4/06/2009 Tank - 1 hour Yesterday I got in a little time. I match drilled the holes in the tank attach angle and the inboard rib. I also match drilled the fuel cap flange. I machine countersunk the holes in the fuel cap flange and the holes in the access plate stiffening ring.
4/22/2009 Tank - 3 hours Last night I got all the last minute things done to prepare for tank assembly. I started by dimpling the tank skin.
After dimpling the skin, I used a scotch brite pad to rough up the inside of the skin where the ribs and stiffeners will go, then wiped down the inside of the skin with MEK. After that, I drilled all my holes in the ribs for fuel return and vent lines. I also match drilled the T-410 nose rib stiffeners for the two end ribs in the tank. I fabricated the anti-hangup bracket for the inboard most end rib, and also the trap door for the second most inboard rib. I should have everything lined up to start attaching parts next time. Next session should include proseal and rivets!
