Guy spin and launch a Discus Launch Glider. How to launch a Discus Launch Glider (DLG). My best flight time is over 11 minutes from one throw. After launching you fly around looking for thermals. Once you find one, you circle in it and because these planes are so light the thermal will lift them up like an elevator. My plane weighs about 8 oz ready to fly and is hand made out of carbon fiber.