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Old 10-08-2018, 02:15 PM
sglynn's Avatar
sglynn sglynn is offline
Join Date: Mar 2008
Location: Anacortes, WA
Posts: 729

Originally Posted by boearl View Post
Steve, do you have photos? I’m do the magnetometer in the left wing.
My photos are on
Steve Lynn
Flying Phase I
Anacortes, WA
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Old 10-08-2018, 02:16 PM
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sahrens sahrens is offline
Join Date: Jan 2007
Location: Northern CA
Posts: 425

I build a shelf similar to Dan's for a primary and secondary ADAHRS. Here is a link to that process, there are three different entries.

If I were to do it again I would fasten the shelf to the upright supports with screws instead of rivets. That way I could perform maintenance on the ADAHRS by removing the shelf, then removing the ADAHRS units. By riveting it I had to work in that small space of the shelf to attach the ADAHRS.
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Last edited by sahrens : 10-08-2018 at 02:19 PM.
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Old 10-08-2018, 02:39 PM
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Raymo Raymo is offline
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
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Default Simple...

I also have the Dynon adapter with the backup ADAHRS mounted on top.

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Old 10-08-2018, 03:01 PM
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wirejock wirejock is offline
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 3,208
Default ADAHRS shelf

I built a similar shelf to Dan's. Mine is bolted with aluminum and brass hardware to the two J-stringers and the F707 bulkhead. I have a drawing of you would like.
Larry Larson
Estes Park, CO
wirejock at yahoo dot com
Donated 12/27/2018. Plus a little extra.
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I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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Old 10-08-2018, 04:19 PM
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bruceh bruceh is offline
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,157

I built a shelf up high in the fuselage that attached to the stringers for the Dynon ADAHRS unit.

You can pop rivet it in place after you put the top skin on.

I also built a smaller forward shelf to support the tubing.

Use brass or aluminum hardware to mount everything.
Bruce Hill
RV-9A N5771H flown over 600 hours!
APRS Tracking for KJ6YRP and New Flying Blog
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Old 10-08-2018, 05:35 PM
Jpm757 Jpm757 is offline
Join Date: May 2013
Location: Sherman, CT
Posts: 335

If you mount the ADAHARS units towards the top of the fuselage and you are going with a slider, you will get magnetic interference when the canopy is opened. If the magnetomiters are aligned with the canopy closed you will be OK in flight, but ground ops with an open canopy will most likely result in compass error.
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Old 10-08-2018, 07:14 PM
boearl boearl is offline
Join Date: Oct 2013
Location: Dothan, AL
Posts: 55

Thanks Dan.
Ken C.
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Retired Military/Retired Airlines
Been Most Ranks Once, Some Twice
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Founder: SAR (Some Assembly Required).
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Old 10-08-2018, 07:28 PM
jmra72a jmra72a is offline
Join Date: Oct 2010
Location: Kalamazoo, MI
Posts: 13

I mounted the ADAHARS on the top just in front of the bulkhead aft of the baggage compartment wall. I mounted a bracket large enough for two ADAHARS the primary and the back up unit to sit on it. I also used all 316 SS hardware in that area s it wouldn’t effect the magnetometer. My testing showed that the magnetometer is working fine. I am pleased with it. I also installed the Advanced quick build panel with (2) 11” HDX units and the Avidyne IFD 540 to create an IFR panel.
Bill Wilson

Building an RV-7A
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Old 10-08-2018, 07:56 PM
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jcarne jcarne is offline
Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 729

I literally just started doing this tonight. Here is what I came up with. This will go between the two J-stringers like many have done. Probably will use little brass screws to make it removable.

20181008_194240 by Jereme Carne, on Flickr
Jereme Carne
RV-7A Emp. done
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