Mike,

Don’t ask me the details, but from my personal experience in a Piper Cherokee many years ago, I’d strongly recommend against it. Back then, I thought that if the flight manual didn’t prohibit something, it was OK to do it. The result, scary but alive, was a good lesson that even my wife was able to comment upon: “WHAT were you thinking…” and I don’t recall that she was asking a question…

The Lancair MIGHT be OK for a ferry flight, but such an imbalance REALLY affects the handling of the airplane at slow airspeeds, will definitely cause it to depart controlled flight at a much higher airspeed than normal, and will adversely affect your ability to recover if it does so.

Could you load enough fuel for the flight in the good wing, and then add a corresponding amount to the left. You could transfer remaining fuel from the bad tank to the good one by disconnecting the feed from the engine, running a hose to the good tank and using the boost pump to empty the bad one.

Just my two cents

Bob