Mailing List lml@lancaironline.net Message #17884
From: Ian B. Crowe <ian.crowe@sympatico.ca>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: Fuel probes
Date: Mon, 03 Mar 2003 21:45:13 -0500
To: <lml>
I too have the extended tanks but my  Skysport probes only go out to the original tank bulkhead.  This is the bulkhead that houses the aileron bell crank.
 
My experience has been that the tank gauge starts to read quite quickly.  You only have 5 gallons in the extension for a total capacity of just under 21 usg per side and the dihedral angle which causes the fuel at the tip to be higher than the inboard end is not so high that it creates a large dead spot in the gauge reading.
 
If you are a purist you have to fit the extended probes but it will not significantly improve the accuracy of the gauges.  I had gauge wiring problems and I wanted to recalibrate the gauges.  I filled one tank up to the filler and set the full trimmer, I then pumped this tank into the empty tank after setting the low trimmer.  What was interesting was that the when one read 3/4full the other read 1/4 full and this worked at 1/2 and 3/4 going the other way.  I concluded fom this that the system was linear.  Incidentally I then set the full probe on the tank I had just filled and the empty trimmer on the tank I had just emptied and refilled it.  Again the two gauges worked exactly in step.
 
Up to you of course but for my money I would not bother to spend money needlessly.
 
Ian Crowe
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster