Seeking Aileron Pulley Bracket Advice

Discussion area for builders of Pietenpol aircraft, both beginners and experienced folks. Share ideas, ask questions and help build the Pietenpol community.
Post Reply
r1200gsDave
Posts: 35
Joined: Thu Nov 30, 2017 12:14 pm
Location: Monroe, WI USA
Contact:

Seeking Aileron Pulley Bracket Advice

Post by r1200gsDave » Thu Mar 01, 2018 9:15 pm

I am working on the aileron pulley bracket this weekend for my Pietenpol. I am seeking any advice you might have.
Attachments
pulley assembly.png

User avatar
taildrags
Posts: 274
Joined: Tue Mar 07, 2017 10:39 pm

Re: Seeking Aileron Pulley Bracket Advice

Post by taildrags » Thu Mar 01, 2018 10:29 pm

r1200GSDave-

I have never built this bracket myself, so there isn't much that I can offer. However, seeing that the plans call for brazing the inner brackets to the main "U" pulley holder bracket, I have read about problems with brazing 4130 steel and cracks developing. If you are making your parts out of 4130 and you can weld this rather than brazing it, that would be better but if not and since this is not primary structure, it probably doesn't make any difference.

B Wilson
Posts: 11
Joined: Wed Feb 22, 2017 10:38 pm

Re: Seeking Aileron Pulley Bracket Advice

Post by B Wilson » Fri Mar 02, 2018 10:07 pm

Don't mean to hijack your thread, but I am also building these and I have a question. I am using 4130 and plan to gas weld them, but it looks like you need to put the attachment bolts through the bracket before you weld them up. Any thoughts from anybody?
Thanks,
Brent

B Wilson
Posts: 11
Joined: Wed Feb 22, 2017 10:38 pm

Re: Seeking Aileron Pulley Bracket Advice

Post by B Wilson » Fri Mar 02, 2018 10:11 pm

Don't mean to hijack your thread, but I am also building these and I have a question. I am using 4130 and plan to gas weld them, but it looks like you need to put the attachment bolts through the bracket before you weld them up. Any thoughts from anybody?
Thanks,
Brent

User avatar
taildrags
Posts: 274
Joined: Tue Mar 07, 2017 10:39 pm

Re: Seeking Aileron Pulley Bracket Advice

Post by taildrags » Sat Mar 03, 2018 3:38 pm

Brent; if the part is held up to the wood, you're right... it will not be possible to insert the bolts with the part assembled. However, if the bolts are inserted into the holes in the metal and they're not a tight fit, the part could then be moved into position and the bolts pushed through the holes in the wood. Good luck getting a socket or wrench on the bolt heads though. the only way to hold the bolts from turning will be to jam a screwdriver or chisel in there and then tighten the nut.

This is one of those parts that you might think about welding the bolts into the U-bracket before welding on the inner pulley brackets and then it's all good.

B Wilson
Posts: 11
Joined: Wed Feb 22, 2017 10:38 pm

Re: Seeking Aileron Pulley Bracket Advice

Post by B Wilson » Sat Mar 03, 2018 11:07 pm

Thanks Oscar
I think inserting them and welding them to the u bracket is a good idea.
Keep up the good work. I really appreciate your commitment to replying to everybody's questions. It keeps things interesting on our site.
BW

r1200gsDave
Posts: 35
Joined: Thu Nov 30, 2017 12:14 pm
Location: Monroe, WI USA
Contact:

Re: Seeking Aileron Pulley Bracket Advice

Post by r1200gsDave » Thu Mar 15, 2018 8:41 pm

This is one of those deceivingly "simple" parts that take an enormous amount of time. I have a pretty good prototype and 5 scrap parts.....

Welding the thin 4130 is above my skill. But I have found a workable design that I can make.

The bolt does not need to welded in place. You will have to temporarily bend the inner tab in to fit a nut driver on it.

r1200gsDave
Posts: 35
Joined: Thu Nov 30, 2017 12:14 pm
Location: Monroe, WI USA
Contact:

Re: Seeking Aileron Pulley Bracket Advice

Post by r1200gsDave » Thu Mar 15, 2018 8:50 pm

This is a horrible mess.... none of these are airplane parts. Just me trying to figure out how to make the part and work on my welding skills....

The best I got to is a backwards L that I flat weld in place.
Attachments
20180315_204316.jpg

r1200gsDave
Posts: 35
Joined: Thu Nov 30, 2017 12:14 pm
Location: Monroe, WI USA
Contact:

Re: Seeking Aileron Pulley Bracket Advice

Post by r1200gsDave » Fri Mar 16, 2018 6:22 pm

I have two winners! the "L" version worked well and I am ready to powder coat the parts tomorrow.
Attachments
20180316_161655.jpg

r1200gsDave
Posts: 35
Joined: Thu Nov 30, 2017 12:14 pm
Location: Monroe, WI USA
Contact:

Re: Seeking Aileron Pulley Bracket Advice

Post by r1200gsDave » Fri Mar 16, 2018 9:09 pm

Here are some more photographs of how I make the bracket.

As usual It took me a days to figure out how I would finally make the part. now that i have made it I can make it in about 30 minutes.
However I still cannot make two identical parts. They are really similar, but hand made parts still have slight variances.

Peace
Attachments
20180316_210049.jpg
20180316_205957.jpg

at7000ft
Posts: 24
Joined: Mon Mar 06, 2017 3:06 pm

Re: Seeking Aileron Pulley Bracket Advice

Post by at7000ft » Tue Jun 18, 2019 9:35 pm

P1010459.JPG
I tig welded mine, and in order to get the bolt in after welding I ground the hole out a little so the bolt could be inserted at a slight angle.

Rick H

Image
https://drive.google.com/open?id=0B1Y1j ... DFSeno5VTg

User avatar
Lownslow
Posts: 25
Joined: Wed Mar 08, 2017 9:56 am

Re: Seeking Aileron Pulley Bracket Advice

Post by Lownslow » Thu Jun 20, 2019 7:46 pm

Thats what I did too.

Post Reply