The excavators produced by LEGO®
Technic are all similar in size, but vary greatly in the way that their
functionality is achieved. Two use pneumatics for the bucket and
boom motion, while the another is purely mechanical. The most
recent uses linear actuators instead of pneumatics. Only one
features powered slewing and steering.
My favorite is the first,
8851. It is
the most functionally complex and realistic looking, though also the
most expensive. No surprise there.
