RocLobster

If your current cockpit view is the default/head-on, then clicking and dragging that barometer knob has little-to-no effect. However, if you pan or tilt your view a bit, the knob suddenly becomes effective. It seemed to me that the more oblique an angle that I viewed the gauge, the stronger the input reaction. Zooming in on the gauge also seems to help, especially since the barometric scale is so small.