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toaster73(at)embarqmail.c
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 Posted: Sun Mar 16, 2008 5:51 pm Post subject: Garmin Avionics stack question |
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In planning my panel , I will have a garmin 430, sl30, gtx327, and gma 340, looking at the lengths of everything if I stack them in said order top to bottom I will be able to see the back of the tubes on each unit looking up from the floor. Would this be ok. I am not use to any particular order. Plus having the 430 on top puts its sreen up where I can see it. Just thought this arrangment might be handy down the road if I have maintenance issues looking working under/behind the panel. Thoughts??
Chris Lucas
#40072
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jesse(at)saintaviation.co
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| Posted: Sun Mar 16, 2008 6:19 pm Post subject: Garmin Avionics stack question |
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First of all, I may recommend one of the PMA audio panels over the Garmin, but they are a little more expensive. Second, while it is true that the audio panel is shorter from front to back, the shape of the tray is very conducive to putting it at the top of the stack. With the way the wires come out of it, there won't be much (if anything) you can do on it from underneath the panel. The best way to access them, IMHO is to leave a little bit of a service loop in the back so you can pull the stack out of the panel and make any changes. The main thing I have seen the need to do from under the panel is to remove and replace antenna wires, which would work whether you put the 430 at the top or the 340 at the top. FWIW, working on your back under the panel is extremely uncomfortable and difficult. Planning a way to access things from the front, especially by making the panel in more than one piece so you can pull out one part at a time to work behind others, is my preferred way to install.
Though possibly a little bit unconventional, I prefer to wire the radio stack instruments together and use aluminum angle to hold them together, and then use nutplates and screws to hold them to the instrument panel. I prefer this because it makes it a lot easier to remove the rest of the panel to allow work to be done on the radio stack or things/wires in the sub-panel area.
As John Cox always says, part of the building process is thinking through and planning for the maintenance procedures, which is exactly what you are doing. In summary, planning a way to access things from the front would be my recommendation instead of planning to work on them from underneath.
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
Cell: 352-427-0285
Fax: 815-377-3694
On Mar 16, 2008, at 9:48 PM, Chris wrote:
| Quote: | In planning my panel , I will have a garmin 430, sl30, gtx327, and gma 340, looking at the lengths of everything if I stack them in said order top to bottom I will be able to see the back of the tubes on each unit looking up from the floor. Would this be ok. I am not use to any particular order. Plus having the 430 on top puts its sreen up where I can see it. Just thought this arrangment might be handy down the road if I have maintenance issues looking working under/behind the panel. Thoughts??
Chris Lucas
#40072
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Tim Olson
Joined: 25 Jan 2007
Posts: 2879
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| Posted: Sun Mar 16, 2008 6:34 pm Post subject: Garmin Avionics stack question |
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You'll probably want the shortest on top if you want a center stack,
because of the center rib. Other than that, I could work if
you mount it off center.
Personally, I'd go for a PS Engineering audio panel before the GMA340.
They've got about the best support there is out there.
Tim Olson - RV-10 N104CD - Flying
do not archive
Chris wrote:
| Quote: | In planning my panel , I will have a garmin 430, sl30, gtx327, and gma
340, looking at the lengths of everything if I stack them in said order
top to bottom I will be able to see the back of the tubes on each unit
looking up from the floor. Would this be ok. I am not use to any
particular order. Plus having the 430 on top puts its sreen up where I
can see it. Just thought this arrangment might be handy down the road if
I have maintenance issues looking working under/behind the panel. Thoughts??
Chris Lucas
#40072
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ron.mcgann(at)baesystems.
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| Posted: Sun Mar 16, 2008 6:49 pm Post subject: Garmin Avionics stack question |
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Hey Chris,
I have the same stack as yourself. My layout has the 340 on top, 430, sl30 and the GTX-327. Here is what I found during install:
1. the 430 and the SL-30 extend beyond the subpanel and require a penetration. Subsequent routing of the 430/sl-30 loom to the 340/327 and panel instruments is a PITA.
2. although the 327 fits in the panel/subpanel gap, I still needed to install a 90deg BNC connector to the antenna. Had the 327 not been on the bottom, this would have been a pain.
3. I have the panel divided into Pilot/stack/copilot segments as suggested by Jesse and it works well.
4. I have a sufficiently large service loop to allow the stack segment to be brought forward for access to the connectors.
5. My power and EFIS/avionics (3xGRT and EIS, CDI, T&B, A/P etc) data looms are laid out on the aft side of the subpanel (ie facing the pilot) for easy access.
