15
Nov 07 - Deburred and Dimpled Rudder Stiffeners and Skin
- 2.0 Hours
I started off by deburring all of the holes in the stiffeners
and the skins.
This is my latest deburring setup. From left to right: cordless screwdriver (very
light), hex by threaded adapter for deburring countersinks, Avery
3 flute burring cutter, Planetools
standard #40 100 degree countersink. I bought the 3 flute deburring
tool from Avery because I thought it would be easier to get lined up in the holes.
The standard #40 countersink takes a few seconds longer to get the pilot into the
hole. I ran into a problem with the Avery deburring countersink however. It seems
to leave a jagged ring when deburring as opposed to the standard countersink which
leaves a very smooth ring. I will contact Avery and ask them about the problem.
In any case, I used the standard countersink for the rest of the evening.
As you move closer to the trailing edge of the rudder skin, it is harder to get
any sort of tool in there. So I just used the countersink and rolled it by hand.
A couple of turns is all it takes to get rid of any remaining burrs (few if any
burrs were present due to the use of the reamer as opposed to a standard drill bit.
See last post for more info.
Finally, I dimpled the stiffeners and skin using the DRDT-2. I thought it might
be easier to use the squeezer, but I was really able to get in a rhythm with the
DRDT-2 on these stiffeners and I think it went faster.
All that is remaining to do before priming is to edge finish the skin. I will complete
that tomorrow and hopefully prime tomorrow as well.
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