I could use a little help here.... and I don’t know that can explain my confused state well, so bear with me.
Referring to DWG3 SEC D-D I am told to "mark the hole locations on the forward side of the forward flange of HS-405..."
The top hole looks simple enough; I just measured from the top of the bent flange ¼ inch and that one is done. The other three holes however use reference locations on the other side of HS702 (front spar) with the angles (810 and 814) attached. I can’t see a way to transfer the vertical component of this location short of drilling through the HS 702 and that wouldn’t work because I have no horizontal reference to position that hole. In any event, that is not what the instructions tell me to do. It looks like everything gets matched drilled together later…I am only supposed to mark the positions of the holes at this point, then drill pilot holes.
I think I am looking at this too hard cause I just cant see how I am supposed to get the position transferred accurately from the front of one part to the front of another.
For those of you who have been here before, can you share with me the solution…perhaps with pix if possible?
Thanks in advance.
