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The airplane I fly in my day job gave me an idea for my RV-7 rotary project. This airplane requires the center tank to be burned first, then the wing tanks may be used. To accomplish this, there are no sophisticated electronics nor any active logic at work; there are simply check valves in the system that allow the higher-pressure center pumps to push fuel ahead of the wing tank's pumps. When the center tanks run dry, the check valves close from reduced fuel pressure, allowing fuel from the wings to flow.
Soo, if it works for Boeing, it should work for a rotary, right? I figure in this case, fuel lines would join together at some point with check valves to prevent back-pressurizing the tank that's not being used. Switching tanks would be a simple matter of turning one pump on, and the other pump off. For simplicity, I'm only planning on return fuel to one tank.
Any thoughts?
Brooks
RV-7 -- Wiring up the EC2 for the engine's first run!
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