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  #1  
Old 08-21-2019, 08:43 AM
Reflex Reflex is offline
 
Join Date: Jan 2015
Location: Kansas
Posts: 195
Default Any reson not to do it this way? (Pitot connections)

I've noticed that most builders are flaring the ends of the pitot/AOS assembly. I'm wondering if a push to connect is acceptable? I'm using a Garmin GAP-26 heated pitot. According to the installation manual, section 5.3, revision AJ, the minimum length for the tubes on the heated pitot is 8" to protect the non-metallic tubing from excessive heat.

If the tubing is greater than 8", do you see any reason not to use the fittings depicted below?

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Last edited by Reflex : 08-21-2019 at 09:00 AM.
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  #2  
Old 08-21-2019, 08:58 AM
Reflex Reflex is offline
 
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Default

Hoping the image shows up now.

I miss Tiny Pic!
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  #3  
Old 08-21-2019, 09:53 AM
PilotjohnS PilotjohnS is offline
 
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Location: Southwest
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Default simpler

I just heated up the tubing with a heat gun, slide it on and safety wired. easy peasey.

I think garmin recommends a distance of the metal before terminating; and this distance is longer than a straight section could be, so the Pitot tubing needs to bend, so the 90 degree fitting may not be the best.
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WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

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  #4  
Old 08-21-2019, 10:18 AM
rocketman1988 rocketman1988 is offline
 
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Default Fitting

Were you able to find a push on fitting for the 3/16? aluminum tubing?
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  #5  
Old 08-21-2019, 10:19 AM
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airguy airguy is offline
 
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Default

As long as your end-fitting can fit through the pitot mast and you can disconnect the tube fitting via the inspection plate, all is good.

I used a straight-run fitting to a ferrule-type connection to the tube, and left a service loop of tubing inside the wing to pull the entire pitot tube and connections down outside the wing and disconnect it that way.
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  #6  
Old 08-21-2019, 10:31 AM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
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Default

Quote:
Originally Posted by Reflex View Post
I've noticed that most builders are flaring the ends of the pitot/AOS assembly. I'm wondering if a push to connect is acceptable? I'm using a Garmin GAP-26 heated pitot. According to the installation manual, section 5.3, revision AJ, the minimum length for the tubes on the heated pitot is 8" to protect the non-metallic tubing from excessive heat.

If the tubing is greater than 8", do you see any reason not to use the fittings depicted below?

I am not seeing your image but I am using a push-on fitting with the same Garmin pitot heat tube and zero issues. I made sure to adhere to the 8" recommended metal tube.
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  #7  
Old 08-21-2019, 12:13 PM
Freemasm Freemasm is offline
 
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Location: Orlando
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Default Question?

Sorry. Not meant to be a thread hijack. I haven't found a manual for the GAP-26 and wasn't going to buy the pitot just yet. I assume but pressure sources need to be routed to the cockpit area. Asking because I'll be closing up the left wing soon and sounds like I need to run another soft AL tube and probably dedicated conduit. Any thoughts, ideas, or other suggestions (that would save me from another case of the dumb-***) would be appreciated.
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  #8  
Old 08-21-2019, 12:26 PM
Bavafa Bavafa is offline
 
Join Date: Oct 2007
Location: Sacramento, CA
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Quote:
Originally Posted by Freemasm View Post
Sorry. Not meant to be a thread hijack. I haven't found a manual for the GAP-26 and wasn't going to buy the pitot just yet. I assume but pressure sources need to be routed to the cockpit area. Asking because I'll be closing up the left wing soon and sounds like I need to run another soft AL tube and probably dedicated conduit. Any thoughts, ideas, or other suggestions (that would save me from another case of the dumb-***) would be appreciated.
If Garmin, you will need to run two sot or hard line, most people run soft lines. One is for your pitot tube and one for AOA. The AOA is not absolutely necessary but if using Garmin, then it would be a shame not to plumb that. I can hardly see a reason for a conduit, RV14 and many other models have small holes in the ribs for this usage.

Hope this helps.
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  #9  
Old 08-21-2019, 12:28 PM
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Walt Walt is online now
 
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Quote:
Originally Posted by PilotjohnS View Post
I just heated up the tubing with a heat gun, slide it on and safety wired. easy peasey.

I think garmin recommends a distance of the metal before terminating; and this distance is longer than a straight section could be, so the Pitot tubing needs to bend, so the 90 degree fitting may not be the best.
Heating up nylo tubing and pushing it onto a fitting will lead to the nylo tube cracking eventually. I've replaced plenty in the static system.
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  #10  
Old 08-21-2019, 01:06 PM
Reflex Reflex is offline
 
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Quote:
Originally Posted by rocketman1988 View Post
Were you able to find a push on fitting for the 3/16? aluminum tubing?
Yes, Legris makes one. Part number 3109 55 11 available at MSC Direct. MSC's part number is 06108591. 3/16 tube x 1/8" NPT elbow.

Spoke to Legris/Parker tech. Fine for aluminum tubing.

About $8.

Fred
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