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Dana Overall's RV-7 Construction Site. This site is also under construction.
Horizontal Stab 1
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I got lucky and received my emp kit in the first batch to come out Van's totally pre punched.  I didn't plan it that way, it just happened.  The construction of the HS in the following pages will not follow the instruction procedures of prior kits.  The assembly did however, go without a hitch and produced a structure that is both strong and straight.

hs1.jpg

In preparation to final drill the remaining pre punched holes in the two 609s, 603s.  You will notice the 710 and 714 on the emps. sent out now have the flanges cut off but you still need to remove the area outside of the bend lines.  All the center holes are pre punched.

hs2.jpg

hs3.jpg

You will notice I have labeled the 603s and 609s so that you can place them back into their original positions after you deburr.  I used 1 right, 2 left, T top and B bottom.  Worked for me.

hs4.jpg

My way of making sure each bracket stays with it's partner.  I marked the bottom flange of each bracket to match a mark on the 603 or 609.

hs5.jpg

The 6 degree bends in the 710 and 714.  At this point you final drill the holes outside the bend lines.  The holes are pre punched in the 710 and 714.

hs6.jpg

Now here is where the plans for the emps. sent out after the end of January 2002 differ from prior plans (even prior 7 plans).  At no point in the plans is "jig" or "plum" EVER mentioned.  The only ribs not pre punched are the inboard center (405) and inboard tip (406).  With the other ribs pre punched the assembly can not be anything other than plum.  It does turn out straight.  You drill the inboard 702 and the 404 and 405.

hs7.jpg

All holes are now final drilled.

hs705.jpg

The 601 skin now comes off and everything gets deburred and dimpled.  You can see how jagged the holes in the 404 are in this picture.

hs8.jpg

Everything deburred, dimpled and primed. 

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