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  #1  
Old 06-04-2014, 08:05 AM
Hansgiant Hansgiant is offline
 
Join Date: Apr 2013
Location: Johannesburg South Africa
Posts: 14
Question Fuel smell whilst flying

Anyone else had this situation :-

Over the last couple of flights I am sure that I can smell fuel.
Does anyone know where it could be coming from as I have inspected the tank and seen nothing.
The strange thing is that I can only smell fuel when flying and not when the aircraft is in the hangar.

Any Ideas?
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  #2  
Old 06-04-2014, 08:51 AM
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MartySantic MartySantic is offline
 
Join Date: Apr 2008
Location: Davenport, IA
Posts: 1,390
Default

Yes. A few have reported similar.

See my post here..... http://www.vansairforce.com/communit...ighlight=smell

Also search this forum with the word SMELL, and you will get some of the other posts.
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  #3  
Old 06-04-2014, 09:32 AM
roger lee roger lee is offline
 
Join Date: Sep 2013
Location: Tucson, AZ
Posts: 322
Default

Many I see with fuel smells while flying have come from a leaking carb bowl. Check the drip tray or carb bowl bottom. This is fairly common.
The forced air coming into the cowl area forces the smell right into the cockpit.
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  #4  
Old 06-04-2014, 11:40 AM
apatti apatti is offline
 
Join Date: Dec 2005
Location: Middle Georgia
Posts: 654
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In my case, it was a slightly loose connection to the electric fuel pump. I only smelled fuel when the boost pump was on during takeoff and landing. No dripping or blue stain. Just the odor.
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  #5  
Old 06-04-2014, 12:56 PM
Hotscam Hotscam is offline
 
Join Date: Mar 2011
Location: Bosschenhoofd, Netherlands
Posts: 160
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We bad the same problem and could not find the cause.
Even took the tank out and repressure tested it. No leaks.
Turned out to be the hose clamps around the filler neck.
Like the carb air filters they tend to become loose as the rubber compresses in time.
The smell just came with a full tank during flight when the fuel is moving in and out if the neck.
Simple to solve but hard to find.
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  #6  
Old 06-04-2014, 03:48 PM
steve murray's Avatar
steve murray steve murray is offline
 
Join Date: Jan 2005
Location: Flat Rock, North Carolina
Posts: 375
Default

Quote:
Originally Posted by Hansgiant View Post
Anyone else had this situation :-

Over the last couple of flights I am sure that I can smell fuel.
Does anyone know where it could be coming from as I have inspected the tank and seen nothing.
The strange thing is that I can only smell fuel when flying and not when the aircraft is in the hangar.

Any Ideas?
When I top off my RV8 there is a distinct fuel smell while taxing\takeoff, only happens when the tanks are topped off. Not sure if this is applicable to your situation?
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  #7  
Old 06-04-2014, 07:29 PM
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Jetguy Jetguy is offline
 
Join Date: Aug 2008
Location: Texas, Fort Worth
Posts: 1,237
Default On float in carb not floating!

Had one carb float stop floating. Fuel would come out the tube on right side of right carb in flight. Engine ran fine but smelled fuel during flight. On the ground with top cowl off could see fuel coming out tube with engine running..
Here is a link to my post back in 2010.

http://www.vansairforce.com/communit...t=Float&page=2
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  #8  
Old 06-04-2014, 08:41 PM
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sirlegin sirlegin is offline
 
Join Date: Feb 2006
Location: Keller, Texas
Posts: 311
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Wash your hands?
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  #9  
Old 06-04-2014, 11:01 PM
Rodney Rodney is offline
 
Join Date: Oct 2012
Location: Friendswood, TX
Posts: 74
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I had fuel smell in the cockpit both airborne and while on the ground. Traced it to a leaking O ring on the fuel selector panel between my feet. Changed the O ring and smell disappeared.
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  #10  
Old 06-04-2014, 11:37 PM
Steve Barnes Steve Barnes is offline
 
Join Date: Jul 2008
Location: Santa Rosa, CA
Posts: 583
Default Both my RV4 and RV6 have it

I have 2500 hours in these things and I have consistently got fuel smells occasionally while flying. Especially with topped off fuel tanks or in turbulence or aerobatics.

Where my smell comes from is the vent lines. The fuel splashes on the belly and the vapor gets sucked in where the flap push rods go through the belly. The vent lines get a little splash of fuel in them and the action in the fuel tank expands the vapor and pushes a drop out on to the under belly.

Steve
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