Hi Paul.
If i understood correctly it is better to employ the same scheme as the IC helicopters.
A normal 1,5 ltr tank and a header tank much like that used in the Raptor helicopter.
Are those header tanks suitable for turbine use?
If yes i suspect that a one way valve is needed for the tank in order to breath air since there is no
exaust pressure line like the exaust pipes of the IC engines have.
Thanks, Chris