? guentheraviator at yahoo.com Brad sorry to hear of your a/c I'm glad to hear the TP has recovered! I saw your pictures and the TOUGH TANK picture, Does that tank have a vented fuel cap what was the tank made material? I had an intergral composite epoxy tank I replaced with a 16 gallon polyethelyene fuel cell from race cars supplier. To note: about fuel cell material I was under the impression that it to is compatible with fuel however I have to disagree My tank was built and the structure to support it and after having a few gallons in it drained it and didn't mess with it for several months. I attempted to extract the tank but it swelled in the support structure. I finally got it out and the tank retangular dimension that was 23 " was now 23.25" so after contacting the technical staff "they said a 3% expansion could happen" mine was 6% expansion. So I enlarged my support structure and the tank fits? correctly now. If the tank continues to swell I'm going to aluminum. My KR header tank can work with gravity only however I am still going to use the engine driven fuel pump for continuous use. The aircraft we fly can pitchup in a climb up to 30 degrees so the fuel level of the tank sump has to be above the carb inlet and the fuel pump delivers 4-6 psi . I have read stories about Lycoming fuel pump problems and with the fuels and vapor pressures we experience I know that fuel starvation is all so much critical and complete study of each fuel system design is crucial for safety of flight!
