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  #41  
Old 03-26-2013, 08:16 PM
KatieB's Avatar
KatieB KatieB is offline
 
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Location: Shelbyville, TN (KSYI)
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Silly engineer, even a girl can use a fly cutter!
http://plus.google.com/app/basic/pho...gfud9&sview=20

And the girl even finished the ribs with all fingers, teeth and eyeballs intact.
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But RV8 3301 is in the works.
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  #42  
Old 03-27-2013, 05:41 AM
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Michael White Michael White is offline
 
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Location: Cartersville, Georgia KVPC
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Quote:
Originally Posted by KatieB View Post
Silly engineer, even a girl can use a fly cutter!
http://plus.google.com/app/basic/pho...gfud9&sview=20

And the girl even finished the ribs with all fingers, teeth and eyeballs intact.

That's because the girl was smart enough to use a big honkin' clamp to hold things in place.
Some people aren't that smart...
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  #43  
Old 03-27-2013, 08:08 AM
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KatieB KatieB is offline
 
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Quote:
Originally Posted by Michael White View Post
That's because the girl was smart enough to use a big honkin' clamp to hold things in place.
Some people aren't that smart...
TWO big honkin' clamps, or else I'd probably have an assortment of eyepatches to match my purse & shoes.
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Katie Bosman Krotje
Sold my RV-3B project...
Build log
But RV8 3301 is in the works.
Jabiru J200 flying
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  #44  
Old 05-16-2013, 12:36 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
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Default Rivets Between Rear Spar & Ribs

It wasn't clear to me how many rivets two of the inboard ribs needed at the rear spar, so I asked the Mothership. They sent me this picture. The red dots are the additional rivets.



Dave
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  #45  
Old 07-23-2013, 10:36 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
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Default Wing's Inspection Hole Parts

I drilled my wing's bottom main skins to the spar and ribs. The plan was that the inspection hole covers and doublers would be done afterwards. Wrong! The W-322PP covers, some of the very few pre-punched parts, have fasteners which go through the front spar flange, and once I'd drilled the flange for the skin in those areas, the holes no longer lined up.

Another possible gotcha is the pitot tube.

So on your wings, figure out those details BEFORE drilling the bottom skins to the front spar, at least in those areas.

Dave
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  #46  
Old 07-31-2013, 08:48 PM
David Paule David Paule is offline
 
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Location: Boulder, CO
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Default Wing Inspection Part Dimensions

Refer to Dwg 5, and look at the W-335A and W-336A doublers. See how the attachment rivets are fairly close to the inside edge of the skin? And the K1100-08 plate nuts are close to the inside edge of the doubler?

I followed these dimensions and now that I'm done with them, I think that the 3/4 inch space ought to be where the plate nuts are, and the 1/2 inch space ought to be where the rivets are. Of course this means that the access cover will need to be 1/2 inch wider and 1/4 inch deeper, or the doublers be made smaller.

The way I've got it right now, the plate nuts are right at the very edge of the doubler, and I think some of them might even overhang inside the access space just a hair.

Here's what one of the doublers looks like.



This one has the pass-through hole for the pitot tube, which accounts for the ear on the left. Otherwise it's to the plans.

Dave
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  #47  
Old 08-11-2013, 08:57 PM
David Paule David Paule is offline
 
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Location: Boulder, CO
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Default Leading Edge Top Or Bottom?

When I took the leading edge skins home, it wasn't clear that these things had a top or bottom. But they do. SK-33 hints at it by showing the rivet patterns differing. Here's another way to tell. The first photo shows the right way:



The second photo shows the wrong way:



Look at the leading edge curve right at the top front of the rib. See how, on the second photo, it overlaps the flange? You don't want that.

Dave
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  #48  
Old 08-11-2013, 09:00 PM
David Paule David Paule is offline
 
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Default Leading Edge Rib Spacing Tool

In the photos in the previous posting, you can see a threaded rod poking out through the forward tooling hole in that rib.

In this rib, the tooling hole distance from the spar flange is a bit less than for the others. Not much of a problem but it could be awkward with some tools used for spacing the ribs. It's not obvious.

Dave
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  #49  
Old 01-25-2014, 05:49 PM
David Paule David Paule is offline
 
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Location: Boulder, CO
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Default Pitot Line Routing

When planning the routing for the pitot tube or other lines or wires, make sure that they don't interfere with access to the tank bolts that attach to the Z-fittings. I just saw an aircraft where it does, and if the tank ever needs to come off, removing those bolts will be somewhat awkward.

I think that if you can keep those wires or tubes near the top or bottom of the ribs you'll be fine.

This is just another of the many things to think ahead about.

Dave
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  #50  
Old 01-10-2015, 08:58 PM
David Paule David Paule is offline
 
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Location: Boulder, CO
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Default Tank Rib Reinforcement

Here's what the tank rib's leading edge reinforcement is supposed to look like:



But the ribs have a tooling hole that's right where the straight edge of the reinforcement goes. If you build to the drawing you'll be left trying to fill that tooling hole with sealant.

I extended the reinforcement a bit to cover the tooling hole:



Dave
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