Changes

Gliders are launched by winch or by towing behind a powered aircraft. There are a few gliders that have engines, so they can be self-launched or fly under power to the destination if conditions for gliding are not good.  

Gliders are launched by winch or by towing behind a powered aircraft. There are a few gliders that have engines, so they can be self-launched or fly under power to the destination if conditions for gliding are not good.  

Gliders were used in World War II to deliver troops to a battlefield. These gliders were towed behind other aircraft until released to glide to their destination.   

Gliders were used in World War II to deliver troops to a battlefield. These gliders were towed behind other aircraft until released to glide to their destination.