Hi all,

First I'll start with my setup:
Model: Inspire 90 F3A
Motor: Hacker A50 12L
ESC: Jeti Advance 77 Opto Plus
prop: APC Electric Prop 16 x 10
Radio: Futaba 7CHP
Battery: Thunder Power eXtreme V2 8 cell 3850mAh

Now for the problem:
When I set all trimming to 0 on the radio I get a dead zone on the throttle up to 3/4. Only then it starts the motor.
When I raise the sub-trim to almost full, the motor starts at the beginning of the throttle travel.
Also, it looks like I get full power at half throttle.

There is no expo (set to 0) or end point (100%) settings for the throttle.

What could be the cause of such behaviour?

Maybe the controller is not set correctly.
What are the correct settings for it? (soft/hard timing etc.)

Many thanks for any response,
Sharon.