LIGHTER-THAN AIR AIRCRAFT

**Definition:** This place covers:

**Glossary:** - Balloon: Rigid or non-rigid free-flying (no directional control) lighter than air aircraft - Blimp: Non-rigid flight controlled lighter than air aircraft - Zeppelin: Rigid flight controlled lighter than air aircraft - Hybrid airship: Aircraft where lift is produced by both lighter than air compartments and aerodynamic surfaces (wings)