(21-2 step 4):
Hmmm… stainless steel… hard stuff…
yep! At least my broken drill bit thinks so! So, there I
was happily drilling away with a 3/32" cobalt bit, clecoing as I
went. No problem… one aileron leading edge match
drilled. Instead of going to the second, I decided to go ahead
and final drill the first to their final #30 size. My plan was to
use my 1/8" cobalt bit first, and follow that up with my #30 (which
isn't a cobalt). No sooner did I pull the trigger with the 1/8",
and then crack...... lovely :-( Portions of it splintered, and
appeared to wedge in the aluminum skin... wonderful! So anyway, I
used the next size smaller cobalt bit to drill the broken one out...
probably ruined it, but it had to be done. After that, I pulled
out the splinters as best I could with a pair of needle-nose pliers,
and then final drilled the hole with my normal bit... go figure!
Actually, I think I may have been applying too much pressure to begin
with. I was careful to ease into it for the remainder and they
all went without a hitch. One down, one to go...
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