4 hrs. today finishing up the wing rib sub-assemblies and starting the prep on the remaining wing parts.

Notice the rivets that must be riveted from the inside (as per the instructions).

Hmm, two holes on Wing Rib 8 that don't have matching holes in the part behind.  Drill through and rivet?

Torquing the hinge nuts.  AN4 bolts need 85 in-lbs, but you need to add the friction drag of the nuts.  I estimated (not sure how to measure it...) that to be 15 in-lbs, so the total set on the torque wrench was 100 in-lbs.

Nuts marked!

Wing Rib 8's finished!

Uh oh, seems I have two left parts (WG-CHL-007-L-C-0), not a left and right.

Got my new rivet gun today!  Now I can continue work while I unjam the other one.

Also, I updated my Education Page with book recommendations for building and flying.  If anybody has any recommendations I missed, please let me know!

Found this useful video on installing bolts.

2 hr's today priming parts (it was a beautiful day!) using my new priming rig and new sprayer (which I LOVE!).  My previous pneumatic sprayer, which I found difficult to use, died, so I bought a highly recommended electric sprayer.  This sprayer is light-years easier to use and it has a perfect fine spray.  Also, since it's electric, it is way easier to move around.  I'll post a video sometime over the next week or so showing my whole part prep process from pulling the plastic off to priming.

Notice the orientation of the bolt: down.  So, if the nut falls off, gravity keeps it there.  This is standard practice (but not noted in the instructions so you should know this).

Cleco'ed up and ready to rivet!

Had to bend one flange of this part out and this is how I did it.

Then the rivet gun jammed and progress ended for the day...  Will try to unjam it tomorrow...  Argh...

Just a quick note that I updated the side and top view images and pdf's on misc. page.  I got rid of the rivet lines so it looks cleaner.

Spent some time over the last couple of days playing with paint schemes.  Ignore the specific colors as I used the decidedly low-tech approach of using Crayola markers. ;-)

I like this one better.

Matching top-view.  Superman? ;-)

Swapped the colors and slightly modified the lines.  Ignore the bleed-through from another drawing.

I updated my Miscellaneous Thoughts page with cleaned up side and top views of the Sling 4 which you can download.  I've started to play around with paint schemes. :-)

1.5 hrs. Putting together my new priming setup and removing plastic from wing nose ribs.

Using a garment rack (bought from Amazon) I attached a large towel to the hanging bar with clips top and bottom.  Here's a picture of one side - the other side also has parts hanging, so I can actually prime many parts in one shot.  I use 14 gauge solid wire to hang the parts.

Unwrapped the main wing spars to get ready for deburring, cleaning and priming.  I recently read a quote from an expert builder and accident investigator that said that every time they investigated an accident due to a metal structural member failing it was always due to that part not being properly deburred (crack propagating).  I ran my finger along the edges of the spar and they need to be deburred.  I will be very careful to ensure silky smooth edges.

Wing Nose Ribs 106, 107 and 109.  One of the 106 ribs was labeled 109 and the 106 and 109 seem to be perfectly identical - so the question is, do I have the correct 106 ribs?  Perhaps the 106 and 109 ribs are the same and one was just mislabeled?  Stay tuned.