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07-23-2013, 07:17 AM
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Join Date: Oct 2009
Location: Newark, IL
Posts: 287
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Static test - Alternate Static Source
I placed a -4 AN 832 bulkhead union through the IP, tee'd it into the static system, and placed an AN929 screw cap on the end of the bulkhead fitting. The cap is lubed with fuel lube and tightened finger tight. Loosening the cap in flight provides alternate static source in the event that both static ports are plugged, and it also provides an easy connection for static system leak tests. - Roger
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07-23-2013, 07:22 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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A flared fitting will not seal reliably unless it tightened with a wrench.
Do not use "fuel lube" on ANY flare fitting (especially true for fuel).
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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07-23-2013, 12:21 PM
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Join Date: Oct 2009
Location: Newark, IL
Posts: 287
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Fuel Lube question ??
Hi, Walt!
Thanks for the prompt reply. Not sure I understand your rationale...
In this application the Fuel Lube (actually EZ Turn) is used to create a seal at low torque values. Remember we are talking about air at less than one atmosphere here. The EZ Turn also prevents the cap from vibrating loose when it is open, and makes for more consistent torque when finger tightening it.
From personal experience, EZ Turn on flare nuts appears to prevent galling of the anodized aluminum nut and fitting. I do not use it to lubricate the flare.
I really would be glad to understand the rationale behind your cautions and learn from your vast experience.
Copied from Spruce's description of EZ Turn...
"EZ Turn is a specialty lubricant/sealant used for fuel and oil line valves & is resistant to high temps. Especially effective where high octane fuels and aromatics are present. EZ Turn is also extremely efficient as a gasket paste & anti- seize agent. EZ Turn will not gum, crack or dry out. Each shipment is independently tested. Excellent for tapered plug valves, aircraft engine manufacturing, and marine applications. EZ Turn is the functional equivalent of fuel lube. 1 Lb. can "
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07-23-2013, 02:45 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Well, personally, I've not found a good use for fuel lube except to make a sticky mess on anything you use it on. It also won't clean up with any solvent I use and will not desolve in fuel or oil, hence my caution on using it around fuel systems. I'm really just not sure what it's ideally suited for.
My philosphy is simple, use "hardware" for it's intended purpose, don't try to invent a new way of doing things (refer to the bible 43-13).
Flared fittings don't need sealant or antisieze, they just need to be properly torqued to seal (and so they won't fall off).
If you want an alternate air source, use an alternate air switch available from many sources.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
Last edited by Walt : 07-23-2013 at 03:30 PM.
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07-23-2013, 03:18 PM
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Join Date: Oct 2009
Location: Newark, IL
Posts: 287
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Thanks, Walt,
Yes, it's messy. IIRC, isopropyl alcohol cuts it. Other uses >> ??... use as a temporary adhesive to hold small gaskets in place against gravity until the mating part can be installed and secured?? ...?? helps determine who has been fiddling with your toolbox after hours?? (fingerprints everywhere) ?? sticks four AN washers together when adjusting control horn bolt spacing. Baby oil works better on the waterbed, but is almost as hard to clean off. So I hear  .
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07-23-2013, 03:39 PM
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Join Date: Jan 2008
Location: Atlanta, GA
Posts: 240
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I use it to hold washers to my fingertip when installing them in particularly difficult places.
Oh, and we used some sunday when someone's cessna ended up in a ditch, on a piece of tape to tape up his fuel vent which was leaking
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Ian
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07-23-2013, 03:46 PM
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Join Date: Jun 2005
Location: Cedar Park, TX
Posts: 3,156
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Denatured Alcohol kills Fuel Lube
Quote:
Originally Posted by RKellogg
Thanks, Walt,
Yes, it's messy. IIRC, isopropyl alcohol cuts it. Other uses >> ??... use as a temporary adhesive to hold small gaskets in place against gravity until the mating part can be installed and secured?? ...?? helps determine who has been fiddling with your toolbox after hours?? (fingerprints everywhere) ?? sticks four AN washers together when adjusting control horn bolt spacing. Baby oil works better on the waterbed, but is almost as hard to clean off. So I hear  .
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Excellent! You just sent me running to the shop. I don't know about isopropyl, but I have quarts of denatured alcohol in the shop (also good for cleaning and not killing our canopies), and I do use fuel lube for stuff that would probably appall Walt, like temporarily sealing a static suction cup. Denatured alcohol does cut it. New to me. A gob stuck or smeared on a big piece of RV8 fuselage aluminum, all the way down to, "Oh, no, I just accidentally stuck my finger in this 1lb can of fuel lube that my grand children will still be trying to use up." No more sticky fingers.
Fuel lube + Alcohol = good buddies! Alcohol + fuel lube = ?? too much alcohol ?? The kind banter provides value.
Oops, I didn't get it all off, now my keyboard is sticky, I wonder what alcohol does to abs plastic, wait, I know that answer already  .
__________________
Scott Card
CQ Headset by Card Machine Works
CMW E-Lift
RV-9A N4822C flying 2200+hrs. / Cedar Park, TX
RV8 Building - fuselage / showplanes canopy (Done!)
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07-23-2013, 04:51 PM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by scard
Fuel lube + Alcohol = good buddies! Alcohol + fuel lube = ?? too much alcohol ?? The kind banter provides value.
Oops, I didn't get it all off, now my keyboard is sticky, I wonder what alcohol does to abs plastic, wait, I know that answer already  .
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Good info, my usual cut everything solvent MEK won't touch the stuff so I usually just end up repeatedly wiping it on my pants then when I get home: "Honey can you wash these for me, I got something on them that just won't come off" 
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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07-23-2013, 05:46 PM
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Join Date: Aug 2009
Location: Redding,Ca
Posts: 633
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Fuel lube
Makes a dandy plug in your injectors if you leave a small booger of it anywhere in the fuel system.
Seals real well and won't dissolve!
Anything that needs fuel lube on it in the fuel system should have a very thin film only.
Tim
Paid 2013!
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07-24-2013, 07:09 AM
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Join Date: Oct 2009
Location: Newark, IL
Posts: 287
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Fuel Lube plugs small orfices in fuel system... yikes!
Tim's point about Fuel Lube not dissolving in fuel, and plugging fuel system orifices is ironclad rationale for Walt's Rule about never using Fuel Lube (or EZTurn) on the flare of tubes / hoses for fuel or oil systems. Every fuel system has small orifices, plugging one with a small booger of Fuel Lube could certainly ruin your entire day... Thanks, Tim! Thanks, Walt, for sharing your knowledge base!
?? It's puzzling/scary that both of these products were developed for sealing and lubricating tapered plug valves in fuel systems... perhaps with care to minimize amount used it doesn't create problems.??
- Roger
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