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  #1  
Old 04-25-2013, 09:46 PM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,492
Default Homebuilt Pitot Tube

Here's the pitot tube I made for my RV-3B.



The tube part is 3/16" stainless tube, and the mast is a section of aluminum jury strut extrusion. The mast is 1.125" chord and about 3/8" thick.

The tube is held in mechanically and sealed with JB Weld. Above the 1/8 NPT sensor connection hole, the tube portion of the mast is sealed with JB Weld too. I used the marine version of the epoxy, which is compatible with aluminum.

The whole assembly, which weighs 95.1 grams, is attached to the wing by a plastic clamp just below the tapped sensor hole that screws to a bracket attached to a main rib. Then another small bracket, riveted to the main rib, screws to the hole at the top of the mast, a little hard to see in the photo. The bottom bracket and the plastic clamp weigh 35.2 grams, and the small bracket at the top weighs 10.0 grams.. In U.S. units, that's 4.95 ounces for this and the rest of the bracketry and nutplates.

In this photo, there's still some clean-up and smoothing to do. This photo didn't show it, but it's what I found when I switched from TinyPic to Imgur.

Dave

Last edited by David Paule : 11-13-2019 at 07:43 PM.
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  #2  
Old 04-26-2013, 05:38 AM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 11,074
Default

Scrap bin design at it's finest. I love it. Nice work.
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RV-8 SS
Barrett IO-390
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  #3  
Old 04-26-2013, 07:14 AM
Larry DeCamp Larry DeCamp is offline
 
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 1,275
Default Whats the motivation ?

David, what motivated you to pursue such an elegant design. My rehab project has a round tube bent like an L and screws into the wing. Is there a known shortcoming of the ( stock kit design ? ) that I should address ?
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Larry DeCamp
RV3B sold
RV-4 fastback in process w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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  #4  
Old 04-26-2013, 09:45 AM
David Paule David Paule is offline
 
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,492
Default

The standard one ought to work just fine. I just wanted something a bit cleaner.

Dave
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  #5  
Old 04-26-2013, 05:17 PM
81270 81270 is offline
 
Join Date: Mar 2007
Location: Gold Coast - Australia
Posts: 137
Thumbs up Cool

Nice work... and you know it when it makes front page.
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Peter Vernon
Eagle Heights, Queensland, Australia
RV8, QB Wings, Standard Build Fuse (85% @ April 12)
email: pve95448@bigpond.net.au

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