(04) Rib Jig / Buttercup ( Mike )

Gussets

Postby planecrazzzy » Sat Dec 22, 2007 2:05 pm

         Hey Guys,
                    Just    when you thought this "thread" couldn't get ANY longer....
I'm doing another "stage" to the ribs....Putting the Gussets on the 3/4 Ribs....
Here's some pic's...

                          Gotta Fly...
                                          Mike & "Jaz" in MN   Shhhh, Jaz is on my lap sleeping....
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Attachments
Full size Ribs 018.jpg
Got these clamps for only $7.99.... (a box of 18)
Full size Ribs 018.jpg (60.05 KiB) Viewed 2892 times
Ribs with Gussets 001.jpg
Ribs with Gussets 001.jpg (60.58 KiB) Viewed 2892 times
Ribs with Gussets 002.jpg
Ribs with Gussets 002.jpg (60 KiB) Viewed 2892 times
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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Postby jerry hey » Tue Apr 08, 2008 6:36 pm

Mike,  I have not figured out this forum yet,  been on it nearly two  minutes.  I am not able to view your photos.  Anyway, I am very interested in Buttercup and have been having difficult contacting Earl.  Could you  send me some basic data:  empty wt, gross,  wing span and length.  Thanks if you do and thanks if you don't have the time.     BTW, my email is [email protected]    If you send photos, perhaps to me personally would be more likely to succeed.  
:D  jerry
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Rib Jig / Buttercup WARNING

Postby planecrazzzy » Sun Apr 20, 2008 4:39 pm

Hey Guys,
                 I noticed before that my ribs had a little "dead spot"

They kind of flattened out from the normal curve.....

At first , I blamed it on myself....Figuring that I should have

soaked the bottom pieces of spruce....

 One day I was looking at the Jig that I used.... and I was looking
at it from an "odd" angle..... I saw the lines curving back and forth
like a SNAKE.....

 Just so happens , that my "pegs" hit "high" on both ends of the
snake....and "Low" in the middle.... Which gave that area a FLAT
spot.....You can't tell unless you look down the rib...

   I "Tried" to take pictures of it.... But because of the angle,
the camera wants to focus up close...

  If you REALLY want to get a GOOD look at it.... Pull out your
Rib pattern , lay it on the table "flat" , an look down the print...
Don't stand back and look at it...put your eye close to the table...

 It's a simple fix....as long as you know it's there....

      Gotta Fly...
                        Mike & "Jaz" in Mn ( With "NEW" Airfoil )
Attachments
Crooked prints and ribs 003.jpg
Crooked prints and ribs 003.jpg (59.3 KiB) Viewed 2869 times
Crooked prints and ribs 002.jpg
Crooked prints and ribs 002.jpg (56.29 KiB) Viewed 2869 times
Crooked prints and ribs 001.jpg
Crooked prints and ribs 001.jpg (57.77 KiB) Viewed 2869 times
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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Re: More Pictures/ progress

Postby JoyceBrown25 » Sun Sep 20, 2009 9:40 pm

Okay, so let's start at the beginning - rib building. I'm wondering about the braces, what was the process you used to get the joints cut just right so they fit nice into the corners. I'm thinking that once I order the material I just get a bunch of sticks and wood that I am to tap into my vast knowlege about building planes and just wittle away until the Buttercup shows up. Ok, it's late and I'm a bit sarcastic. But really - about the joints. Thanks.
Joyce
planecrazzzy wrote:Here's an update.... Need 14 of these 3/4 Ribs....Half way there...
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                      Gotta Fly...
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Postby planecrazzzy » Sun Sep 20, 2009 10:43 pm

I'm not sure what you mean by "Braces".... The "truss" pieces ?

Get the length cut.... hold the piece where it goes... mark it with a pencil... use a disc sander ( see page one )

try to get the pieces to fit good.... if they're too tight.... sand them a pinch more... you don't want too tight...

I made one side fit at a time.... hold it parallel, just above it's location

If they turn out too loose..... make a shorter one out of it......( Make the longer ones first )

 I shaped one at a time... one rib at a time.... They get easier

Note... Make them fit fairly good.... They DON'T have to be perfect... They get gussets covering them...( get them close )

                                Gotta Fly...

We can give some good help here:  
http://groups.yahoo.com/group/Buttercup-STOL/
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Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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Postby JoyceBrown25 » Mon Sep 21, 2009 6:52 am

Yes, this is exactly what I meant. Thanks for the reply and help.
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Re: Rib Jig / Buttercup ( Mike )

Postby planecrazzzy » Tue Apr 13, 2010 10:01 am

Hey Guys,
I haven't seen this one being done.... Most Jigs can't do it...

I put a piece of cap strip in my Rib Jig... bent it to the shape of the Root rib...

Then Penciled it in.... I did this for the Bottom piece too...

Then I drilled holes for "Stainless steel pegs" like the other ones I'm using ( 3/16" round )

and waala.... Root Rib Jig...

I've got Both ribs framed and plywood glued on one side.... I need to check the "Fit" before I close it up with another

piece of mahogany plywood...

Here's some Pix
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. Gotta Fly...
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Attachments
Root Ribs 001.jpg
Root Ribs 002.jpg
More material needed to be added.... The hole needs to be opened "MORE" to clear the Plywood on the spar , and also the wing mount brackets
Root Ribs 003.jpg
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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planecrazzzy
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Re: Rib Jig / Buttercup ( Mike )

Postby planecrazzzy » Tue Apr 13, 2010 10:07 am

After cutting the holes bigger with my router ( mounted on a table )

I got the ribs to slip into place.... The ends of these spars can move ( slightly )... So before I epoxy these ribs in place,

I will be putting the wings back on the Fuselage...and I'll leave it like that until the epoxy dries...

With the tight tolerances , it's the only way I can be sure...
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Gotta Fly...
Attachments
Root Ribs 004.jpg
Root Ribs 005.jpg
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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planecrazzzy
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Re: Rib Jig / Buttercup ( Mike )

Postby planecrazzzy » Thu Apr 15, 2010 9:30 pm

Hey Guys,
After "Fitting" the Root Rib onto the spars.... notching out the area for the Plywood and metal Wing mount

I clamped the Root Rib onto the fuselage.... I could see I need to grind the shape of the rib to fit the fuselage better...

But I also needed to add more cap strip , before I grind it...

Gotta Fly...
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Attachments
Root Ribs 006.jpg
You can see the area I need to grind... it's on the back half of the Rib...
Root Ribs 007.jpg
Root Ribs 008.jpg
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
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Re: Rib Jig / Buttercup ( Mike )

Postby planecrazzzy » Tue Oct 19, 2010 7:10 pm

Just catching up.... After everything looked good , I then put the plywood skin on the other side of the root rib...sealing it.
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Then after it was cleaned up... I epoxied it onto the spars , and put triangle pieces for strength...

Now the spars are held in place good...
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Gotta Fly...
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Attachments
Root Ribs 013.jpg
Root Ribs 012.jpg
Root Ribs 009.jpg
Sometimes you just have to take the leap
and build your wings on the way down...
                Gotta Fly...
User avatar
planecrazzzy
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