Eagle 5 is t he 1986 Winnebago Chieftain 33 that Lone Starr and Barf travel in, using it as a flying spaceship (with space engines and wings attached). They use it to rescue Princess Vespa. One might compare it with "Star Wars"' Millennium Falcon, or "Lost in Space"'s Jupiter 2 (although those two spaceships are flying saucers, not motorhomes).