The PowerLoader (P-5000) is the large robotic forklift truck used by Lt. Ripley against the Queen in the the sci-fi movie Aliens. The PowerLoader was originally an idea by Sid Mead, but the design itself is attributed to James Cameron (who went on to make Titanic). It was built using fibreglass, and was almost three meters tall! The model used in the film weighed six hundred pounds or about 272Kg.
Aliens PowerLoader Papercraft