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  #11  
Old 03-12-2018, 12:21 PM
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rleffler rleffler is offline
 
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Quote:
Originally Posted by az_gila View Post
If I read your blog pictures correctly, the 1/16 Fibrerfrax is sandwiched between the two skins (SS and original belly aluminum) by the same rivets that attach the skins to the fuselage ribs.

Wouldn't having this layer of Fiberfrax in the assembly screw up the structural integrity of the skin to rib riveted joint?
I don't know how either Mike or Kyle assembled theirs, but I would not use the rivets in the plans to ensure no compromise to structural integrity. I would off set rivets lines dedicated to the stainless plate.
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  #12  
Old 03-12-2018, 01:10 PM
Kyle Boatright Kyle Boatright is online now
 
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Quote:
Originally Posted by rleffler View Post
I don't know how either Mike or Kyle assembled theirs, but I would not use the rivets in the plans to ensure no compromise to structural integrity. I would off set rivets lines dedicated to the stainless plate.
That's what I did. The primary structure is per plans. The pop rivets for the overlay are just there to attach the stainless sheet.
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  #13  
Old 03-12-2018, 03:06 PM
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My belly shield does, in fact, use the rivets that attach the ribs to the bottom skin. I used rivets slightly longer than the ones called for by the plans, in order to get the proper diameter/height on the shop head.

Keep in mind, that 1) my belly shield is not the full length of the bottom skin, only the first 18 inches or so, 2) the Fiberfrax crushes a little at the point of attachment, leaving very little thickness at the rivet lines and 3) the SS sheet would add a bit of tensile capacity to the bottom skin.

It would probably have been better to use separate/extra rivets to secure the SS sheet/FF to the belly (I thought of that for my firewall), but, for my small belly shield, I didn't do it that way.
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  #14  
Old 03-12-2018, 07:08 PM
jeffwhip jeffwhip is offline
 
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Quote:
Originally Posted by DanH View Post
Do this ^^^^^
Dan,
Do you have any pictures of what that looks like?

Jeff
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  #15  
Old 03-12-2018, 09:19 PM
Kyle Boatright Kyle Boatright is online now
 
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Quote:
Originally Posted by jeffwhip View Post
Dan,
Do you have any pictures of what that looks like?

Jeff
Here you go (I think)...

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Last edited by Kyle Boatright : 03-12-2018 at 09:38 PM.
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  #16  
Old 03-17-2018, 04:33 PM
jeffwhip jeffwhip is offline
 
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Thanks! That's what I'm looking for.
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  #17  
Old 03-17-2018, 04:53 PM
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If it was me, I'd want to be sure the underlying skin was carefully prepared and corrosion proofed before riveting a plate on. Once you install it inspection will become impossible, and there is a good chances of moisture getting in between the 2 skins and with the dissimilar metals it could be a problem down the road. It would be more work but maybe worthwhile if you're building to use screw/nutplates to intall the sandwich.
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  #18  
Old 03-17-2018, 05:00 PM
Kyle Boatright Kyle Boatright is online now
 
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Quote:
Originally Posted by Walt View Post
If it was me, I'd want to be sure the underlying skin was carefully prepared and corrosion proofed before riveting a plate on. Once you install it inspection will become impossible, and there is a good chances of moisture getting in between the 2 skins and with the dissimilar metals it could be a problem down the road. It would be more work but maybe worthwhile if you're building to use screw/nutplates to intall the sandwich.
Unless you start your -10 fuselage with this in mind, retrofitting nutplates under the floorboards will be a bear. That said, yes, do put a coat of epoxy or zinc chromate on the aluminum to protect it.
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  #19  
Old 03-18-2018, 08:46 AM
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Weasel Weasel is offline
 
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Default Another one

Quote:
Originally Posted by jeffwhip View Post
Dan,
Do you have any pictures of what that looks like?

Jeff

If I remember used 0.005" SS


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  #20  
Old 03-18-2018, 12:27 PM
rdrcrmatt rdrcrmatt is offline
 
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Stupid question, what's the purpose here?

I can only think it is to insulate from the heat of the exhaust.
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