Three brushless motors (one per pivot arm mounted on each shaft) keep pivot arms at zero position, around 135 degrees.
Everytime time user moves throttle around, motors are trying to return all three pivot arms at neutral position.
One switch to turn delta throttle into a normal throttle while crusing, locking two pivot arms together (arm 2 and 3) while leaving arm 1 (Y axis only) to move freely or even lock it on last position.
One pot to change motors' voltage and resistance.
Option to change resistance depending on arms' position with arduino programming.
No need for springs.
Thoughts?