20071019rs

October 19, 2007

Rear Spars

Found and drilled holes for the doubler. This hole is where the aileron push tube exits the wing and connects to the aileron.

I will mate the rear spar tip with the main section of the rear spar.

Butted the two pieces together and clamped everything straight to the table.

Drilled and cleco'd right to the table. This is a common scene in the workshop. Me, my dad, and baby Grace.

I did not rivet anything together until all pieces were drilled and ready. Moving right along, this is the inboard plates for the rear spar. Something to note: There is a Left and a Right. The Right needs to shorter... you can see the difference here after I cut some material off with the bandsaw.

Locating the correct position for the Right rear spar plate. The best way for me to do this was to place the plate inside the channel first, then drill a few holes to "lock" the position. Another thing to note: One of the plates attaches to the front of the channel, and the other to the back of the channel.

Now I placed the plate back on top of the channel to locate the most inboard holes were the attach angle goes.

Inboard Root Rib Attach Angle clamped in place. You use the holes in the angle to locate the holes in the channel and plate. A lot of stuff to drill through!

I forget what I was doing here? Maybe updrilling to # 30's.

You can see the spacers we made. The 2 outer holes are drilled to 3/16 to accept a AN3-7 bolt. The 2 center holes are riveted on.

All rear spar parts drilled and polished. As bad as I wanted to stay up rivet these on, I did not. I needed to get up early in the morning for some fly-in's!