Futaba 8FGAS, 8FGHS 2.4GHz - Manual (Page 42)

42 <Model Basic Setting Procedure>
12. Throttle mixing setting
*If throttle mixing is necessary for a compensation for
slowing of engine speed caused by swash plate operation
during aileron or elevator operation, please refer to the
THROTTLE MIX function, p.129.
13. Other special mixings
●Pitch to Needle mixing
This mixing is used with engines with a design which
allows needle control during flight (fuel-air mixture
adjustment). A needle curve can be set.
●Governor mixing
This mixing is dedicated governor mixing when a
GV-1 (governor) is used.