No. of days:
2 per team
A glider is a heavier-than-air aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine. Most gliders do not have an engine, although motor-gliders have small engines for extending their flight when necessary and some are even powerful enough to take off.
Gliders are principally used for the air sports of gliding, hang gliding and paragliding. Perhaps the simplest and most familiar types are toys such as the paper plane and balsa wood glider.