mechanism about differential spoilers

[junechw0326]

HI guys. Wanna ask for a detailed explanation about the mechanism of differential spoiler and non differential spoiler. How do them actually work? just get frustrated when i saw an expression below:

non differential spoiler:

speed brakes fully retracted:right spoiler extends
left spoiler remains retracted

speed brakes fully extended:right spoiler remains extended
left spoiler remains extended

speed brakes half extended:right spoiler extends further
left spoiler doesnt move

differential spoiler:

speed brakes fully retracted:right spoiler extends
left spoiler remains retracted

speed brakes fully extended:right spoiler remains extended
left spoiler retracts

speed brakes half extended:right spoiler extends further
left spoiler retracts

few questions about this statement:
here it was saying the difference between diff. spoiler and non-diff. spoiler is diff. spoiler retract and supplement roll control when speed brake is fully extended. however, if non-diff. spoiler doesnt contribute to roll control, why there is difference between right spoiler and left spoiler?(because of balancing P factor? I dont know just guess :P)
also why right spoiler needs to extend further when speed brake half extended?
is the situation of differential spoilers above talking about one direction roll movement or i am actually out of track?

Pls help!
i am a newbie on aviation as well as in this forum.sorry for my poor English and if i am posting it in a wrong place.

Thanks all!

[vapilot2004]

The term "differential spoilers" relates to how spoilers augment the roll commanded by the ailerons during speed brake operation. This arrangement maximizes the augmentation of roll control with a small sacrifice in (commanded) profile drag braking.

"Non-differential" spoiler arrangement will augment aileron roll control to a lesser degree during partial extension and when the speed brakes are fully extended, they offer no help.

The example you have given is for a right turn.

the difference between diff. spoiler and non-diff. spoiler is diff. spoiler retract and supplement roll control when speed brake is fully extended.

This is one of the key differences. See below for the rest.

however, if non-diff. spoiler doesnt contribute to roll control, why there is difference between right spoiler and left spoiler?

Non-differential (standard) spoiler deployment contributes to roll control in all but the fully extended speed brake configuration. Another way to think about it is the non-differential spoiler arrangement never reduces profile drag during roll control augmentation.

why right spoiler needs to extend further when speed brake half extended?

To assist with roll control.

[galaxy flyer]

One of the earliest solutions to this problem was to move the ailerons inboard to a stiffer part of the wing - as first seen on the F100 super sabre.

Might have solved aileron reversal, but the Hun still at strong adverse yaw at higher AOA—high G or slow speed. Nasty Sabre dance video. Best 500 hours of my flight time.