At 09:09 AM 10/25/2010, you wrote: >How big is your Bladder ? Virg =======================================================
It's not just about bladder as Mark pointed out in an earlier post. He can now make cross country trips, out and back, without refueling. I carry 4 hours of fuel (25 gal) and on my longest cross country to date I made a fuel stop after two hours to stretch and purchase some cheap auto fuel. My tanks are in the outboard wing panels only, 12.5 gallon in each wing and no header tank. They run from root to tip and extend only 10 inches behind the forward spar. From full to empty tanks my C.G. shifts forward 1 inch. I seldom run them completely full. Most of my local flying is done with 1/4 to 3/4 full tanks. I use two electric fuel pumps that can pump from either or both tanks, no engine driven fuel pump. I also have a small (4 AH) backup battery in case I lose my electrical system. That happened once and the backup battery kept the engine running without a miss. 385+ hours and no problems in spite of the fact that many said it couldn't be done. On a 7 foot long tank you'll want to make sure it is well baffled to eliminate any slosh. Larry Flesner
