Very strange... All my planes, including default, are "unstable" under 8,000 feet. I looked at the winds and it indicates winds direction but no wind speed. The speed is also unstable, going up and down. Any solution? Thanks.

Have you tried clearing all weather? Sounds like you have a wind speed problem.Allcott

Do you have Turbulence selected? This effect is most pronounced under 10,000' and does affect the air speed indicator.

Thanks!

Your welcome!