Hot air balloon sea level, and humidity of the air surrounding. On a warm day, a balloon cannot lift as much as on a cool day, because the temperature required for launch will exceed the maximum sustainable for nylon envelope fabric. Also, in the lower atmosphere, the lift provided by a hot air balloon decreases about 3% for each 1,000 meters (1% per 1,000 ft) of altitude gained. Standard hot air balloons are known as Montgolfier balloons and rely solely on the buoyancy of hot air provided by the burner and contained by the envelope. This style of balloon was developed by the
Duck Dodgers in the 24½th Century Duck Dodgers in the 24½th Century Duck Dodgers in the 24½ Century (spoken as "twenty-fourth-and-a-half") is a 1952 Merrie Melodies color cartoon from Warner Bros., first released on July 25, 1953, that stars Daffy Duck as space hero Duck Dodgers, Porky Pig as his assistant, and Marvin the Martian as his opponent. This cartoon marked the first of many appearances of the Duck Dodgers character. Marvin the Martian had been introduced as an unnamed villain in Warner's cartoon "Haredevil Hare" (1948), playing opposite Bugs Bunny. He was later given the title 'Commander, Flying Saucer X-2' in 1951's "The Hasty Hare".