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Archive for the ‘Wing Ribs’ Category

Preping Right Wing Skins – 2 hrs

February 10, 2011 Leave a comment

Thursday Feb 10, 2011

I’ve been struggling with a cold this week. That’s why my posts have been absent since Saturday. I got a couple of things done this week. For example, I riveted the right leading edge section to the main spar using the squeezer.

Leading edge spar rivets

I installed the right fuel tank using about half the bolts and some of the flat head screws.

Right Fuel Tank Installed

I removed the vinyl on the inside surfaces of the right wing top skins in preparation for priming these.

Devinyling wing skins

I made the scarf joint on the outboard top skin for the right wing. I still need to scarf the inboard skin.

Scarf joint

And I dimpled the skin holes in the ribs on the right wing using the squeezer.

Dimpling wing ribs

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Riveting Rear Spar to Right Wing – 1.5 hrs

September 25, 2010 Leave a comment

Saturday Sept 25, 2010

I had to go in to work again today but I had some time in the garage between about 6 AM and 7:30 AM so I riveted the rear spar to the ribs of the right wing. This time I used the squeezer with a longeron yoke and it was much easier than when I bucked them on the left wing. When I initially looked at it on the left wing I thought the longeron yoke wouldn’t reach. This is one of those cases where the instructions don’t tell you how to install the rivets and I failed to research it on the web enough to realize that I could use the squeezer.  Turns out the longeron yoke works fine in this case. Lesson: Research other builders experiences on the web at least a few steps ahead before executing. Here is a photo of the completed rivet job on the right rear spar.

Categories: Main Spars, Wing Ribs, Wings

Riveting Ribs to Front Spar, Right Wing – 1 hr

September 24, 2010 Leave a comment

Friday Sept 24, 2010

Work has been overriding airplane building this week so it has been a few days since I had time to work on the wings. But tonight after work Denise helped me rivet the main ribs to the front spar of the right wing. It really helps to have a helper when bucking rivets. We used a straight cup set with a Snap Soc (Denise drove the rivet gun) and I bucked with the tungsten bucking bar. We riveted thirteen ribs to the front spar in a little over an hour and the quality of the rivets is excellent.

Categories: Wing Ribs, Wings

Riveting Rear Spar and Priming – 5 hrs

September 19, 2010 Leave a comment

Sunday Sept 19, 2010

I completed two significant tasks today. First I riveted the rear spar to the main ribs of the left wing skeleton. This was a little awkward to do solo. I never like to buck button head rivets solo because you need to concentrate on keeping the cup set firmly against the rivet head and the bucking bar square to the rivet shank without drifting off all at the same time. If the cup set hops off you can get a nasty “smile” on the rivet head, or worse, on the rib. If the bucking bar drifts off you can get a nasty “cut” across the rivet shank. As a result I had to drill out about five rivets and replace them. It takes a lot of time to carefully drill out and replace rivets.

I started on the third rib from the inboard end because these ribs are very closely spaced and I could move the inner two ribs out of the way to make room for the rivet gun (factory head inside on the thinner material). Here is a shot after shooting the four rivets on rib 3. Notice the inner two ribs shifted over an inch or so.

Then I went to rib 2 and shot it’s rivets with rib 1 moved over. Then I shot the rivets on rib 1. Then I started at rib 4 and progressed all the way out to rib 14. This was all done on the work bench as you can see here.

Then Denise and I put the wing back onto the assembly jig because the next step will be to install the upper skins.

I also applied a coat of primer to all fourteen of the main ribs for the right wing (the ones I preped yesterday. The process is boring but here is a photo of the completed primer job with ribs laid out to cure over night. The Stewart Systems primer gets pretty durable after a day or two.

Categories: Wing Ribs, Wings

Preping Right Wing Ribs for Priming – 4 hrs

September 18, 2010 Leave a comment

Saturday Sept 18, 2010

This morning I began final preparations of the main ribs for the right wing for priming. This consisted of checking the squareness of all flanges and adjusting where necessary, checking straightness and tweaking the fluting where necessary, and scrubbing all surfaces with a scotch-brite pad to remove the shine.

I finished nine ribs before I left to go fly a solo cross country for my pilots certificate. Just as well because I needed to pick up some primer, safety wire, and scotch-brite pads at Aircraft Spruce anyway. When I got back in the afternoon I finished the remaining five ribs and I washed them all with Simple Green then rinsed well.

No pictures. Too boring to photograph.

Categories: Wing Ribs, Wings

Riveting Ribs to Front Spar – Left Wing 1.5 hrs

September 17, 2010 Leave a comment

Friday Sept 17, 2010

Tonight I riveted the main wing ribs to the front Spar for the left wing. I did this solo using Snap Socs on a straight set with my tungsten bucking bar. I started slowly but speed picked up as I progressed. All but the most outboard rib gets riveted to the spar at this stage. The outboard rib will be riveted later according to the instructions. Here is a photo.

Categories: Wing Ribs, Wings

Riveted First Rib to Left Main Spar – 1 hr

September 13, 2010 Leave a comment

Monday Sept 13, 2010

I didn’t have a lot of time in the shop tonight but even a little progress is OK sometimes. I received my order from Avery Tools today and it contained a pitot mast, pitot static installation kit, AOA line installation kit, and a bag of 10 Snap Socs. Here is what came in the box.

What’s weird is I order red 1/8 Snap Socs but Avery shipped green 5/32 Snap Socs. I wanted the 1/8 version to rivet the main ribs to the spars. I’ll call them tomorrow to find out what happened. In the mean time I wanted to proceed with riveting the main ribs to the front spar. I learned from other builders to start on the third rib from the inboard end and work toward the fuselage because the ribs are close together and face inward. You can easily bend the ribs out of the way of the rivet gun with the manufactured heads on the rib side. Then go back to rib four and work outboard.

So I shot the first set of rivets on rib 3 using a green Snap Soc. It may not fit the rivet perfectly but it seemed to help reduce the bounce of the rivet gun and I successfully drove all five rivets without a problem.

With the little extra time I had I checked the rest of the main ribs and tweaked straightness and flange perpendicularity in preparation for riveting them on in the next day or two (work schedule permitting).

Categories: Wing Ribs, Wings