LAMPSguy
Well Known Member
Please reference page 11-03 Rev 1 or see the photo if you can read it
Two questions:
I am instructed to countersink the screw holes IAW Figure 3 and 4. Those figures show the skins being dimpled. I read ahead to see that the tanks use #8 and the access plates use #6 screws. What is the best method to determine countersink depth? Take a .032 piece of Al and drill, deburr, and dimple for the #40/#30/#8/#6 hardware and use THAT as my countersink go-nogo gauge or just use a precision instrument to measure per the specs in the figures 3/4 as stated above?
Also, it says to "machine countersink in all rib locations" I have highlighted this in green. Do I just countersink the flanges, or does it really mean ALL locations and I should CS the whole spar web as well (also highlighted in green).
I am probably over thinking all this, but I have already screwed up by not looking too closely tat the instruction so I am a little gun shy now.
Two questions:
I am instructed to countersink the screw holes IAW Figure 3 and 4. Those figures show the skins being dimpled. I read ahead to see that the tanks use #8 and the access plates use #6 screws. What is the best method to determine countersink depth? Take a .032 piece of Al and drill, deburr, and dimple for the #40/#30/#8/#6 hardware and use THAT as my countersink go-nogo gauge or just use a precision instrument to measure per the specs in the figures 3/4 as stated above?
Also, it says to "machine countersink in all rib locations" I have highlighted this in green. Do I just countersink the flanges, or does it really mean ALL locations and I should CS the whole spar web as well (also highlighted in green).
I am probably over thinking all this, but I have already screwed up by not looking too closely tat the instruction so I am a little gun shy now.