Greg Green
Joined: 20 May 2008
Posts: 7
Location: Seattle, Washington, USA
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 Posted: Mon Mar 09, 2009 10:10 pm Post subject: Elevator - Elev Trim Tab Skin (E-619) and Elev Counterbala |
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Question 2: the bevel provides a ramp that the elevator skin will sit on so there isn't a step. When the rivets are in the elevator skin will get sucked down on to the ramp. The ramp only needs to be above the spar and the rib. You are right that the ramp could be in the elevator skin instead, but the counterbalance skin is where I put the ramp as the instructions say.
I looked through my pictures hoping I had one of the bevel, but no luck. You can't really see it after it is put together. It is the same situation on the rudder with it's counterbalance skin.
I just did the rivets on the trim tab horn a few weeks ago. Don't remember having any trouble. I used the hand squeezer.
On Mon, Mar 9, 2009 at 9:21 PM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:
| Quote: | --> RV-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
To your first question. Some of the holes need to be dimpled with a pop-rivet dimple die set. If you bent the tabs so they are flush with the edge of the unbent skin, there is adequate space for the dimple die. Just did mine a few weeks ago. You are lucky you only have one to do...the 10 has two trim tabs, that are interchangeable with the single tab on the 9.
Kelly
RV-10
Tail cone
Garey Wittich wrote:
| Quote: | --> RV-List message posted by: Garey Wittich <gareywittich2000(at)yahoo.com (gareywittich2000(at)yahoo.com)>
Greetings:
Ref: RV-8A (RV-7 is the same = Drawing 4)
Looked on Matronics, but found no answers to these questions
Question 1:
When building the Elev Trim Tab Skin it says: 1) bend the Skin with the wooden brake, 2) bend the 2 metal "tabs" that are at each end, 3) match drill the Trim Tab Horns (E-717 and E-718) to the Skin. So far no problem, BUT now how do you then dimple the Skin where the E-718 (INBOARD Trim Tab Horn) goes as the 2 rivets for it are approx 1/8" from the bent Skin Tab ????? One of the 2 rivets is also near the bent trailing edge which makes it impossible to get at.
Question 2:
Instructions say to "bevel the inboard and aft edges of the Counterbalance Skin (E-713) locally where the Counterbalance Skin overlaps the (Elev) Spar and Rib flanges to provide a smooth transition between the Counterbalance Skin and the Elevator Skin." This does not make sense. I can see "beveling" the Elev Skin "at the point" where the Counterbalance Skin goes UNDER the Elev Skin to make a smooth transition. Am I missing something ???
Appreciate your help,
Garey Wittich RV-8A Santa Monica, CA
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