REFLECTOR: DYNON AHARS location again

[Alex Balic]

I am with Chris on the problem of having the pitot  static system going to
the AHRS module- not sure why they do that- it means that if you need to
really remote the unit then you need to run nylaflow all the way out to that
location- the BMA system and I believe some of the Dynon units plumbed the
pneumatics directly to the processor box, which could be located anywhere.

 

  _____  

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Hiroo Umeno
Sent: Wednesday, June 29, 2011 1:52 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: DYNON AHARS location again

 

Mine is pretty tall and could not place it offset on the Canard.  The only
way it would fit was fairly centered and that made it pretty close to the
trim motor.  My AHRS is FOG based and therefore fairly tall.  I noticed that
many of the modern MEMs AHRS / (G)ADHARS units are fairly small and will
give you more flexibility.

 

When I get a chance, I am going to "hack" one of the newer units to talk the
older language for placement flexibility.  One of many "when I get a chance"
projects.

 

Hiroo

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Michael Watson
Sent: Wednesday, June 29, 2011 9:10 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: DYNON AHARS location again

 

I have my GRT AHRS on top of the left side of the canard away from the trim
actuator.
I have not encountered any problems in five years.

On Tue, Jun 28, 2011 at 12:27 PM, Hiroo Umeno <humeno at microsoft.com> wrote:

Not a Dynon but I initially placed my Sierra/Chelton/Corban AHRS between the
two back seats on my SUV.  The back seats are on glass base
(non-adjustable).  I noticed heading drift based on engine RPM at that
location so I had to move it away.  I also had problems in the nose based on
current draw due to proximity to battery.

 

I currently have it in the strake baggage area, a location I am not entirely
happy with.

 

Hiroo

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Alex Balic
Sent: Tuesday, June 28, 2011 7:35 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: REFLECTOR: DYNON AHARS location again

 

Getting back to the recent discussion about Dynon AHARS placement- there was
a suggestion to put it under the rear seat- I like this location because it
is generally away from everything electrical except my AP servo (about  20")
but that has twisted pairs, so might be OK- anyway- did the person who
located it under the rear seats have the metal seat tracks, or was it with
the built up rear FG deck? I didn't notice any particular magnetic issues in
my area, although I have the floor mounted metal tracks so the seats can be
adjusted or removed, - didn't want to have the sensor located out of reach
inside the strake where I would have to remove the wing to get to it.  Any
suggestions?


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-- 
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
Dual GRT EFIS HX Synthetic Vision

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