My experience last Friday confirms what Ed wrote below. At a fuel stop on the way to Watsonville, CA, I filled the wing tanks to my usual 1-2" from the top (any more and it spills out the cap vent holes when taxiing or climbing out). The flight to Watsonville from there took almost exactly 2 hrs., and I was pushing full throttle most of the way (due to concern about the marine layer of clouds and fog moving into Watsonville), which I don't usually do. Before fueling up at Watsonville, I dip-sticked the wing tanks: one barely wet the tip of the stick, and the other was at ~3 gal. mark (on a stick calibrated by another Ercouper who gifted it). However, when I then fueled to the same 1-2" from the top, it only took 10.8 gal. That dihedral "hid" ~2 gal. per side.
BTW, do the wing tanks feed *all* their fuel out to the fuel pump, or, put another way, is some of that ~2 gal. per side unusable fuel? Linda N3437H (Sky Sprite) L.A. Ed B wrote: Due to the Coupe's strong dihedral, there's usually a fair amount of fuel still in the tanks when the float gauge gets to empty and even when a dipstick used vertically at the filler cap shows empty.
