lighter-than-air craft

But in one hour the storm will ground all small lighter-than-air craft.

It would operate as a lighter-than-air craft from the station at 140,000 feet to 180,000 feet.

And ride the desert thermals in lighter-than-air craft of his own design.

It is also one of the most expensive lighter-than-air craft ever built.

It has to be a lighter-than-air craft of at least five hundred thousand cubic feet to reach that altitude.

It is the first known demonstration of a practical lighter-than-air craft.

Consequently, he personally inspected every lighter-than-air craft built for and used by the Army during the war.

The Land is too far ahead of us on the learning curve with lighter-than-air craft.

Since then, lighter-than-air craft have been used mainly for advertising or to provide aerial views for television cameras.

Helium was primarily used as a lifting gas in lighter-than-air craft.