On Jul 30, 7:21 am, John Sinclair
wrote:
I don't find this to be true, Andy. Altimeters need
to be re-set primarily when landing at a destination
1000's of miles away from the takeoff location.

We have an AWOS right on the airport, so I set the mechanical and 302
to this shortly before takeoff. When I check the altimeter after 4-6
hours, the change is typically 1-200' - and usually puts me lower.
Really unsettling if I'm on a marginal glide and the air looks stable
ahead.

-Tom