-metallic line in each of the three inputs to the ADAHRS.  That made the compass correct all the time.



Since Dynon installs are much more common in Van's A/C, the tech support folks were not aware of the issue on composite A/C.



Tom Thibault

LNC2

ADAHRS lOCATION ON ES

Submitted by Anonymous on

From: Daniel Barnes <dbarnes78 [at] comcast.net>
Sender: <marv [at] lancaironline.net>
Subject: RE: [LML] Re: ADAHRS lOCATION ON ES
Date: Thu, 12 Jun 2014 07:34:26 -0400
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message

I originally had mine under the back seat
in between the flap torque tube and the elevator torque tube.  I had a
huge about of interference from both.  I moved them to under the pilot’s
seat and they worked fine.

 

Dan
Barnes

 

From:
Lancair Mailing List [lml [at] lancaironline.net]">mailto:lml [at] lancaironline.net] On Behalf Of Colyn Case

Sent: Wednesday, June 11, 2014 4:24
PM

To:
Lancair
Mailing List

Subject: [LML] Re: ADAHRS lOCATION
ON ES

 

I have no experience with the Dynon units.   However I did mount a
century flux gate in my IV-P under the glass area in front of the v-stab.
  It was wildly off until I discovered some ferrous screws in the antenna
 tray.   It doesn't take much.

 

On Jun 11, 2014, at 1:39 PM, Tom Wallace wrote:





I am installing 2
Dynon ADAHRS units in my ES and trying to decide what location would be best to
stay clear of magnetic interference.  I think that under the pilot seats
between the bullheads might work if these are the only electronic instruments
put there.  There is some ferrous materials in that area like the seat
frames and fasteners.  Has anyone mounted their units there and if so how
do they perform?  Are there better places for the units?

 

Any help would be
appreciated.

 

 

Blue Skies,

<image002.jpg>

Tom

N726TW

 

 

 

ADAHRS lOCATION ON ES

Submitted by Anonymous on

From: Gary Casey <casey.gary [at] yahoo.com>
Sender: <marv [at] lancaironline.net>
Subject: Re: ADAHRS lOCATION ON ES
Date: Thu, 12 Jun 2014 07:35:01 -0400
To: <lml [at] lancaironline.net>
Message Header


Undecoded Message
I installed my Pinpoint unit under the back seat.  Yes, it does seem to be surrounded by steel with the torque tubes for the flap and elevator, but it works very well.
Gary Casey


I am installing 2 Dynon ADAHRS units in my ES and trying to decide what
location would be best to stay clear of magnetic interference.  I think that
under the pilot seats between the bullheads might work if these are the only
electronic instruments put there.  There is some ferrous materials in that
area like the seat frames and fasteners.  Has anyone mounted their units
there and if so how do they perform?  Are there better places for the
units?



Any help would be appreciated.





Blue Skies,

Personal Signature

Tom