Conestoga was a privately-funded commercial launch vehicle built by Houston-based Space Services, Inc (SSI), which became the Space Service Division of EER Systems in 1990. Following a 1981 launch failure of its first, liquid-fuelled rocket named Percheron, SSI successfully tested its solid-propellant Conestoga 1, based on a Minuteman second stage engine, in 1982. However, the first operational flight of the rocket and the attempted launch of NASA's Meteor satellite in 1995 failed when the vehicle was destroyed 45 seconds into its first stage burn. There have been no further launches.