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01-03-2007, 06:42 PM
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Join Date: Feb 2005
Location: Torquay, Victoria, Australia
Posts: 826
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related post "Exhaust smell when powered back"
There is connection between this thread and Kelly's thread "Exhaust smell when powered back".
http://www.vansairforce.com/communit...ed=1#post95438
The exhaust smell and the fuel smell have both occurred when throttle back and entering the circuit.
It has also prompted me to remember that I once had a warning from my CO monitor and it too occurred on downwind leg.
This all seems to confirm that there is a change in airlfow into the cockpit when reducing power and speed to enter the circuit.
Pete.
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Peter James.
Australia Down Under.
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01-04-2007, 08:25 PM
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Join Date: Sep 2005
Location: Maple Grove, MN
Posts: 2,334
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Angle of attack is larger at slower speeds. Somehow, that curls airflow in a way that it gets in the cockpit. Don't know if it is the flap holes or where, but it gets in.
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Alex Peterson
RV6A N66AP 1700+ hours
KADC, Wadena, MN
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01-18-2007, 05:49 PM
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Join Date: Sep 2005
Location: Willits,Ca
Posts: 60
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gas smell
I have had the same problem and found that the quick drain on the right side was leaking a few drops of gas. it wasn't until I used some fuel lub on the "O" rings that it stopped.
Gas lub is a fuel prof lubrication that will not desolve in gasoline
Marvin RV8A
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11-03-2008, 08:17 PM
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Join Date: Feb 2005
Location: Marion, MA
Posts: 236
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Quote:
Originally Posted by Captain_John
Paul, one thing that nobody has mentioned is that the rudder cables could have sliced into the vent line(s).
This has been a problem with the -4's and as I recall, the -8's are similar.
Might want to check that. Can't hurt any!
 CJ
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The 4's and 8's are not the same. Yes it could and has happened on 4's, but I don't see how this could happen on the 8's. They are buried in the gear boxes nowhere near the rudder cables. (just wanted to clear that up).
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Dave "WS" Rogers
RV-8 N173DR
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11-03-2008, 09:19 PM
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Join Date: Feb 2006
Location: Sisters, OR
Posts: 179
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Fuel tester
Paul -
The only time I have had a fuel smell I isolated it to the fuel tester stored behind my seat. I only seemed to get a wiff on landings and always soon after fueling. I left it behind in the hangar a couple of times to test my theory and the odor did not appear.
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Mike Macon
RV6A
Carbon Cub EX
VAF #201
Last edited by Mike Macon : 08-03-2014 at 02:31 PM.
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11-04-2008, 04:45 AM
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Join Date: Jan 2005
Location: Atlanta, GA
Posts: 2,295
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I wouldn't doubt that Paul's conclusion is on the money.
I know that if I top my tanks off and park the plane they will leak fuel out of the vents when the plane is parked. This is very common. This is why whenever I fill up at the nearby cheap airport I always try to remember to swap tanks on the way home even though it's a 5 minute flight. No sense wasting that liquid blue gold. :-)
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"What kind of man would live where there is no daring? I don't believe in taking foolish chances but nothing can be accomplished without taking any chance at all." - Charles A. Lindbergh
Jamie | RV-7A First Flight: 7/27/2007 (Sold)
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06-22-2009, 08:06 AM
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Join Date: Jan 2007
Location: Marion, Ohio
Posts: 91
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Fuel smell in cockpit RV4
I, also, thought I was smelling to much fuel. Full tanks, high angle of attack seemed to be the worst. I was constantly checking the fuel system. In the middle of this, I replaced the fuel selector valve. I did find a small seep at the new valve and fixed it. Last Saturday, I couldnt fly because of low clouds, wind and rain in the area - it was cool temps. I was sitting in the seat working on my GPS when the sun came out and quickly warmed the uninsulated tin roof to the hanger. Shortly after, I heard a girgle-girgle-SPIT. Fuel squirted on my bare leg! (had shorts on) The fuel vent was broke at the very top of the loop. So, I am embarrased to say, the left fuel tank was venting into the cockpit! The alum tubing must have been over stressed when the 180 degree bend was made. The moral of this story is obvious... hope this helps out in RV land.
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Skipper RV7
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06-22-2009, 11:34 AM
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Join Date: May 2006
Posts: 532
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Fuel Lube
Quote:
Originally Posted by Marvin
I have had the same problem and found that the quick drain on the right side was leaking a few drops of gas. it wasn't until I used some fuel lub on the "O" rings that it stopped.
Gas lub is a fuel prof lubrication that will not desolve in gasoline
Marvin RV8A
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I'm not familiar with "fuel lube", but would like to try it on the O-ring on my fuel caps. Can you tell me where to get it and under what trade name(s)?
Thanks,
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06-22-2009, 11:52 AM
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Join Date: Feb 2005
Location: Navarre, FL
Posts: 168
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Fuel Lube
Dean -
Fuel Lube appears to be unavailable these days. EZTurn is available in tubes and tins from Wicks, AC$, etc.
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Neal George
Navarre, FL
CherokeeJet N9586J
RV-7 N8ZG (all the loose ends)
Continental Aerospace Technologies, Product Support
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06-23-2009, 10:39 AM
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Join Date: Jun 2007
Location: Rhode Island
Posts: 937
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Don't do it, too sticky!
I have some experience with some fuel caps whose O-rings were "lubricated" with EZ-Turn Fuel Lube. I say "Lubricated" because the stuff is like a cross between honey which has been boiled for an hour to make it twice as thick and sticky, and spray adhesive. The stuff is WAY sticky, and does not lubricate at all. This made the fuel caps almost impossible to remove. If I'm not mistaken, O-rings need to be lubricated to slide well, so that they seal properly. In the process of leak-checking my tanks, my fuel caps leaked with the EZ-turn on them. After cleaning all this gunk off there, I applied some light oil to the O-rings, and walla, the caps sealed fine. My theory is that the O-rings were unable to slide when they were expanded via the cam-lock mechanism of the fuel cap, leading to the leaks.
The stuff is great for sealing pipe threads in the fuel system, but I don't think it's appropriate for O-rings. If I'm all wet about the light oil being the most appropriate thing to use on fuel cap O-rings, somebody please chime in and correct me.
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Highest Regards,
Noah F, RV-7A
All men dream, but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men? for they may act their dream with open eyes, to make it possible. -T.E. Lawrence
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