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  #11  
Old 10-30-2011, 07:01 AM
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Geico266 Geico266 is offline
 
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Originally Posted by DAGO View Post
Larry,

I don’t know anything about -10 construction, however, would this trouble shooting procedure work??? Connect some plastic tubing to the end of each fuel vent. Run each line of tubing down the fuselage centerline and past the trailing edge of the wing. Mount the tubing with speed tape or equivalent. Conduct a test flight.
That is an interesting test. Thanks.
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  #12  
Old 10-30-2011, 09:47 AM
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Mike S Mike S is offline
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Quote:
Originally Posted by DAGO View Post
Larry,

I don?t know anything about -10 construction, however, would this trouble shooting procedure work??? Connect some plastic tubing to the end of each fuel vent. Run each line of tubing down the fuselage centerline and past the trailing edge of the wing. Mount the tubing with speed tape or equivalent. Conduct a test flight.
If you do this, keep in mind the stock fuel vent has a slash cut to face into the airstream, thus creating a slight pressure in the vent line.

Tubing taped to the fuse C/L could easily create a low pressure in the tubing, depending on how the end of the tube is facing.
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  #13  
Old 11-03-2011, 11:19 AM
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Geico266 Geico266 is offline
 
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Quote:
Originally Posted by Mike S View Post
If you do this, keep in mind the stock fuel vent has a slash cut to face into the airstream, thus creating a slight pressure in the vent line.

Tubing taped to the fuse C/L could easily create a low pressure in the tubing, depending on how the end of the tube is facing.
Good point.
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  #14  
Old 11-03-2011, 03:33 PM
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MSFT-1 MSFT-1 is offline
 
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Default I have this issue on my RV-10

Typically smell it when the tanks are very fully and I am turning and descending at the same time (ie base to final).

Definitely related to how much fuel is in the tanks since it only happens with full tanks.
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  #15  
Old 02-12-2012, 10:04 AM
N427EF N427EF is offline
 
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Default Fuel smell

Has anyone found a cure for the fuel smell on landing?
About 33 hours into phase one, I have noticed the fuel smell upon entering the pattern most of the time. It is very faint and mostly with the tanks near full.
Glad I new about it from this thread as it was somewhat disconcerting
when I got my first whiff of fuel while landing.
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  #16  
Old 02-12-2012, 05:38 PM
Wayne Gillispie Wayne Gillispie is offline
 
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Default No fuel smell on mine

I have tested uncoordinated/steep turns and -.5 G's with 25+ gallons fuel.

I have sealed spar pass throughs with foil tape. Sealed aileron pushrod with Abby's boots. Prosealed bottom skin to side skin joint. Prosealed bottom wing root fairing, as it does not need to be removed for inspections. Prosealed around snap bushing at vents.

Cabin is always under negative pressure unless front and rear vents are wide open on mine. Any fuel leaks from firewall to tanks will end up in the cabin.
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  #17  
Old 02-12-2012, 05:58 PM
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Geico266 Geico266 is offline
 
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I can't help but think this contributed to Todd's incident.

Sure would be nice to find a cure.

Ideas -10 drivers?
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  #18  
Old 02-12-2012, 06:40 PM
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Bill.Peyton Bill.Peyton is offline
 
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As Wayne stated, the cabin has negative pressure and will suck anything inside that is close, such a raw gas and fumes. Maybe the vents need to be relocated outboard of the tank. That's where they are on my Archer. Alternatively, extending the vent into the slipstream more by extending them an inch or so may help.
Those who notice this problem report it when turning or descending, could this imply that the vent pickup is to low in the tank and is easily submersed? I purchased the QB wings, so I am not intimately familiar with the placement, or the builders flexibility with the placement of the vent inside the tank.
Has anyone with this issue spoken to Vans?
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  #19  
Old 02-12-2012, 09:03 PM
Wayne Gillispie Wayne Gillispie is offline
 
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I ran my 1/4" vent as close to top of tank as possible by putting a bend in the end. If my tanks over flow from expansion you don't want to remove caps as the fuel is near the outside of filler necks. Just drain a little from quick drains.

I think with tubing running from outboard to inboard this helps keep fuel in the tank during a slipping or skidding turns. If the vent was exiting outboard more fuel would be lost during slipping turns, but it would exit at a more favorable location. I like the idea of extending it another inch.

With all of the precautions I have taken after hearing of this problem not just with the -10, I have no fuel vapors entering the cabin. I also ran my combustible gas leak detector during initial test flights.
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  #20  
Old 02-12-2012, 10:26 PM
N427EF N427EF is offline
 
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I can only suspect the vents since I have no fuel leaks anywhere.
Happens with full tanks only.

Taping all the openings seems like a good fix.
Relocating the vents would be a true solution.
Maybe route them outboard to the first inboard inspection bay?
Don't want to make my passengers nervous.

Flew 3 hours today and returned to the airport with 10 gallons total, no smell.
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