Dimpling HS skins

November 5-6: I taped off the hole locations that remain open, and then dimpled the HS skins. Edge holes were done with the pneumatic squeezer, and the remainder with the c-frame and a hammer.

I clamped the HS cradles to the workbench and inserted the dimpled skins. The cradles were fabricated with plywood from the crate that the kit shipped in and some 2x2s from Lowes.

Then I clecoed the HS-905 nose ribs into place (two on each side), riveting will wait until tomorrow.

More Horizontal Stab and the Pneumatic Squeezer arrived.

So in the last post I mentioned that I needed to order a longeron or flange-nose yoke for my Main Squeeze squeezer from Cleaveland Tool. I got on their website Monday to order and realized that my arms and shoulders were still hurting from using the manual squeezer. So I took the plunge and bought their pneumatic squeezer kit. I emailed Mike and asked if they could substitute the flange-nose yoke for the 3″ yoke that comes standard with the kit, as I already had the yoke with my Main Squeeze. Mike emailed me back right away and said it was no problem. I completed the order with Annette, and everything arrived Wednesday. I’m 4 for 4 on great service by Mike, Annette and the rest of the crew at Cleaveland!

After getting things set up last night (Friday) I had a cinch job of finishing up the rest of the rivets in the front horizontal stabilizer spar thanks to the new squeezer. I’m looking forward to more rivets to squeeze.

I also countersunk the 400+ holes in both spars and the stringers and prepped both skins today with Prekote and maroon Scotchbrite. Prekote says to prime aluminum within 24 hours of prep, so I’ll warm up the garage first thing in the morning and prime the skins inside and out. And then use the leftover AKZO and a Q-Tip to touch up all the countersinks I made on the spars and stringers.

And my Amazon-provided torque wrench also arrived on Thursday, so I finished bolting the elevator center hinge bearing bracket onto the rear spar, then torque sealed it.

Moving the shop and assembling Horizontal Stabilizer

It’s starting to get too cold to spend a lot of time in the garage working, so we moved the two smaller EAA 1000 workbenches and assorted tools to the basement. I may leave the compressor in the garage due to noise and just run the air hose through the shared wall and into the basement.

I’ve been able to do all my structure riveting so far with my Cleaveland Main Squeeze, which has been worth every penny. BUT. I finally ran into a stopping point with the HS skeleton. The yoke that came with the squeezer is not suitable for riveting around the spar this time. So I’ll need to order a longeron yoke first thing Monday, which means I’m on hold with this portion until it arrives.

Still have plenty to work on, including deburring and priming the skins, and countersinking the two spars and stringers. Hope the weather cooperates for the priming.