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Old Feb 19, 2013, 05:37 PM
Hot Dawg Glider Pilot
schrederman's Avatar
United States, TX, Weatherford
Joined Nov 2002
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Tubing - Metric

I do a lot of wood building and would like to use 3 or 4 mm cf rods in the tails of a project. However I can't seem to find any aluminum tubing with the corresponding inside diameter... Suggestions???
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Old Feb 19, 2013, 07:45 PM
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wyowindworks's Avatar
Cody, WY
Joined Nov 2007
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You can make some composite ones. Do a search in this forum for joiner tubes.

If they are short you can make them this way.
Composite Sleeve Made on a Mandrel (0 min 30 sec)
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Old Feb 19, 2013, 07:56 PM
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Joined Jan 2008
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How much do you need?

Pretty sure I have 3 & 4 mm ID alum and brass tube kicking around, if not there is a metric stocked hobby shop a few blocks away so I could grab some and send them to you.

Tony
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Old Feb 19, 2013, 11:37 PM
Hot Dawg Glider Pilot
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United States, TX, Weatherford
Joined Nov 2002
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I had considered making my own but it seems that for a 3 or 4 mm rod it would be looser than I want. They need to be reasonably slop free.

TD, I just need a foor or so of preferably 4 mm i.d. tube. Before I go to the trouble of getting you to send it, let me see what I can sourse up... Thanks, all...

JW
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Old Feb 21, 2013, 09:39 PM
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Quote:
Originally Posted by schrederman View Post
I had considered making my own but it seems that for a 3 or 4 mm rod it would be looser than I want. They need to be reasonably slop free.

...............................
JW
I recently made some 2.5 mm diameter tubes using some of Soller Composites very nice biaxial sleeving. I spiral wound the mandrel with drop sheet plastic cut into strips approx 25 mm wide. The plastic pulls out after removing it from the mandrel. 4 mm diameter would be easy.
I'm a real fan of glass and carbon biaxial sleeving (sock) now!
The same could be done with spiral wound strips of glass, as well as the wrap method Adam describes above.

The plastic release sheet provides a good working clearance with out slop, but still easy to fit and remove the rod.
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Old Feb 22, 2013, 12:00 AM
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Cody, WY
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The ones that I made in the video have a perfect fit. I wax the rod and then dip it in PVA and hang it to dry. You want to use a wax like Part-all Paste #2 so the PVA doesn't bead up. No plastic is used between the mandrel and the layup.
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Old Feb 22, 2013, 01:55 AM
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Originally Posted by wyowindworks View Post
The ones that I made in the video have a perfect fit. I wax the rod and then dip it in PVA and hang it to dry. You want to use a wax like Part-all Paste #2 so the PVA doesn't bead up. No plastic is used between the mandrel and the layup.
I'm impressed Adam!

I have never tried it with the wax and PVA and no plastic. I'll give it a go next time.
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Old Feb 22, 2013, 06:29 AM
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I tried with a 3mm alu mandrel. Stuck like a b*sturd. Eventually got it off, but needed pliers so I damaged the tube.

Do you polish the mandral to a certain standard? I assumed the PVA would make up for minor problems?
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Old Feb 22, 2013, 10:29 AM
Just fly it!
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Cody, WY
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Originally Posted by Jim.Thompson View Post
I'm impressed Adam!

I have never tried it with the wax and PVA and no plastic. I'll give it a go next time.
I should say that I've never tried it without plastic for tubes longer than 4 inches.
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Old Feb 22, 2013, 08:49 PM
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United States, TX, Weatherford
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Thanks, Adam... I have both the Part-All Wax and some PVA... I'll be giving that a try!

Jack
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