That giant gas bag is what pilots call the `` envelope . '' Goodyear began making blimps in 1917 . Wind is a blimp 's worst enemy ; pilots control blimps with an odd steering wheel . The first blimp was made of wood and canvas, but the wind blew it around so much that eventually they had to make them out of metal. Goodyear plans an upgrade to faster , longer Zeppelin NT airships in 2014 .
Goodyear began making blimps in 1917 . Wind is a blimp 's worst enemy ; pilots control blimps with an odd steering wheel . The first blimp was made of wood and canvas, but the wind blew it around so much that eventually they had to make them out of metal. Goodyear plans an upgrade to faster , longer Zeppelin NT airships in 2014 .