C-57D - Forbidden Planet Production

Forbidden Planet Production

In the movie's screenplay, the ship carries no name, only the designation "United Planets Cruiser C57-D."

The saucer has a lenticular profile. Above there is a dome, approximately a third of the diameter of a lens. Below there is a very shallow cylinder of about the same diameter, and a somewhat smaller dome that ostensibly houses the ship's faster-than-light light drive engine and central landing pedestal. The precise contours and proportions differ slightly between the models, full-size sets, and matte paintings used in the film. On landing, a stairway and two conveyor-loading ramps swing down at an angle from the central base of the bottom lens shape.

The original movie blueprints for the ship's command deck show it to have a central circular "navigation center", reminiscent of the TARDIS console used later in Doctor Who, with a transparent globe centered on a small model of the C57-D. Around this central space are a number of wedge-shaped rooms, including:

• A room with a curved table, chairs, and a space for books (presumably a galley and recreation room).
• A room with the "communications center", a chart table and the "main viewscope".
• A room with 16 bunk beds, with a pit and crane between it and the central area.
• A room with 9 "decelerator tubes". The movie shows the crew standing within these transparent cylinders while the ship decelerates from hyperdrive, but does not reveal whether the tubes must also be used during the ship's transition to faster-than-light speed.

On the ship's mezzanine level there is an instrument station and other rooms that aren't seen.

The studio created a stage set of the ship's interior command and mezzanine decks and a 60-foot (18 m) semicircular mockup of the landed ship's lower half (with the landing pedestal and ramps). The sets suggest that the saucer's size is between 100 feet (30 m) and 175 feet (53 m) feet in diameter.

Three miniatures were used, of 22 inches (56 cm), 44 inches (110 cm), and 82 inches (210 cm) or 88 inches (220 cm) in diameter, and costing an estimated $20,000. The largest miniature, constructed of wood, steel, and fiberglass, which contained the internal motors for the ramps, central pedestal, and red neon engine light, weighed 300 pounds (140 kg).

In 1970 MGM sold off the largest saucer miniature as part of the large MGM studio auction, but there was no later record kept of who bought the prop. A North Carolina man, who had originally bought the miniature and stored it in his garage, hadn't realized the prop's market value until 2008; so he finally put it up for auction that year, and it was sold for $78,000.