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Tail Cone Page 10-20 Question

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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Thu May 07, 2009 4:44 pm Post subject: Tail Cone Page 10-20 Question

"Step 3: Rivet both F-1073 Side Skins to the Stiffeners, frames and

bulkheads. Start riveting at the top of the skins (don't  river the

F-1032 Longerons). *then work down and around the bottom radius of the

skins*."

Looking for technique recommendations for riveting the bottom radius

of each frame/bulkhead. I've back riveted all the flat part of the

side skins. Looks like either conventional flush rivet set or back

rivet might work but will be tricky to stay dead on the rivet and not

ding the skin.



Kelly

40866

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

Deems Davis

Joined: 09 Jan 2006
Posts: 925

Posted: Thu May 07, 2009 4:58 pm Post subject: Tail Cone Page 10-20 Question

Kelly, I used some padding, on each side and under to position the 

tailcone so that those rivet lines would be flat to the table and the 

large rivet plate positioned underneath them, then used the back rivet 

set to pound them, worked pretty good for me.



Deems Davis

N519PJ



Kelly McMullen wrote:

 	  Quote: 	
		   



 "Step 3: Rivet both F-1073 Side Skins to the Stiffeners, frames and

 bulkheads. Start riveting at the top of the skins (don't  river the

 F-1032 Longerons). *then work down and around the bottom radius of the

 skins*."

 Looking for technique recommendations for riveting the bottom radius

 of each frame/bulkhead. I've back riveted all the flat part of the

 side skins. Looks like either conventional flush rivet set or back

 rivet might work but will be tricky to stay dead on the rivet and not

 ding the skin.



 Kelly

 40866

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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:

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rv(at)thelefflers.com
Guest

Posted: Thu May 07, 2009 5:14 pm Post subject: Tail Cone Page 10-20 Question

I just used a standard flush rivet set.



Bob

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Jim Berry

Joined: 10 Jan 2006
Posts: 237
Location: Denver

Posted: Thu May 07, 2009 6:48 pm Post subject: Re: Tail Cone Page 10-20 Question

Kelly,



I did the same as Deem's. With a couple of old pillows I was able to prop the tail cone so the the section being riveted was always flat on the back rivet plate. When you get to the upper aft tail cone skin, I would suggest you back rivet the stiffeners to the skin before you cleco the skin to the bulkheads. Just leave the rivets out temporarily where the stiffener crosses the bulkheads. It is much easier to do the top skin with everything flat on your bench, than it is to do it working inside the cone. With a little flexing of the stiffeners, it was no problem getting them and the skin positioned on the bulkheads. I had zero smiley's on my tail cone. I love back riveting.

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Phil.Perry(at)netapp.com
Guest

Posted: Fri May 08, 2009 7:36 am Post subject: Tail Cone Page 10-20 Question

I back riveted them against a bucking bar - not a back rivet plate.



I gave my highly unskilled wife the bucking bar and asked her to hold it

tight against the skin and flush head.  On the other side, I shot it

with a back rivet set.



Worked great and we didn't have to worry about rolling the entire

assembly around.



One word of caution on the back rivet technique for the bulkheads

though.  Pay attention to where your retainer spring is located...  The

retainer spring on the rivet gun is the right height and it will want to

hang on the bulk head.  Qhen you pull the trigger, it'll cut into and

notch your bulkheads before you know it.



Phil





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Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Fri May 08, 2009 6:27 pm Post subject: Tail Cone Page 10-20 Question

Thanks for all the suggestions. Back riveted a couple, found it to be

difficult to get tail cone tight enough against back rivet plate, so

did the rest with flush set, and my able SO bucking. Came out fine.

Hangar at 103F this afternoon slowed progress a bit.



On Fri, May 8, 2009 at 8:32 AM, Perry, Phil <Phil.Perry(at)netapp.com> wrote:

 	  Quote: 	
		   



 I back riveted them against a bucking bar - not a back rivet plate.



 I gave my highly unskilled wife the bucking bar and asked her to hold it

 tight against the skin and flush head.  On the other side, I shot it

 with a back rivet set.



 Worked great and we didn't have to worry about rolling the entire

 assembly around.



 One word of caution on the back rivet technique for the bulkheads

 though.  Pay attention to where your retainer spring is located...  The

 retainer spring on the rivet gun is the right height and it will want to

 hang on the bulk head.  Qhen you pull the trigger, it'll cut into and

 notch your bulkheads before you know it.



 Phil

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

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