I would like to be able to run my engine off my wing tanks
if needed but I don't want to re-plumb the wings with 3/8" lines.
Can I connect the 1/4" wing tank lines into a "T" with a
3/8" exit and run the line to the selector valve? Essentially the
wings would not be able to be selected but they would feed at the same time
equally.
Bryan,
I’d strongly discourage you from doing this…even
more strongly if you are feeding a fuel-injected engine. There are probably
many more on the LML that will also advise on this, but the main reason not to
do this is that your proposed configuration allows air to be easily pulled into
the fuel system, especially during the critical take off phase of flight. Even
a small amount of yaw during takeoff can un-port one of the wing tanks, allowing
air to be drawn into the lines and pushed to the engine. Almost guaranteed
engine stoppage, and if it’s a fuel injected engine, typically many
seconds to restart—if you recognize and correct the problem. If you don’t,
the engine won’t restart before you’re on the ground… L
The above is one of the reasons your airplane includes a header
tank in the first place… This is one area where you’d do well to
stick by the Lancair design.
Bob