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05-13-2015, 03:22 PM
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Join Date: Apr 2015
Location: Vail, Arizona
Posts: 33
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I took a shot. I'll um.....be back in the corner reading if ya need me.
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05-13-2015, 04:18 PM
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Join Date: Nov 2007
Location: Cary, N.C.
Posts: 1,216
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IN and OUT on the primer solenoid are reversed from recommended directions.
__________________
Noel
RV-6A N6NF
tip-up
flying
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05-13-2015, 04:31 PM
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Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,393
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Copper Tubing
Copper tubing was used extensively by light aircraft manufacturers well into the 50's maybe later. Perhaps most commonly found on Pipers. Nearly all the Piper hoses, lines fittings etc in the 40's and 50's was non aircraft.
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05-13-2015, 06:10 PM
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Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
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the solution???
...so, if all my primer lines are copper, what's the better practice?
Is aluminum better somehow?
seems other hi-temp materials are already 'hard', stainless, steel....so should they be tiny firesleeved flex lines?
inquiring minds need to know! 
__________________
Perry Y.
RV-9a - SOLD!....
Lake Country, BC
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05-13-2015, 11:33 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by Walt
That was quick and Mike wins a beer at Osh!
This picture makes it a little clearer whats going on... the feed is from the back like Mike indicated, this was just acting large pass through heat sink, with no filtering.
The worst part is this was on a very old RV6 with sloshed tanks and this was the only filter except for the carb inlet where I found debris, been overlooked for probably 20+ years 
(true teflon tape is also a good find and missing firesleeve clamps)

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Either the airplane isn't actually 20 years old or the fuel system has been upgraded, because that version of the gascolator has only be availabe for about 10 years or so.
Regardless, I guess who ever installed it was totally blind to the arrows.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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05-13-2015, 11:37 PM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by jrs14855
Copper tubing was used extensively by light aircraft manufacturers well into the 50's maybe later. Perhaps most commonly found on Pipers. Nearly all the Piper hoses, lines fittings etc in the 40's and 50's was non aircraft.
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Actually Piper was still using it at least into the early 80's on there primer systems.
Installed correctly, it is a valid method, though it seems to always require more than its share of repairs/maint.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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05-14-2015, 04:20 AM
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Join Date: Mar 2006
Location: Kyle, TX
Posts: 566
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Is that Teflon tape on the connections?
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Fred Magare
GySgt, USMC (Ret.)
PP-ASEL, A&P
Frederic.magare "at" gmail.com
 RV-9A Firewall Forward
[Engine purchased]
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05-14-2015, 05:25 AM
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Join Date: Dec 2005
Posts: 917
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I was about to make a snide comment, but then I realized I learned a thing or two (or three  ) on this thread.
Note to self: hold the snide comments until you have been turning wrenches on airplanes more than a couple years, noob! 
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Mike C.
Sierra Nevada
RV-6A bought flying
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05-14-2015, 06:05 AM
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Join Date: Dec 2004
Location: Southlake, Texas
Posts: 626
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Gascolator
The fix would be to install a decent filter and eliminate the un-necessary gascolator. On the trail dragging RV-6 the low point in the fuel system is the tank drains, so a gascolator mounted anywhere on the firewall is up-hill from the low point and only serves as a poor filter and a heat sink for vapor lock.
There is a lot of grandfather worship in what some builders do. Certified Grumman aircraft, like the AA1-A Yankee I owned for 23 years, do not have gascolators for the same reason. The low point in the fuel system is the tank drains.
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Danny King
Beautiful Doll 80434 TT 1675 hours
I0360 A1B6 200 HP
Christen Inverted Oil
First Flight 12 July 2000
VAF Dues current for 2020
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05-14-2015, 08:21 AM
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Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 9,035
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Quote:
Originally Posted by Danny King
The low point in the fuel system is the tank drains.
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On an RV-7 or 9 with a fuel system built per plans the system low spot is the line running between the fuel selector valve and the gascolator (on airplanes with carbed engines).
Gascolators were never specifically designed to only be installed at system low points (though they are sometimes installed that way). By design, they induce an artificial low point in the system. The tank drains are the best first line of defense for removing water and contaminants but it is not a guarantee because water and contaminants can get trapped in outer bays of the fuel tank and only makes its way to the area of the tank drains in flight. It is for that reason it is a good idea to have something downstream in the fuel system to capture water, etc.
__________________
Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.
Scott McDaniels
Van's Aircraft Engineering Prototype Shop Manager
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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