Strikefinder
Member
Hi all,
I've just finished up inventorying my wing kit and I'm setting up a jig to start installing platenuts on the wing spars for the tank skin attachments and access plates.
I admit I'm a bit apprehensive about this step--it seems like there's a fair amount of opportunity to screw it up, so I was hoping I could run my thinking past the group to make certain I'd assimilated everything I need to know:
1. I've read through "Drilling Recesses for Tank Screw Dimples" from the RV-ator 2005 1st, and know to "countersink until the top of the screw is level with the surface, then go two clicks deeper on the microstop. The actual outside diameter of the countersink measures .365-.375?. I know this might be somewhat smaller than a hole you'd get if you took a sample piece of aluminum skin and dimpled it for the hole.
2. I was leaning toward using the technique described here: http://www.vansairforce.com/community/showthread.php?t=2740; basically, using aluminum angle as a mechanism to center the pilot for the #19/#28 pilot countersinks. Should I have this bar in place to do the #40 holes as well? Any reason why I shouldn't use this technique and use the platenuts with a #30 pilot as per the directions?
3. Once I have the holes, how does everybody spot prime them? Alodine pen seems to be the cleanest method...another $100 in the hole unless I can come up with a better idea. Should I use the Alodine pen on the #40 countersinks, even though there will be a rivet? Better safe than sorry?
Is there anything big I'm missing/should consider before I start going down this road? I appreciate any further pointers before I boldly go where everybody else has gone before...
I've just finished up inventorying my wing kit and I'm setting up a jig to start installing platenuts on the wing spars for the tank skin attachments and access plates.
I admit I'm a bit apprehensive about this step--it seems like there's a fair amount of opportunity to screw it up, so I was hoping I could run my thinking past the group to make certain I'd assimilated everything I need to know:
1. I've read through "Drilling Recesses for Tank Screw Dimples" from the RV-ator 2005 1st, and know to "countersink until the top of the screw is level with the surface, then go two clicks deeper on the microstop. The actual outside diameter of the countersink measures .365-.375?. I know this might be somewhat smaller than a hole you'd get if you took a sample piece of aluminum skin and dimpled it for the hole.
2. I was leaning toward using the technique described here: http://www.vansairforce.com/community/showthread.php?t=2740; basically, using aluminum angle as a mechanism to center the pilot for the #19/#28 pilot countersinks. Should I have this bar in place to do the #40 holes as well? Any reason why I shouldn't use this technique and use the platenuts with a #30 pilot as per the directions?
3. Once I have the holes, how does everybody spot prime them? Alodine pen seems to be the cleanest method...another $100 in the hole unless I can come up with a better idea. Should I use the Alodine pen on the #40 countersinks, even though there will be a rivet? Better safe than sorry?
Is there anything big I'm missing/should consider before I start going down this road? I appreciate any further pointers before I boldly go where everybody else has gone before...