Longeron Splice

All

What size tube are you using to splice a 3/4 X 0.035 longeron? The PA-20 plans ( I assume all the pipers are the same ) calls for tube that is 0.660 X 0.035 wall. I haven't found a source.
The next size down is 5/8 and that would leave a .055 gap between the longeron and splice tube. Seems like a lot. I could make some bushings with a .025 wall. I could use shim stock. I could turn down thick wall 3/4 tube to fit.

What are other doing?

Thanks
Marc

Thats what I do. I turn down a piece of 3/4x.065.

There is 11/16 4130. Not common, but available. Get .049 wall, turn down .015 and it will fit just right.

Burl's Aircraft as well as Atlee Dodge has some.

Take care,

Crash

3/4"x .120 turned down.

Thanks for your answers guys. Time to dust off the lathe. :smile:

Steve Pierce said:

3/4"x .120 turned down.

Click to expand...

Steve how do you finish that? There would be microscopic circumferential lines around the part just the way you would not want them for a longeron splice. Do you polish it and look at it with a microscope or?

Use an insert with a decent radius.....

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