Home WORLD The McDonnell XF-85 Goblin Aircraft -The Flying Egg

The McDonnell XF-85 Goblin Aircraft -The Flying Egg


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.

source: Logic Earth/image: wikimedia

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.

source: Logic Earth/image: wikimedia

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.