REFLECTOR: FG sump question

[Andrew Judge]

Did the same with my wife and two kids offshore navigating around a TS over Daytona last summer. Once I slowed down and descended for 5 minutes, it went away. Mine has something to do with the venting and fuel caps... Totally annoying. I'd do the same and move it down an inch and get a push testing light.

Andy

On Dec 3, 2010, at 11:52 PM, "Bellsouth Home" <dugasd at bellsouth.net<mailto:dugasd at bellsouth.net>> wrote:

If I rebuild mine the sensor will be lower.  Three switches and one emergency precautionary landing on a closed overgrown 3000ft. runway after descending at idle through three thousand ft. of undercast with ceilings of 700 ft. with my wife(a white knuckle flyer) in the plane all because of a flickering low fuel light on my first long cross country afraid the engine was about to quit.  I had sight gages but could not confirm feed to sump 550 hrs ago.
Rene'

Sent from Rene's iPad.


On Nov 30, 2010, at 9:05 PM, Matt Bucko <<mailto:mbuc310 at cox.net>mbuc310 at cox.net<mailto:mbuc310 at cox.net>> wrote:

It is not too late to move the vent. Actually a good idea.
Matt

On 11/30/2010 8:00 PM, Brian Michalk wrote:
I know it may be too late, but if I were to do it again, I would put the vent holes at one of the top corners.  The air bubble is not going to spend much time at the middle.

Try to burp the bubble.  If that's gone, you won't have flickering.
Make sure your vent hoses do not have any dips (traps) below your max fuel level.

I think your sender location is okay.

On 11/30/2010 08:42 PM, Matt Bucko wrote:
I am ready to close out my sump tank, but have a question on the location of the low fuel sender hard point.

Per the plans, I located the center of the hardpoint 1.5 inches below the top of the tank.  I notice that this places the center of the hole, at about the same height off og the sump bottom as the fuel IN and vent holes.

I am toying with moving the sender down an additional inch to eliminate the low fuel light from flickering.... If it is too near the top of the fuel level.
Am I wrong to believe that the head pressure from the fuel tanks will fill the sump to the top?
Matt



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