Helium balloon
High altitude airship system
High altitude two balloon airship
High-altitude balloon and method and apparatus for making it
High-altitude long-endurance airship
High-aspect ratio hybrid airship
Highly maneuverable powered airship
Hot air aerostat
Hot air balloon amusement ride
Hot air balloon and methods and devices for augmenting buoyancy,
Hot air rescue balloon
Hot air rescue balloon
Hot gas device
Hybrid air vehicle having air cushion landing gear
Hybrid annular airship
Hybrid annular airship
Hybrid unmanned vehicle for high altitude operations
Hybrid unmanned vehicle for high altitude operations
Hybrid winged airship (dynastat)
Hydrogen lighter-than-air ship