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  #11  
Old 01-13-2013, 08:40 PM
azonic75 azonic75 is offline
 
Join Date: Dec 2010
Location: Salem, OR
Posts: 112
Default Back of similar panel

This is in my RV8a



Here's the back looking from the right, bare wire for the GDL-39 can be seen going into the MFD. I'm mounting the GDL on the back of the far right side of the panel. This way I can reach under and sync with an ipad if I want and also remove it if I want it in another plane



Here is looking from the left. GX pilot/GTN/audio panel and radio stack. Tight fit but it works



This is looking towards the tail and shows the remote mounted transponder, as well and the magnetometer position



Here's the panel powered up for the first time this evening

Kai
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  #12  
Old 01-13-2013, 08:46 PM
rwhittier rwhittier is offline
 
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Location: Glendale, AZ
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Quote:
Originally Posted by Mark Burns View Post
Bob,
Are your serious about the Cirrus? I've never seen behind a certified aircraft panel that was remotely close to Randy's.
Someone snap a photo under the panel of a Cirrus for us.

Mark
No need to snap a picture behind a Cirrus panel. I own one and work on many. They are NOT even remotely close to that beautiful wiring job. In fact compared that picture I would say they look positively slovenly.
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  #13  
Old 01-13-2013, 10:06 PM
Captain Avgas Captain Avgas is offline
 
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Location: Melbourne, Australia
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Quote:
Originally Posted by Mark Burns View Post
Bob,
Are your serious about the Cirrus? I've never seen behind a certified aircraft panel that was remotely close to Randy's.
Someone snap a photo under the panel of a Cirrus for us.

Mark
Well, Roger Whittier says the Cirrus wiring is not as good but I took a long look at a brand new SR22 a few months back and the wiring harness was VERY slick. Maybe they've improved.

Randy's wiring is lovely, but if you get Stein or Stark, or any good professional, to fully wire your aircraft you'll get pretty much the same thing.

I've attached a photo I've posted before of the wiring on a radio stack for a Cessna 206. It's nice too. It's a good standard, but no more than might be expected from a professional who knows what the final product is going to look like before he starts.


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Last edited by Captain Avgas : 01-13-2013 at 10:24 PM.
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  #14  
Old 01-14-2013, 05:55 AM
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jthocker jthocker is offline
 
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Location: Cincinnati, Ohio
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[quote=azonic75;734314]This is in my RV8a



Kai,

A heads up for you and anyone else using the GSU 73 mount from Avionics Systems in an RV8 panel.

I have found that when using that mount, the bottom of the instrument panel needs to be "tied" to something forward. Otherwise, the weight of the GSU 73 causes the panel to flex. This manifests itself in the GSU 73 unable to calibrate the magnetometer, or pass the engine run up test. Or, if you happen to get past those steps, you might lose your attitude while flying formation with another G3X equipped RV8 when you both hit the same bump! Both planes had the GSU 73 mounted to an "unstiffened" panel.
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  #15  
Old 01-14-2013, 06:08 AM
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f1rocket f1rocket is offline
 
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Location: Martinsville, IN
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Default

Geez guys, thanks for the comments. It's not that hard, really. Here's a couple of tips that I've learned over the years.

1. As it was said before, have a plan. Know where everything is and will be.
2. Start separating wires into major bundles early down in the tunnel like Radio, Power, Ground, etc. Within those groups, have sub-bundles like Nav, Comm, GPS, etc. I like to keep the power wires away from the radio wires as early as possible to cut down on interference.
3. I wire from the back to the front. I leave behind the panel to last. Leave all the tales long so you can route wires where you want to, not where you have to.
4. Once everything is behind the panel, wire up one device at a time and secure the bundles appropriately.

I'm sure I'm leaving out a few things, but that's the big picture. You can do it just like I've done it. It doesn't take any extraordinary skill or anything, just some patience.
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  #16  
Old 01-14-2013, 08:12 AM
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GLPalinkas GLPalinkas is offline
 
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Location: Venice, Fl
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Default Awesome

Randy, Your wiring is AWESOME.

I worked on F-4j's as a "behind the panel" avionics/missile guidance and fire control tech in VMFA-334. You would think that my behind the panel looks like yours. However, it does not!! My behind panel looks a lot more like Van's demo aircraft panels. If you have ever taken a photo "under and behind" a Van's panel you will see it is a more typical "spaghetti wiring" job than most would think. (Sorry, I can't find a photo I took under a Van's panel)

YMMV but Just info for those that are intimidated by Randy's awesome wiring job. Make it neat as you can so that you can trace problems. You don't have to make it looks like Randy's, especially for those that are "electrically challenged".

ps... and yes, those are big service loops that can be pulled thru my easily removable front access panels. The panel is a beautifully sculptured piece from Laird Owens and no, I don't know if he still makes them.



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Last edited by GLPalinkas : 01-14-2013 at 04:50 PM. Reason: added text
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  #17  
Old 01-14-2013, 08:34 AM
azonic75 azonic75 is offline
 
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Location: Salem, OR
Posts: 112
Default Panel flex

Jon,

Good to get this feed back, how did you go about fixing this? Would tying the back end of the bracket to the forward baggage bulkhead be sufficient?

Kai
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  #18  
Old 01-14-2013, 08:37 AM
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Brantel Brantel is offline
 
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Location: Newport, TN
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Like Gary says, behind the panel does not have to look like Randy's work to be safe and functional. The typical rental fleet sure does not look anywhere near Randy's example of fine work.

It is much easier when you have wide open access to everything to make it more like Randy's example. Closed up airplanes and many upgrades can leave it looking messy.

I for one went thru several upgrades and I vowed to basically start over with this new upgrade. I don't however have the access that I had the first go round so while it won't end up looking like Randy's, it will be functional and safe and better than it was after all the prior upgrades.

The important things for me are:
  • Overcurrent Protection is Priority #1!
  • Keep the power wire groups separate from the data lines
  • Leave service loops
  • Label everything
  • Provide strain relief
  • Properly secure wire bundles
  • Protect wires from rubbing against edges or corners
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Last edited by Brantel : 01-14-2013 at 08:43 AM.
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  #19  
Old 01-14-2013, 11:48 AM
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FuturPilot FuturPilot is offline
 
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Location: Madison, WI
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Default Wiring

After 20 years in Air Force, most recently working F16's, I don't think I would run wires any different. Now the RV will not pull as many G's as the 16, but if you think about doing any aerobatics and pulling some, you will seriously think about binding wires together as well as to bulkhear, stringer, or some other solid point. Although not heavy wire will move under stress (G's) and this can lead to chaffing as well as breaking. Just my two cents
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  #20  
Old 01-14-2013, 12:30 PM
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Guy Prevost Guy Prevost is offline
 
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I could do better now, but here's mine:
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