I bought a RV-8 with Tuckey aux tanks (15 per side) but have no information on how the vent system was designed or how they were intended to be used. Today I was surprised to find that fuel had moved outboard to the aux tanks when they had been empty. (I suspect this was because the mains were full and sat awhile in the sun) This is a concern because I plan to do acro and want to make sure there is no fuel migration to the outer tanks. I have searched the forums and found the fuel tank drawing but nothing on the vent system or if a check valve was intended to be installed. It does have aux pumps.
Any help would be appreciated.
Any help would be appreciated.