Possible Clues:

• German inventor of the first rigid motorized dirigible
• One floated up the river at last, but not in the water
• Dirigible balloon
• Count as an old gas-bag
• Cigar-shaped aircraft
• Count Ferdinand von - - , German aeronautical pioneer
• One dropping charges was full of hot air
• Count as one of the earliest air-ships
• A German dirigible
• Old German gasbag originally meant to be aggressive