Free balloon
A free balloon is a free-flying balloon . It must be filled as a gas balloon with a lifting gas that is lighter than air, or it must be designed as a hot air balloon . Free balloons , together with tethered balloons (which have a constant connection to the ground by a line), are considered a separate aircraft class in Germany under aviation law.
Applications of the free balloon
- Balloon mail ( balloon flight competition )
- Ballooning
- Radiosonde
- Research balloon
- Scientific experiments
- Rockoon