Is the fuel above or below the engine (high wing or low wing?)

it IS possible in a low wing configuration for one tank to completely
drain and then suck air.

The answer to that is to use a sump or gravity fed header tank.

The Velocity plans call for two strake mounted tanks, draining into a
single sump, from there the fuel is fed to the engine. In practice the
two strake tanks and sump function as a single fuel tank. The check
valve isnt necessary.

Dave

Rob Turk wrote:
Instead of using a left/right fuel selector, could I use two check valves
and connect the two tanks into a single feed?

[LTANK]---|-----T-----|-----[RTANK]

Where | and | are the check valves and 'T' is a T-connector towards the
header tank.
The check valves prevent fuel moving from one tank to the other. Any pro's,
con's or thoughts?

Rob