1) Connect input device(s) to control multiple analog axes to your PC and run arma3.
2) Open Options > Controls > Controller to ENABLE the connected device(s).
3) Open Options > Controls > Keyboard and assign ONE analog axis to "Car Right (Analog)".
4) Return to the title menu, open Virtual Garage and choose HEMTT (or any default cars) and take the driver seat.
5) Input the axis assigned at (3) to 100% and watch the steering wheel.
6) Open Options > Controls > Keyboard and assign ANOTHER analog axis to "Car Right (Analog)".
7) Input the axis assigned at (3) to 100% and watch the steering wheel.
8) Input the axis assigned at (6) to 100% and watch the steering wheel.
9) Input the BOTH of the axes to 100% and watch the steering wheel.
You can see the handle rotating about 90 degrees at (4) and (9)
and only 45 degrees at (7) and (8).
If you assign 3 axes, an axis turn the steering wheel 30 degrees at its max.