Sometimes losing all your expensive electronics on your UAV is not an option. Never a 100% failsafe option (due to the infinite number of possible failures) the implementation of a parachute recovery system is one way to save the airframe and onboard components if there is an in-flight emergency. We have designed two basic types for both active and passive deployment.
Aero Telemetry has provided several different types and styles of Parachute Recovery Systems that have been implemented on many different unmanned air vehicle projects.