Today's Message Index:
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1. 07:08 PM - RV-7A Right Elevator Spar Machine Countersinking Technique (DANBERGERONHAM@AOL.com)
2. 07:57 PM - Re: RV-7A Right Elevator Spar Machine Countersinking Technique (Dana Overall)
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| Subject: | RV-7A Right Elevator Spar Machine Countersinking Technique |
--> RV7-List message posted by: DANBERGERONHAM@aol.com
I received my empennage kit in Feb 03 and have been moving right along. I've
completed the vertical and horizontal stabilizers and the rudder and am
currently working on the right elevator. As of this evening I'm stumped. Page
6-9
of Van's instructions say, "Machine countersink the E-709 attach holes on the
forward face of E-702. E-709 and E-702 will be riveted together with flush
head rivets, so that the WD-605-1-R elevator horn can be mounted flush with the
forward face of the E-702 spar." E-702 is the spar and E-709 the inboard
rib, both are .032" thick. I'm nervous about machine countersinking in .032 and
practiced on some scrap until I had it down to a gnat's eyelash with Avery's
countersink cutter and cage. "Beautiful," I'm thinking, "I can do this, no
sweat." I then discover that of the four holes which have to be countersunk,
two, the top and bottom holes, are so close to the spar flange that it (the
flange) gets in the way of the countersink cage and there is no way to get the
cutter lined up with the holes. I'm sure others have solved this one. How is
it
done folks?
Dan Bergeron
Chicopee, MA
(Moving along smartly on the empennage and about to order the wings.)
Message 2
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| Subject: | Re: RV-7A Right Elevator Spar Machine Countersinking Technique |
--> RV7-List message posted by: "Dana Overall" <bo124rs@hotmail.com>
Dan, I'm guessing here since it has been a while but dimple the 702. While
.032 is a little thick, it will dimple. I just dimpled a piece of scrap in
the shop. Now either countersink or dimple the rib flange and move on.
Remember, there are 6 (I think) AN4 rivets that mount the the WD-605 to the
rib..................it "ain't going nowhere". There have been a couple
places where I've had to remove the countersink from the cage, but this was
not one of them with the narrow thickness of the 702.
Just wait until you get to the fuselage................
Dana Overall
Richmond, KY
RV-7 slider/fuselage
Finish kit ordered
http://rvflying.tripod.com
do not archive
>From: DANBERGERONHAM@AOL.com
>Reply-To: rv7-list@matronics.com
>To: rv7-list-digest@matronics.com
>Subject: RV7-List: RV-7A Right Elevator Spar Machine Countersinking
>Technique
>Date: Mon, 7 Jul 2003 22:07:59 EDT
>
>--> RV7-List message posted by: DANBERGERONHAM@aol.com
>
>I received my empennage kit in Feb 03 and have been moving right along.
>I've
>completed the vertical and horizontal stabilizers and the rudder and am
>currently working on the right elevator. As of this evening I'm stumped.
>Page 6-9
>of Van's instructions say, "Machine countersink the E-709 attach holes on
>the
>forward face of E-702. E-709 and E-702 will be riveted together with flush
>head rivets, so that the WD-605-1-R elevator horn can be mounted flush with
>the
>forward face of the E-702 spar." E-702 is the spar and E-709 the inboard
>rib, both are .032" thick. I'm nervous about machine countersinking in
>.032 and
>practiced on some scrap until I had it down to a gnat's eyelash with
>Avery's
>countersink cutter and cage. "Beautiful," I'm thinking, "I can do this, no
>sweat." I then discover that of the four holes which have to be
>countersunk,
>two, the top and bottom holes, are so close to the spar flange that it (the
>flange) gets in the way of the countersink cage and there is no way to get
>the
>cutter lined up with the holes. I'm sure others have solved this one. How
>is it
>done folks?
>
>Dan Bergeron
>Chicopee, MA
>(Moving along smartly on the empennage and about to order the wings.)
>
>
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