Dragonfall 5 is a series of children's science fiction novels written by Brian Earnshaw during the 1970s and illustrated by Simon Stern.
The series takes place in the 3rd millennium and concerns a (presumably British) family made up of Tim, Sanchez, Old Elias and Big Mother, traveling in the eponymous spaceship, the Dragonfall 5. They transport goods, passengers and other items to a variety of worlds. They have a pet dog called Jerk, who is a breed of flying hounds who can glide using his long ears, and several small rodent-like animals called Minims. The family always works in groups of three, and can jointly translate most alien languages.