Went to do some ski flying today from FBKS and I always set my altimeter to ground elevation 440ft. Turning the dial to do so it stopped at 1,900ft. I would turn the other direction all day long but stopped before I could get to correct elevation. So I flew it and my airspeed and VSI both worked fine as did the altimeter but at wrong elevation. It was reacting to the flight. So I was thinking my static port on side of plane. C170B. Now I'm understanding that if that static port is plugged the altimeter will stick and not respond at all.
Hope this makes sense. Long weekend.