> how to use capacitance probes for my wing tanks without placing > them in the tanks.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Robert, The only possibility I can envision is to have a stand pipe inside the cockpit , connected to the tank , where the level of fuel in the standpipe follows the level in the wing. In that case, why not just use a site gauge. I have 7 foot long probes in my wing tanks running from root to tip of the outer wing panel. Because the tank thickness changes from root to tip, they are not linear. For wing tanks where the wing has dihedral there is no perfect system, floats or otherwise. Know what fuel you start with, know your fuel burn, and watch the clock. Larry Flesner P.S. for Robert. I'll be in Nashville on occasion as my daughter is moving there next month. I'd like to visit your project and promise not to track dirt into your sterile workshop. :-)
