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  #1  
Old 09-06-2016, 05:56 PM
Barneybc12d Barneybc12d is offline
 
Join Date: Nov 2013
Location: Belleville, il
Posts: 124
Default Duplex fuel valve

b

Has anyone installed a duplex fuel valve in a 14? Any pictures?
This is a picture of the right side fuel line. The hole with a center hole in the above picture seems to be intended for a return line.
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14A #140111
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  #2  
Old 09-06-2016, 11:07 PM
Aircraft Specialty Aircraft Specialty is offline
 
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 460
Default

Quote:
Originally Posted by Barneybc12d View Post
b

Has anyone installed a duplex fuel valve in a 14? Any pictures?
This is a picture of the right side fuel line. The hole with a center hole in the above picture seems to be intended for a return line.
Although there is no mention of this in the plans that we could find..this does appear to be the case.

Here are some pictures of a duplex installation that was done months ago on a customer RV-14.

Happy building,
Steve



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Steve Tschurwald- Aircraft Specialty LLC (Your source for Custom Parts for Experimental Aircraft), AS FLIGHTLINES (Joint Venture with TS Flightlines)

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  #3  
Old 09-07-2016, 06:45 PM
Barneybc12d Barneybc12d is offline
 
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Location: Belleville, il
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Default

Thanks for the pictures Steve. I see a pile of misbent tubing in my future.
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Barney Johnson
14A #140111
started build 12/24/13
Empennage done, wings done, fuselage done, finish kit in progress.
Dormant 2017, 2018,2019
Back at it 3/20
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  #4  
Old 09-07-2016, 08:03 PM
Mudfly Mudfly is offline
 
Join Date: Dec 2011
Location: Alpharetta, Ga
Posts: 212
Default Dumb Question

I have limited piston experience. What is a duplex fuel valve, and return line?
Thanks.
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RV-14A (140174)
www.myrv14build.blogspot.com
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  #5  
Old 09-07-2016, 08:29 PM
BobTurner BobTurner is offline
 
Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
Default

Some fuel injection systems require that you flow more fuel than needed; the excess needs to be returned to the tank that it came from. So the fuel selector needs to switch both the line to the engine, and the return line.
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  #6  
Old 09-08-2016, 06:27 AM
Mudfly Mudfly is offline
 
Join Date: Dec 2011
Location: Alpharetta, Ga
Posts: 212
Default

Quote:
Originally Posted by BobTurner View Post
Some fuel injection systems require that you flow more fuel than needed; the excess needs to be returned to the tank that it came from. So the fuel selector needs to switch both the line to the engine, and the return line.
Thanks Bob.
I'm not quite to that stage yet, but something I'll have to get "smart" on later.
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RV-14A (140174)
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  #7  
Old 09-08-2016, 09:05 AM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
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Barney--
Steve and I have several clients with duplex systems, a couple of which are still testing some, "custom" components. Yep, alot of tubing involved!
Tom
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  #8  
Old 09-10-2016, 07:39 PM
Aircraft Specialty Aircraft Specialty is offline
 
Join Date: Jan 2012
Location: Oconomowoc, WI
Posts: 460
Default

Quote:
Originally Posted by Barneybc12d View Post
Thanks for the pictures Steve. I see a pile of misbent tubing in my future.
Barney,

We don't offer it as a standard package. But, we do have all the dimensions and cad drawings to replicate that installation. We utilize a computerized tubing bender and are able to offer complete drop in rigid components for the -14. With that said, the duplex install is a bit different and we only did the lines from the valve to the wings. We don't have any other dimensions.

On the standard -14 installation with the included Andair non duplex valve, we have the complete drop in kit for all rigid tube components in the cabin.

Have a great week and if you have any questions about the install or things the customer did, please feel free to contact us.
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www.aircraftspecialty.com
www.asflightlines.com
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