Like a hard drive, a drum memory was a rotating surface of ferromagnetic material. Where a hard drive uses a platter, the drum uses a metal cylinder. A typical drum had a number of heads (one for ...

A "memory system" capable of storing 64,000 ... represented by small magnetic spots on the surface of the rapidly rotating drums. An elaborate system of recorders and play-backs "circulate ...

Inspired by the NASA RASSOR, the LunaREX digger utilizes a rotating drum with a trommel-like filter to pick up and store regolith up to 7 cm in diameter. The drum can pick up 0.5 kg of regolith ...