Windy Tunnel Activity

https://www.teachengineering.org/view_activity.php?url=collection/cub_/activities/cub_airplanes/cub_airplanes_lesson02_activity1.xml

New link to activity site:
http://wayback.archive.org/web/20120524022956/http://www.swe.org/iac/LP/wind_tunnel.html