Mike,
We have a sight gauge behind the seat, actually on the face of the baggage bay.
It is calibrated for the tail down configuration and is used when filling the
tank.
We have a pair of flow transducers, one for flow into engine and one for return
flow that display on our GRT EFIS (GRT requires 2 transducers for a 914 setup).
We have a pressure sensor at the bottom of the tank that gives independent
fuel quantity reading. That sensor is calibrated with the plane in level flight
attitude. This setup is like Erichs except he has just one transducer.
We have connected the two tank outlets together to simplify fuel management.
With
914 there is roughly 40 gph being returned to the tank. Knowing how much
is in the reserve side and when to switch and not leave unusable fuel in the
reserve
can be difficult. Tied together there is no question.
We check after flight that the fuel remaining from level flight gauge and flow
transducer agrees with what the sight gauge shows when back in the hangar.
Thats
a way to have confidence in the gauging and to verify no leaks.
We think most people do not use the foot sight gauge as it is hard to read, not
accurate because of distance from the tank and there are safety concerns with
a fuel hose running thru the cockpit.
We tried a capacitance gauge originally but different fuels 100LL vs MOGAS will
indicate differently.
With only using 5-6 gph, measuring fuel remaining accurately is important. A 1
gal error is 20 minutes flying.
Get in touch with Erich. Hes done a lot of novel things to his Europa.
Jim & Heather
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