On Oct 30, 2013, at 9:11 AM, Craig Berland <cberland@systems3.net> wrote:

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Ralf,=

My experience is identi= cal to yours and I have winglets. When adding power and allowing the b= all to move off center, a wing will drop and you get some lateral force in c= ombination that unloads the left fuel port. That is why I always land and take off on the right tank. = With Cheltons it is easy to check the trip planner once in cruise and know h= ow much fuel you will land with. I plan on having a few more gallons i= n the right tank and land on the right tank. I keep fuel balanced within 8 gallons or so and I never have to trim the ai= lerons. If a wing is low, it is always due to rudder trim. I do n= ot have a yaw damper. It is important to keep the ball centered on tak= eoff with full fuel to prevent losing fuel out the left vent.

Craig Berland

N7VG<= /p>

Dear subscribers,

I noticed a phenomena on my 4P that I thought might b= e worth sharing to see if it is unique or may be others experienced somethin= g similar:

When my ball is significantly out of center over a lo= nger period of time (>30 sec), my fuel selector is on left, and I have le= ss than 15 gals in my left tank my engine will quit due to fuel starvation.

It happens mainly when I am practicing approaches: on= the missed go around, when I am busy applying power, getting gears and flap= s up, selecting my next way point in the GPS, changing my approach plates=E2= =80=A6 if I am on the left tank with low fuel and I forget to retrim the rudder for the changed power setting my eng= ine will shut down due to fuel starvation. My fuel indicator will then show z= ero for the left tank. Switching the tanks and applying high boost brings it= back to life within seconds. After 30 seconds or so I can see the original amount of fuel again in the l= eft tank. It is not a big deal anymore because I know how to fix it but it c= ertainly caught my full attention the first time.

In climb with full fuel I can also notice that I am l= oosing fuel out of the left vent on the wing tip if I don=E2=80=99t keep my b= all in the middle.

In straight and level flight I can run this tank dry w= ith the exact amount of unusable fuel to which I calibrated my fuel indicato= r on the ground.

The only explanation that I have for this phenomena i= s that this uncoordinated flight situation must create some kind of vacuum o= n my wing tip around the vent port that sucks the fuel out towards the wing t= ip away from the fuselage. I have the regular wing tips and not the winglets.

Any input or advice is appreciated.

Ralf

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