I finished all the countersinking tonight on all the stiffeners and gussets. The hard wood jig I use to hold the part while using the microstop in the cordless drill is working great. I started to dimple the firewall, but after a few holes trying to holding the part and dimple by myself I thought better of it. I’ll get Annabelle to help out later this week.
Tasks Completed:
–Finished dimpling the elevator stiffeners
–Dimpled E615 and the nut plates
–Scotchbrite stiffeners
–Started dimpling stiffeners
Note: Dimpled one of the E720H stiffeners on the wrong side. Ordered replacement from Van’s.
–Trimmed the E 720 J, K and L stiffeners
–Clecoed left stiffeners
–Trimmed the vinyl on right elevator skin
–Clecoed stiffeners on right elevator skin
Note: The tapered end on some stiffeners needs to be trimmed further.
–Made stiffeners for left and right elevators
I trimmed all the stiffeners tonight. I ran out of time so I was just able to mark the E 720 J,K,L stiffeners for extra trimmings
–Continued to work on rudder leading edge
–Started trimming elevator stiffeners
I got the leading edges of the rudder clecoed– barely. They look ok. The creases aren’t very difficuly to see luckily. Also I relized I didn’t bend the edge of the skin where the 2 sides overlap. I don’t even have an edge bend tool yet. I sat the rudder aside to come back to and started working on the elevator stiffeners.
–Primed stiffeners
–Riveted stiffeners to left skin
I used Tempo Zinc Chromate on the stiffeners because I couldn’t find any self-etch locally. I does not seem to adhere well at all compared with the 7220. It’s good enough for these stiffeners but I won’t be using it again.
The first few rivets for the left skin stiffeners were poorly driven because I couldn’t get the back rivet set to fit well against the stiffener flanges. I ground down the plastic on the back rivet set to get clearance against the stiffeners. After this the riveting work much better.
–Match drilled rudder stiffeners and both skins
–Started dimpling rudder parts