Can anyone tell me what the gradients are in the white markers next to the pitch trim wheel in the Cessna 172? Do they indicate 2 degree intervals or 1 degree of pitch ?
And what do the letters TO (with a little white arrow) mean next to the wheel?
The gradient scale is only to show trim position in relation to total travel, the exact position in degrees is not important and of no use in the normal course of flying.
The TO position is the trim position for takeoff.