Ernest:
I sending this direct to you because while I enjoy reading the FLYROTARY mail list , I’m not registered.
Why not completely eliminate the dual (supply and return) fuel valve ?
Assuming fuel injection:
Run one rotor off of one tank, with its own pump and return line, and the other rotor off the second tank with its own pump and return.
Or in the case of a 4 cylinder engine, one pair opposed cylinders from one tank and the other pair from the other.
If you lose one half, the engine would have to run wide open throttle (WOT), and make a little less than half power.
With WOT, the pumping losses from the dead half of the engine will be minimal, like the braking of a diesel or 2-stroke engine.
Enough power to at least “extend your glide”, and maybe enough to maintain altitude in some cases.
regards
John C Papson
Director of Product Development
DigitalGrid Inc
201 Moreland Rd
Hauppauge NY
11788
Phone: (631) 271-7092 ex 127
FAX: (631) 271-7097
P.S OK to copy to the FLYROTARY list if you deem this worthwhile.