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  #1  
Old 07-24-2018, 02:36 PM
AviatorJ AviatorJ is offline
 
Join Date: Feb 2015
Location: Oklahoma City
Posts: 670
Default Behind the panel avionics placement

I need some mounting or arrangement suggestion, ie mounting locations and/or brackets I can make. So far I have only had to cut a single hole into my subpanel for my GTN 650. Decided to jump on in and go ahead and get those trays and the wiring harness into the plane.

So here's what I have shown in the picture with a bit of painters tape holding everything in an approximate place I think would accommodate space and with my Stein harness.



Not sure if the picture shows it but I cut a number of scrap angle pieces that I have the VPX and GTR 20 sitting on. This is just to have a place to put things on, however I can easily make these into some type of permanent mounting solution.

- For the VPX, my thought is to use the existing brackets and bolt one to the subpanel flange and make a little extension piece to cover the gap aft to panel flange. Locate it somewhere in the middle that's easy to get to and for maintenance I can remove the center console cover and get to it fairly easy without having to take out a PFD or MFD.

- The GTR 20 I would use those angels and mount then on the panel/subpanel flange flat side up. Then I can just bolt the GTR 20 in... or do it opposite and bolt the GTR 20 up onto the 'rails'.

- I would mount the IBBS a bit higher than it's shown in the picture, but this location should be able to accommodate the harness lead. Does it make more sense to but this on the back side of the subpanel?

- The GEA24/29 need to be close because of the harness. Thought about putting the 29 behind the subpanel but don't want to strain the wiring harness. It's still an option though.

- GD40 will work out fine where I have it. Easiest of all to install it looks like.

- GTX45R you can barely see, I'll just figure out a way with angles and mount it similar to how I'm mounting the GTR 20.

- Fuse box can go on the far left, or the far right. Just want to be able to get to it from underneath. Do not want to take out avionics to get to this thing.

- The grounding tab would work nice somewhere in the middle like where I have it.
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Last edited by AviatorJ : 07-26-2018 at 06:01 AM.
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  #2  
Old 07-24-2018, 03:21 PM
Electrogunner Electrogunner is offline
 
Join Date: Aug 2016
Location: Quarryville ,pa
Posts: 304
Default Space

Can you utilize the space behind the right removable panel? I installed my ground tabs on the right side and made a hinged drop down for my fuse blocks and power converter also on the right side.
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  #3  
Old 07-24-2018, 03:41 PM
AviatorJ AviatorJ is offline
 
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Location: Oklahoma City
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Default

Quote:
Originally Posted by Electrogunner View Post
Can you utilize the space behind the right removable panel? I installed my ground tabs on the right side and made a hinged drop down for my fuse blocks and power converter also on the right side.
I can, depending on how I bracket the GTX 45R I might have all that room. How does a hinged bracket for the fuse panel work?
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  #4  
Old 07-24-2018, 05:01 PM
DRMA DRMA is offline
 
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Default

Be careful that you leave space to remove the GTX 45R. I’m told you need a lot of space to slide the 45R out of its mounting bracket.
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  #5  
Old 07-24-2018, 05:21 PM
Electrogunner Electrogunner is offline
 
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Default Hinge

Quote:
Originally Posted by AviatorJ View Post
I can, depending on how I bracket the GTX 45R I might have all that room. How does a hinged bracket for the fuse panel work?
I installed a section of hinge on the sub panel and 2 quick release latches( actually used the ones Vans supplies for the oil door). Cut a plate of aluminum to fit between the hinge and the bottom panel support. I can just reach down and turn the latches and the panel swings down. PM me your email and I'll send you pics how I did mine. I have quite a bit tucked in there on the right side. Not sure how to post pics on here.
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  #6  
Old 07-24-2018, 06:18 PM
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az_gila az_gila is offline
 
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Smile

I used that VPX position, but had to carefully measure for my planned Skyview HDX unit.

Depending on the depth of your EFIS at it's lower edge there may be physical interference.

IIRC the non-HDX Skyviews could have clearance issues.
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  #7  
Old 07-25-2018, 08:19 AM
AviatorJ AviatorJ is offline
 
Join Date: Feb 2015
Location: Oklahoma City
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Default

Quote:
Originally Posted by DRMA View Post
Be careful that you leave space to remove the GTX 45R. Iím told you need a lot of space to slide the 45R out of its mounting bracket.
It's about as deep as the GTN 650. If it was a non-remote version a great place would have been just under the GTN650 and I could of made the subpanel cutout bigger.

What may work is using that area to the right and mounting it horizontal close enough to the right side that I can get to the wiring and antenna connection but with enough room on the left that I can pull the unit out if I need to. I have to mess with my bracket idea but the thought is to essentially made two ear type tabs that I can mount in between the panel and subpanel letting me secure the rack with two screws. Then have a lateral bracket that will hold the back of the rack up. Won't have that screwed down but it will support it enough to keep stress off the harness or front ears.

Then the VPX which will be the unit to the left, I'll see if I can leave enough distance to get the module in and out... if I can't then I'll look at mounting the VPX essentially upside down which should allow enough space to slide the GTX 45R over the 'top' of the VPX to get it in and out.


Quote:
Originally Posted by Electrogunner View Post
I installed a section of hinge on the sub panel and 2 quick release latches( actually used the ones Vans supplies for the oil door). Cut a plate of aluminum to fit between the hinge and the bottom panel support. I can just reach down and turn the latches and the panel swings down. PM me your email and I'll send you pics how I did mine. I have quite a bit tucked in there on the right side. Not sure how to post pics on here.
I'll post them for you-







This is a really cool idea, especially if not using a GTX and have a bunch of fuse blocks that take up mounting space. I'm big on being able to get to things for maintenance and this gives some great access.


Quote:
Originally Posted by az_gila View Post
I used that VPX position, but had to carefully measure for my planned Skyview HDX unit.

Depending on the depth of your EFIS at it's lower edge there may be physical interference.

IIRC the non-HDX Skyviews could have clearance issues.
The G3X's are about an 1.5" deep. I measured that out initially to ensure no conflicts. However if I mount the VPX 'upside down' like I mentioned to accommodate being able to pull out the GTX 45R then it puts the unit below the waterline per se and all that is open.
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  #8  
Old 08-02-2018, 03:02 PM
AviatorJ AviatorJ is offline
 
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Location: Oklahoma City
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Default

Wanted to show what I ended up with. There were a lot of decisions on the fly, some solutions worked through and then redone because I wasn't happy with the result.

The IBBS is above and behind the VPX. I can't mount the GSU on the G3X panel like I originally planned to so it's going to go on that brace to the left. I did put the ground on the right and the GEA 24 is on the subpanel where you can see those bolts.


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  #9  
Old 08-02-2018, 04:27 PM
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Walt Walt is online now
 
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Default

I often mount the xpdr behind the aft bulkhead, benefit is this allows me to put the antenna on the aft fuse and keep the xpdr cable short, also allows easy access.
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  #10  
Old 08-02-2018, 06:57 PM
AviatorJ AviatorJ is offline
 
Join Date: Feb 2015
Location: Oklahoma City
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Default

I didn't build my own harness so I would have had to thought about the transponder in the back earlier. Good idea though, I'll do that on my RV-8 build!

Mounting the GSU 25 on the little left bracket once everything in was a real challenge. I got it... well 3 out of the 4 screws at least. I don't think it's going anywhere.



Now onto sorting through the wires and figuring out where to put adels, ziptie bases, ect..
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