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Elevator - Elev Trim Tab Skin (E-619) and Elev Counterbalan

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gareywittich2000(at)yahoo
Guest

Posted: Mon Mar 09, 2009 6:35 pm Post subject: Elevator - Elev Trim Tab Skin (E-619) and Elev Counterbalan

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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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Mon Mar 09, 2009 8:22 pm Post subject: Elevator - Elev Trim Tab Skin (E-619) and Elev Counterbalan

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: 	
		   

 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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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV-List

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

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