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woxofswa
Joined: 12 Aug 2008
Posts: 349
Location: AZ
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 Posted: Mon Oct 06, 2008 9:07 am Post subject: upper fwd fuselage rib mods |
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I am building my upper fwd fuselage assembly. I know some folks have modified the ribs for more clearance. Van's recommends waiting until I have my avionics picked out and at hand before modifying, but it seems much easier to do now.
I am planning a normal EFIS stack either GRT or Dynon.
I was thinking of using the angle left over from the skin bending angles to mod the ribs.
Should I clear out as much room as I can now or wait until later?
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Myron Nelson
Mesa, AZ
Flew May 10 2014 |
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indigoonlatigo(at)msn.com
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| Posted: Mon Oct 06, 2008 9:36 am Post subject: upper fwd fuselage rib mods |
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Having just completed this with my panel all wired and together C I don't see how you can do anything until you have the instruments mounted in the panel. Not only do you have to worry about the actual device(s) C but also the connectors coming out of the back of the unit(s).
If you want to do it twice C you can do it now and then again later.
I'd wait.
John G. 409
| Quote: | Subject: upper fwd fuselage rib mods
From: woxof(at)aol.com
Date: Mon C 6 Oct 2008 10:07:19 -0700
To: rv10-list(at)matronics.com
--> RV10-List message posted by: "woxofswa" <woxof(at)aol.com>
I am building my upper fwd fuselage assembly. I know some folks have modified the ribs for more clearance. Van's recommends waiting until I have my avionics picked out and at hand before modifying C but it seems much easier to do now.
I am planning a normal EFIS stack either GRT or Dynon.
I was thinking of using the angle left over from the skin bending angles to mod the ribs.
Should I clear out as much room as I can now or wait until later?
--------
Myron Nelson
Mesa C AZ
Emp completed C legacy build fuse in progress
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=207559#207559
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orchidman
Joined: 10 Jul 2006
Posts: 277
Location: Oklahoma City - KRCE
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| Posted: Mon Oct 06, 2008 9:59 am Post subject: Re: upper fwd fuselage rib mods |
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| woxofswa wrote: | I am building my upper fwd fuselage assembly. I know some folks have modified the ribs for more clearance. Van's recommends waiting until I have my avionics picked out and at hand before modifying, but it seems much easier to do now.
I am planning a normal EFIS stack either GRT or Dynon.
I was thinking of using the angle left over from the skin bending angles to mod the ribs.
Should I clear out as much room as I can now or wait until later? |
Get your instruments or exact mock up of them, lay out your panel and then figure out how much you will need to trim the ribs.
As woxofswa notes, make sure you include the connectors, both electrical and pitot/static that might be required.
Also, the top skin is the LAST thing you want to install. Get your wiring complete before you put the top on followed by the wind screen. I am just finishing up the wiring and working on the doors. After I finish them, I will put the gear on, and then the engine. Some where in that stage, I will put the top cover on, windshield and finish the cowling.
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Gary Blankenbiller
RV10 - # 40674
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wcurtis(at)nerv10.com
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| Posted: Mon Oct 06, 2008 1:56 pm Post subject: upper fwd fuselage rib mods |
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I will offer that planes constructed such that wiring and avionics done prior to close-up, without good consideration to maintenance, troubleshooting and upgrades after construction, will be maintenance and upgrade nightmares. One way to reduce the risk of this is to put a basic ground work in place prior to close-up and then perform these functions after closeup. Avionics radio racks are relatively standard and you can find the exact measurements for each possible device in the installation manuals. This is why you can put an avionics device in an aircraft manufactured 40 years ago and not have to "rebuild" the aircraft--in most cases. The secondary benefit is that it allows you to wait until the last possible moment before you purchase your avionics.
My top skin and lid is on. All electrical work was done after this and in such a ways that I can re-do at any time without any extraordinary methods. I have standard radio rack rails, front and rear that are 6.375" wide to allow for most radio racks and associated clip-nuts. Also, I see a lot of builders using nyloc nuts to hold their radio racks in place. These are easy enough to install when things are open but will be very difficult to remove and replace when the panel is in place. The standard for holding radio racks in place on certified aircraft is to use floating clip-nuts. This is but one of those minor changes that can make a big difference for maintenance and post construction installations.
If you construct your aircraft in such a way that system installations can only be done during construction, you better hope the installation is perfect and you will never want to upgrade. Consider not only the installation, but also post construction maintenance and upgrades.
http://nerv10.com/wcurtis/08fuselage/fuselage41m.html
William
http://nerv10.com/wcurtis/
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Albert Gardner
Joined: 10 Jan 2006
Posts: 455
Location: Yuma, AZ
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| Posted: Mon Oct 06, 2008 10:39 pm Post subject: upper fwd fuselage rib mods |
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You are probably aware that Van would prefer that those ribs not be modified
although many builders have found it necessary to do so. I would not hasten
that step though-after you get your avionics you may find altering the
position even slightly can change the amount of modification necessary. And
as others have pointed out you need clearance for more than just the tray.
Albert Gardner
Yuma, AZ
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