Planning the panel wiring for ease of maintenance is something that takes time, but it is well worth it when you find that you omitted a connection during final checkout!
cheers,
Ron
[quote] From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Chris
Sent: Monday, 17 March 2008 12:18 PM
To: rv10-list(at)matronics.com
Subject: Garmin Avionics stack question
In planning my panel , I will have a garmin 430, sl30, gtx327, and gma 340, looking at the lengths of everything if I stack them in said order top to bottom I will be able to see the back of the tubes on each unit looking up from the floor. Would this be ok. I am not use to any particular order. Plus having the 430 on top puts its sreen up where I can see it. Just thought this arrangment might be handy down the road if I have maintenance issues looking working under/behind the panel. Thoughts??
Chris Lucas
#40072
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rene(at)felker.com
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| Posted: Sun Mar 16, 2008 6:51 pm Post subject: Garmin Avionics stack question |
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Chris, Stein built my panel using his three piece panel that is an inch or so taller. I have a PS engineering audio panel, DVD/Radio, 430, sl30, 327 and GRT EIS all in one stack. I agree with Jesse, no way I want to do any work from under the panel. I had to do some rewiring myself and even being able to pull the center section out a ways, it was still difficult. From under the panel it was impossible. If I remember right the SL30 is the deepest item…..center rib considerations.
Rene'
801-721-6080
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wcurtis(at)nerv10.com
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| Posted: Sun Mar 16, 2008 7:03 pm Post subject: Garmin Avionics stack question |
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I'd think you would want the shortest on the bottom since you only have 9.5" of depth before you have to cut into the secondary panel. Having the longer radios on the bottom will require you cut into the secondary panel too close to the bottom edge reducing it's strength. Cutting the secondary panel 2" from the bottom makes the bottom 1 1/4" of the panel only usable for radios shorter than 9.5".
Also, Jessie, I understand using nutplates in the angle makes removal of the trays easier. Certainly this is better than the screws and nylon lock-nut that I've seen on many installations. Whenever those trays using the lock-nuts have to be removed, reinstallation will be a royal pain. Short of using something like Radiorax, the standard convention is to use Floating Clipnuts. Clipnuts even came with my PS-8000B audio panel.
Because the audio panel is so short (6"), I've actually moved it to the left of the stack so that I would have to cut less of the secondary panel.
http://nerv10.com/wcurtis/91Panel/index.html
Here is a picture of the forward fuselage secondary panel modifications formy instruments.
http://nerv10.com/wcurtis/08fuselage/fuselage31q.html
William
http://nerv10.com/wcurtis/
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jesse(at)saintaviation.co
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| Posted: Mon Mar 17, 2008 3:21 am Post subject: Garmin Avionics stack question |
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William, nice sub-panel work. One thing that I have learned in my
work on the -10 is that the sub-panel can be your best friend. There
are a lot of items that you need to remote-mount (avionics cooling
fan, some sensors, altitude encoder, weather receiver, etc.) for which
the sub-panel can be used. It is a fantastic way to get a good
mounting place without having to go between the sub-panel and the
firewall, which is very hard to get to even with a big hole in the sub-
panel. For those who haven't gotten there yet, it would be wise to
list out all of the things that mount somewhere back there and to plan
where you will mount them before removing too much of your sub-panel.
do not archive
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
On Mar 16, 2008, at 11:13 PM, William Curtis wrote:
[quote]
I'd think you would want the shortest on the bottom since you only
have 9.5" of depth before you have to cut into the secondary panel.
Having the longer radios on the bottom will require you cut into the
secondary panel too close to the bottom edge reducing it's
strength. Cutting the secondary panel 2" from the bottom makes the
bottom 1 1/4" of the panel only usable for radios shorter than 9.5".
Also, Jessie, I understand using nutplates in the angle makes
removal of the trays easier. Certainly this is better than the
screws and nylon lock-nut that I've seen on many installations.
Whenever those trays using the lock-nuts have to be removed,
reinstallation will be a royal pain. Short of using something like
Radiorax, the standard convention is to use Floating Clipnuts.
Clipnuts even came with my PS-8000B audio panel.
Because the audio panel is so short (6"), I've actually moved it to
the left of the stack so that I would have to cut less of the
secondary panel.
http://nerv10.com/wcurtis/91Panel/index.html
Here is a picture of the forward fuselage secondary panel
modifications formy instruments.
http://nerv10.com/wcurtis/08fuselage/fuselage31q.html
William
http://nerv10.com/wcurtis/
------
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http://www.matronics.com/Navigator?RV10-List |
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