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Hi Bob,
Assuming you want the adjustable length intake feature. You want drawn not extruded (most common) aluminum tubing. Drawn is more dimensionally accurate. Now if you are not using the adjustable feature then extruded 6061 is fine.
Here is my source for tubing designed to slide inside one another. 6063-T832 Drawn Aluminum Tubing (Round), they also have the 6061 -T6 tubing as well.
http://www.texastowers.com/aluminum.htm
They take small orders with no hassle.
Here is another potential source, however they looked like the would want substantial order sizes. But, I never tried them and so could be wrong about that.
http://www.argylein.com/telescoping_tubing.html
Ed
Ed Anderson
Rv-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
----- Original Message ----- From: "Bob Tilley" <btilley@mchsi.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Tuesday, September 05, 2006 1:23 PM
Subject: [FlyRotary] Intake Tubing
Ed,
Where did you get the tubing that you used to make your intake manifold? I am trying to form one now and time is getting short for when I will need to have a completed manifold.
Bob Tilley
Cozy
Albany, Ga.
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