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Old 10-24-2018, 05:51 AM
daddyman's Avatar
daddyman daddyman is offline
Join Date: Jan 2014
Location: Fredericksburg, Virginia
Posts: 246
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?

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Old 10-24-2018, 06:04 AM
Lufthans's Avatar
Lufthans Lufthans is offline
Join Date: Dec 2017
Location: Hilversum, The Netherlands
Posts: 58

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 Teijgeler
Hilversum, The Netherlands

Preparing to build a Rocket
PH-BRR Bowers Fly Baby; Imported and upgraded
PH-MGA Jodel DR1050; Built, with Subaru EJ25
PH-SUM RV-4; Imported and upgraded. Sold my share :-(
PH-EIL RV-4; Imported and upgraded for friend. Sadly crashed
PH-ERD Robin DR300; Built with Subaru EZ30 for friend.
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Old 10-24-2018, 08:26 AM
JonJay's Avatar
JonJay JonJay is offline
Join Date: Jan 2007
Location: Battleground
Posts: 4,181

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....
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
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Old 10-24-2018, 08:36 AM
rv7charlie rv7charlie is online now
Join Date: May 2006
Location: Pocahontas MS
Posts: 3,780

Here you go:
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Old 10-24-2018, 12:40 PM
Ralph Inkster Ralph Inkster is offline
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 492

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.
Maintain lots, upgraded - repaired - & modified more, rebuild a few, & built some too.
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Old 10-24-2018, 01:18 PM
rocketbob's Avatar
rocketbob rocketbob is offline
Join Date: Jun 2006
Location: 8I3
Posts: 3,238

1/2" polyethylene tubing from the plumbing supply section at your local hardware store works great.
Bob Japundza CFI A&PIA
N55BC RV-6 borrowed, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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