Today's Message Index:
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1. 04:28 AM - Re: Riblett to Spar Fit (jarheadpilot82)
2. 08:10 AM - Re: FB (TriScout)
3. 09:08 AM - Re: Riblett to Spar Fit (taildrags)
4. 04:51 PM - Re: FB (taildrags)
5. 06:36 PM - Re: Riblett to Spar Fit (Brent Wilson)
Message 1
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| Subject: | Re: Riblett to Spar Fit |
Brent,
Here are the photos of my spacers. The wing is upside down on the saw horses, so
I just took the photos and flipped them.
Oscar,
I purchased the spar blanks from D&E Aircraft out of Lake Worth, FL. The front
spar is 5.683" tall X 0.875" (I think). The rear spar is 4.625" tall. The taller
spars were just a wee bit tight for the rear spar space.
https://www.de-aircraft.com/other.html#04
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Semper Fi,
Terry Hand
Athens, GA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=466625#466625
Attachments:
http://forums.matronics.com//files/spar_spacer_2_155.jpg
http://forums.matronics.com//files/spar_spacer_1_125.jpeg
Message 2
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come to think of it, ever since the newsletter went away, I can't remember if I'm
a current member of BPA anymore. I would subscribe every year because I liked
when the newsletter would appear in the mail
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KLNC
A65-8
N2308C
Slick 4330's
AN Hardware
Airframe 778TT
W72CK-42 Sensenich
Standard Factory GN-1
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=466631#466631
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| Subject: | Re: Riblett to Spar Fit |
Terry; thanks for the pix of your rib-to-spar interface. And just to add one last
bit to what I wrote about spar strength, changing the material from wood to
metal makes a vast change in the strength, other things being equal. Spruce
has a modulus of rupture (or bending strength) of about 9,400 psi whereas (to
use a metal that is familiar to builders) for 6061-T6 aluminum it is 42,000 psi.
If someone were to take the time to carefully route, dado, rabbet, and otherwise
shape a spruce spar into the same dimensions and modified "I" configuration
as your metal spar, not only would it be uselessly flimsy, even properly
restrained it could only carry about 1/5 the bending stress that yours can....
Riblett or no Riblett.
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Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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http://forums.matronics.com/viewtopic.php?p=466632#466632
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By the way: I just noticed that this thread, which began July of 2016 with a post
by Douwe, morphed into a progress update by Ken Bickers of the rebuild of his
damaged Air Camper (and the discussion of how he got his dog attached to the
wall in the picture), is showing that it has had over 2000 views since then.
I guess this is an indication of how much interest there is in expanding the
Pieten-world into social media and friendlier user-group interfaces.
Don't get me wrong, though... I still love it when I open the mailbox and a printed
BPA Newsletter is there. I realize that the days of print newsletters are
rapidly fading and that they are a lot more work than e-newsletters.
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Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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http://forums.matronics.com/viewtopic.php?p=466650#466650
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| Subject: | Re: Riblett to Spar Fit |
Oscar, Terry
Thank you very much for all the information and Terry for the pictures it helps
me a bunch especially since I haven't actually laid eyes on any of this other
than pictures.
Oscar, beautiful job by the Engineering Dept. I actually grasped a lot of that.
I'm just an old mechanic, but I have furthered the career of many an Engineer
in my day so I kind of speak their lingo.
The project I'm looking at trying to pick up has standard spruce spars, 612 Riblett
ribs completed and the center section with the fuel tank completed, so I
would probably just move forward with that design and build spacers to put between
the top of the spar and the rib cap similar to yours Terry.
Again thank you guys for all of your input.
Brent
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=466654#466654
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