Eagler's Nest

Airframes => Single Seaters => XL => Topic started by: Flyguyeddy on April 07, 2020, 04:49:16 PM

Title: Tail ribs
Post by: Flyguyeddy on April 07, 2020, 04:49:16 PM

Im struggling with the tail section, and was hoping those of you who have built the aluminum ribs could help. 

Did anyone cope the rib to sit against the tube?   How did you deal with where two ribs (or 3) converge under one gusset?  Just leave them full width and spaced apart or bevel them to nest against the one next to it? 

I assume a coped rib would be the strongest but i imagine i could be overthinking it, as i am want to do.

Title: Re: Tail ribs
Post by: Steve on April 07, 2020, 05:24:20 PM

Quote from: Flyguyeddy on April 07, 2020, 04:49:16 PM

Im struggling with the tail section, and was hoping those of you who have built the aluminum ribs could help. 

Did anyone cope the rib to sit against the tube?  How did you deal with where two ribs (or 3) converge under one gusset?  Just leave them full width and spaced apart or bevel them to nest against the one next to it? 

I assume a coped rib would be the strongest but i imagine i could be overthinking it, as i am want to do.

(http://www.angoraaffaire.com/leu/empennage.htm)
 (http:// http://www.angoraaffaire.com/leu/empennage.htm)
 (http://www.angoraaffaire.com/leu/empennage.htm) (http:// http://www.angoraaffaire.com/leu/empennage.htm) (http://www.angoraaffaire.com/leu/empennage.htm)http://www.angoraaffaire.com/leu/empennage.htm

Mike in Wisc has a Vid on the empennage mixed in with his fus build vids on youtube
https://www.youtube.com/channel/UCHLgOWzjJXe-mMVGMkSY4uw (https://www.youtube.com/channel/UCHLgOWzjJXe-mMVGMkSY4uw)

The ribs made from sheet material were formed with a box brake... 3/8" flanges turned down, coped between tubes...

 (http://www.angoraaffaire.com/leu/empennage.htm)

Title: Re: Tail ribs
Post by: Flyguyeddy on April 07, 2020, 05:31:15 PM

Im not terribly sure if that graphic applies to the ribs

Title: Re: Tail ribs
Post by: Kamcoman77 on April 07, 2020, 11:10:29 PM

Perhaps this will help.

Title: Re: Tail ribs
Post by: Vince Carucci on April 09, 2020, 04:24:57 AM

Coped everything for best fit.

Title: Re: Tail ribs
Post by: ParQld on April 10, 2020, 02:54:15 AM

Looks Good Vince, what rivets did you use ?

Title: Re: Tail ribs
Post by: jrbirdman47 on April 10, 2020, 03:24:18 AM

Thanks, Vince! Constantly raising the bar for us! :))

Title: Re: Tail ribs
Post by: Flyguyeddy on April 10, 2020, 04:11:12 AM

I purchased rivets from fastenal, the ones outlined in a video by mike on youtube ‘leagleeaglebuild’

Title: Re: Tail ribs
Post by: Vince Carucci on April 10, 2020, 04:21:28 AM

97447A010 (https://www.mcmaster.com/97447A010)

MCMaster-Carr: a box of 250 cost $8.40 US.

Title: Re: Tail ribs
Post by: Flyguyeddy on April 10, 2020, 04:43:35 AM

Quote from: Vince Carucci on April 10, 2020, 04:21:28 AM

97447A010 (https://www.mcmaster.com/97447A010)

MCMaster-Carr: a box of 250 cost $8.40 US.

Arent they supposed to be stainless?

Title: Re: Tail ribs
Post by: Vince Carucci on April 10, 2020, 05:03:24 AM

Can't imagine why. Aluminum is lighter.

Title: Re: Tail ribs
Post by: Tom XL-7 on April 10, 2020, 06:32:51 AM

Drawing calls out stainless steel coated with zinc paint to prevent galvanic action. Steel for strength. Not sure which concerns me more. Strength or galvanic action. I believe Leonard puts wet paint in the hole and possibly on the bottom of the rivet and then pulls it. If it is dry it won't react

Title: Re: Tail ribs
Post by: Flyguyeddy on April 10, 2020, 07:15:09 AM

Sonex uses stainless pull rivets exclusively in their aluminum airplanes.  I see no need for all the extra painting.