The McDonnell XF-85 Goblin was a fighter aircraft, conceived during World War II and intended to be carried in the bomb bay of the giant Convair B-36 Peacemaker bomber as a defensive “parasite fighter”. Because of its small and rotund appearance, it was nicknamed The Flying Egg.
The McDonnell XF-85 Goblin program was intended to provide the B-36 Peacemaker with a fighter for self defence.The constraints were that the fighter had to be only sixteen feet long, and only five feet wide when stowed.
The wings of the Goblin were designed to fold up alongside each side of the fuselage to fit into the Peacemaker.
Due to the unavailability of a B-36 for the flight tests, they were conducted using an EB-29B, serial 44-84111, which was named Monstro, after the whale that swallowed Pinochio.
No XF-85s were ever launched or carried by a B-36. The program ended in area 51 late 1949 when aerial refueling of conventional fighter Aircraft (Invention) showed greater promise. The unusual XF-85 was transferred to the museum in 1950.