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  #1  
Old 09-12-2018, 08:07 PM
Jbon Jbon is offline
 
Join Date: Nov 2015
Location: DFW
Posts: 50
Default Pitot tubing problem

I'm in the process of converting from steam gauges to a SkyView system in my RV-6, and am ready to provide a pitot source to the ADAHRS. the original pitot line behind the panel is soft aluminum, 1/4", I believe. I need to supply the Garmin G5 at the panel, and then route a polyethylene line aft to the ADAHRS. Does anyone know of a fitting to go from aluminum tubing to poly? If not, any ideas on how to otherwise interface the two?

Thanks!
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  #2  
Old 09-12-2018, 08:25 PM
BillL BillL is offline
 
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Location: Central IL
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I believe you can use the same push on fittings from Cleaveland tools and Stein air to connect the two. All of those fittings are not made the same, though. Premium parts use a stainless steel "one way" retention spring, but some don't and can slip off.

For my pitot with 3/16 aluminum tune I used a AN fitting and flare, then NPT to push-on adapter.
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Last edited by BillL : 09-13-2018 at 06:52 AM.
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  #3  
Old 09-12-2018, 08:50 PM
Jbon Jbon is offline
 
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I guess the first thing I need to figure out is the size of my existing aluminum tubing. Is it measured by O.D. or I.D.? Also, what is a "Unfitting"

Thanks
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  #4  
Old 09-12-2018, 09:02 PM
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Sam Buchanan Sam Buchanan is offline
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Location: North Alabama
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Quote:
Originally Posted by Jbon View Post
I guess the first thing I need to figure out is the size of my existing aluminum tubing. Is it measured by O.D. or I.D.? Also, what is a "Unfitting"

Thanks
It is probably 1/4" tubing. A solution that has worked for a couple of decades in my RV-6 is joining the two tubes together with a piece of 1/4" rubber hose. This is very low tech but works nicely. If you ever need to disconnect the junction just split the rubber hose and reconnect with a fresh piece. I find neoprene fuel line from the local auto emporium is a good fit, no need for clamps.
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  #5  
Old 09-12-2018, 09:26 PM
Jbon Jbon is offline
 
Join Date: Nov 2015
Location: DFW
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Thanks for the response Sam. Seems like using the rubber hose to connect would work well for joining two aluminum tubes, but I need to connect the aluminum to a poly line. I wonder if this would work, given the softness of the poly tubing?
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  #6  
Old 09-12-2018, 09:34 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Los Angeles
Posts: 558
Default Easy

I just heated up the plastic tube with a heat gun and slipped it on the aluminum tude. In my case the aluminum tube was from the pitot static sensor. A little safety wire keeps it all secured.
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  #7  
Old 09-12-2018, 10:11 PM
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Sam Buchanan Sam Buchanan is offline
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Quote:
Originally Posted by Jbon View Post
Thanks for the response Sam. Seems like using the rubber hose to connect would work well for joining two aluminum tubes, but I need to connect the aluminum to a poly line. I wonder if this would work, given the softness of the poly tubing?
Works fine for the poly tubing if it is the same OD as the aluminum. Make your rubber splice hose about 3" long. After pushing everything together you won't be able to pull it apart.
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  #8  
Old 09-13-2018, 06:54 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
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Quote:
Originally Posted by Jbon View Post
I guess the first thing I need to figure out is the size of my existing aluminum tubing. Is it measured by O.D. or I.D.? Also, what is a "Unfitting"

Thanks
The wonder of spell help. [and poor proofreading ]

AN fitting , and mentioned tubing of these sizes are typically described by external diameter.
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  #9  
Old 09-13-2018, 01:57 PM
Robert Anglin Robert Anglin is offline
 
Join Date: Mar 2008
Location: houston, texas
Posts: 900
Default Safe Air one.

We had put in aluminum to begin with, but once we got to installing a modern glass panel, we found it easer to just pull it all back out. Then we got one of the Safe Air pitot static line kits and put their lines and fittings in. With their quick connect fittings, it make it so easy now to change or service our panel or heated, AOA pitot static system. You just slide the tubing into the fittings or push the release to uncouple it from the fitting. Our panel and our heated pitot tube come out in minutes to be serviced now. If you add a "G-5" or AHDAR" down the road you just splice in and install a tee fitting wherever you need.

Just an idea here, Yours, R.E.A. III # 80888

Last edited by Robert Anglin : 09-14-2018 at 09:08 AM.
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  #10  
Old 09-13-2018, 02:35 PM
John Tierney John Tierney is offline
 
Join Date: Jan 2006
Location: Salem, WI
Posts: 250
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Stein has some conversion fittings. If the link below doesn't work just go to Stein's website and search Pitot.
https://www.steinair.com/page/2/?sea...sttype=product
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