Bill Clapp http://www.krnet.org/krs/wc/ used 4-inch PVC pipe, 2 each joined together at both ends running from the WAF to the end of the wing and same for the other side. Bill had removable wing tips for inspection. He had no fuel gauge senders in the PVC pipes, but a 13-gallon header tank at the instrument panel with a tube sight gauge on the panel. Electric pumps on each side took fuel from the PVC pipes and dumped into the header tank. Then gravity feed to the engine. Fuel would slowly weep through the PVC; you could always smell gasoline fumes in the outer wing. One problem with using pipe for a fuel tank is sloshing during maneuvers and turbulence. Bill put fuel cell foam in the pipes. I did an experiment with PVC pipe. I filled a section of 1-1/2 inch PVC with gasoline with both ends glued tight. It took about 6 months for all the gasoline to evaporate. I did the same experiment with a section of 4-inch vinyl fence post with both ends glued on caps and about half full of fuel. I weigh the vinyl fence post tank once in a while. All the gasoline is still in the vinyl fence post after 4 years. I cannot say what condition the fuel is in since the tank is sealed, but it still sloshes like fuel. I will bring the vinyl fence post tank to the Gathering for your examination.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA [email protected] ---------------------------------------------------------- Does anyone remember who used irrigation tubing for wing tanks in their KR? Anyone know the material that the irrigation tubing is or the size? Thanks, Ron
