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Gussets

PostPosted: Sat Dec 22, 2007 2:05 pm
by planecrazzzy
         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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PostPosted: Tue Apr 08, 2008 6:36 pm
by jerry hey
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

Rib Jig / Buttercup WARNING

PostPosted: Sun Apr 20, 2008 4:39 pm
by planecrazzzy
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 )

Re: More Pictures/ progress

PostPosted: Sun Sep 20, 2009 9:40 pm
by JoyceBrown25
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...

PostPosted: Sun Sep 20, 2009 10:43 pm
by planecrazzzy
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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PostPosted: Mon Sep 21, 2009 6:52 am
by JoyceBrown25
Yes, this is exactly what I meant. Thanks for the reply and help.

Re: Rib Jig / Buttercup ( Mike )

PostPosted: Tue Apr 13, 2010 10:01 am
by planecrazzzy
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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Re: Rib Jig / Buttercup ( Mike )

PostPosted: Tue Apr 13, 2010 10:07 am
by planecrazzzy
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...

Re: Rib Jig / Buttercup ( Mike )

PostPosted: Thu Apr 15, 2010 9:30 pm
by planecrazzzy
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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Re: Rib Jig / Buttercup ( Mike )

PostPosted: Tue Oct 19, 2010 7:10 pm
by planecrazzzy
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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