StressedOut
Well Known Member
I'm trying to machine countersink the rudder trailing edge wedge, but I'm running into a problem. I'm hoping you guys who've been down this road already can offer some advice.
Per section 5.5 (machine countersinking), it says to go 0.007 in. deeper than flush if you're putting a dimpled skin on top of the countersink. On a scrap sheet of 0.063 in. aluminum I set the countersink cage per instructions. Then I took a scrap piece of wedge and countersink both sides.
When I examine the two sided countersink, it appears there is a knife edge condition and the hole is enlarged slightly. To confuse matters further, on page 5-12 there is a cross section of the wedge/skin assembly and it alludes to a significant and decidedly non-knife edged hole with both countersinks.
Furthermore, in section 5.8 (riveted trailing edges), there is no indication that you should cut differently than specified in section 5.5. Section 5.8 deals with setting up the proper angle on the wedge to use your drill press for countersinking. I'm using the Cleaveland Tools drilling guide for the RV-14 wedge so that allows me to get a nice perpendicular angle for this countersinking.
Can anybody clue me in to what I should do?
Per section 5.5 (machine countersinking), it says to go 0.007 in. deeper than flush if you're putting a dimpled skin on top of the countersink. On a scrap sheet of 0.063 in. aluminum I set the countersink cage per instructions. Then I took a scrap piece of wedge and countersink both sides.
When I examine the two sided countersink, it appears there is a knife edge condition and the hole is enlarged slightly. To confuse matters further, on page 5-12 there is a cross section of the wedge/skin assembly and it alludes to a significant and decidedly non-knife edged hole with both countersinks.
Furthermore, in section 5.8 (riveted trailing edges), there is no indication that you should cut differently than specified in section 5.5. Section 5.8 deals with setting up the proper angle on the wedge to use your drill press for countersinking. I'm using the Cleaveland Tools drilling guide for the RV-14 wedge so that allows me to get a nice perpendicular angle for this countersinking.
Can anybody clue me in to what I should do?
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