Please post a DETAILED picture of tail post junction

[doctorcorey]

I'm not lazy, and have spent a lot of time trying to see a clear diagram or picture of the exact position of the tail post welds to longerons, specifically, the joining and position or the diagonals that join above the lower longerons. Some pix show this area, but old glue, fabric shreds and multiple layers of paint and primer obscure this detailed view I need. Thanks

 

[tempdoug]

isnt there a good piper print of that? https://www.supercubproject.com/drawings/pdfs/A3290654.pdf

 

[buckchop]

Dont forget the piece of tubing going thro the hole marked 20631, and welded on both ends to keep tube from crushing

 

[Greg Harvey]

 

[Steve Pierce]

There was a post here years ago but I cannot find it. It showed how Airframes and Univair was not intersecting the lower longeron and leaving a section of the tail post between the lower longeron and diagonal tube and they were cracking. An intersection of three tubes is stronger than two with a third just above. I will see if I have some of those pictures on my computer.

 

[tempdoug]

 

[skywagon8a]

Compare this drawing....

isn't there a good piper print of that? https://www.supercubproject.com/drawings/pdfs/A3290654.pdf

...with this picture. The diagonal in the photo does not agree with the drawing. Even though it is close, it is not accurate.

 

[Steve Pierce]

I need to find those photos of Airframes and Univair. These are two we replaced the tail on. I will get some of a Piper new fuselage I have in one of my other hangars as well.

 

[Steve Pierce]

 

[Steve Pierce]

 

[Steve Pierce]

 

[Gordon Misch]

What is the purpose of the small horizontal tube at the top of the bottom cluster?

 

[Steve Pierce]

Fixture hole for moving the fuselage around the Piper plant at Lockhaven.

 

[Steve Pierce]

 

[Steve Pierce]

Pictures from inside the Piper plant in the mid 1970s that I copied from slides that belong to Clyde Smith.

 

[tempdoug]

factory used that to move the frames through the system, see post #13

What is the purpose of the small horizontal tube at the top of the bottom cluster?

 

[doctorcorey]

Sorry I thought I replied the other day to thank you all for the great pix and knowledge. I can glean a lot of other little details from these pix, as well. Those fuselage pix that depict the tubes being spaced apart at the tail post, that definitely would place a shearing force on the post, between the two tubes. I wonder why they chose to do it that way? Once again, thanks ..

 

[tempdoug]

Sorry I thought I replied the other day to thank you all for the great pix and knowledge. I can glean a lot of other little details from these pix, as well. Those fuselage pix that depict the tubes being spaced apart at the tail post, that definitely would place a shearing force on the post, between the two tubes. I wonder why they chose to do it that way? Once again, thanks ..

just guessing beings i dont weld frames, but easier to weld around???

 

[skywagon8a]

just guessing beings i dont weld frames, but easier to weld around???

There would be less welding if the tubes were as shown on the drawing.

 

[Steve Pierce]

Harder for the welder to get in there but he must. I actually had a discussion about this with the engineer at the time at Univair.