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Old 10-24-2018, 06:51 AM
daddyman's Avatar
daddyman daddyman is offline
 
Join Date: Jan 2014
Location: Fredericksburg, Virginia
Posts: 232
Default Short run of PVC tubing inside ribs?

Hi all,
I was thinking of running my additional pitot tubes from out near the right wing inspection port.
Because of the location of the fuel tanks, I need to run the pitot tubes (2) aft of the spar.
There are some lightening holes within the ribs that come all the way into the cabin near the pushrod.

Choice A): simply run the pitot tubes near the push rods.

Choice B): extend 1/2" inside diameter PCV through the lightening holes to run the pitot tubes and possible wires later) without fear that simply touching the rib inside edge will cut them. The rib insides are razor sharp.

The added weight would be approximately 6 oz, and make for a heavier right wing by the 6-8 oz.
If that could be an issue I could add the exact weight to the left wing.

Question: Is there a better way?

Am I nuts for this idea?

Daddyman
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  #2  
Old 10-24-2018, 07:04 AM
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Lufthans Lufthans is offline
 
Join Date: Dec 2017
Location: Hilversum, The Netherlands
Posts: 43
Default

You'll never notice the 6-8 oz.

You'll have more difference than that because of your pitot tube on one side. Or if you carry one gallon of fuel extra on one side.

Don't worry about this. You'll be fine.

Hans
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PH-SUM RV-4; Imported and upgraded.
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  #3  
Old 10-24-2018, 09:26 AM
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JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
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I used a composite carbon fiber tube I sourced from TAP plastics in Portland Or.
Thinner wall, lighter, stronger, and matte black, not that it matters, but I couldn’t get over looking at plumbing pipe in my wing. Just me....
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Old 10-24-2018, 09:36 AM
rv7charlie rv7charlie is offline
 
Join Date: May 2006
Location: Pocahontas MS
Posts: 3,150
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Here you go:
https://www.techflex.com/general-purpose/f6-woven-wrap
or
https://www.techflex.com/general-purpose/clean-cut
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  #5  
Old 10-24-2018, 01:40 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 420
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Used some 5/8 black PVC tubing used for underground sprinklers, great stuff, thin wall & cheap, $8 for 50'.
Use tie wraps to secure it to the sides of the lightning holes to keep clear of control links.
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Maintain lots, upgraded & repaired some, modified more, rebuild a few, & built 4 of 'em
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  #6  
Old 10-24-2018, 02:18 PM
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rocketbob rocketbob is offline
 
Join Date: Jun 2006
Location: 8I3
Posts: 3,027
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1/2" polyethylene tubing from the plumbing supply section at your local hardware store works great.
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