brass, steel

wings rock back and forth as crank is turned

brass, steel, oak, paper

aluminum, brass, steel, concrete, mylar

brass, steel, bronze baby shoes, paper

brass steel

brass, maple, concrete, steel

cloth wings bob gently as pendulum swings

aluminum, brass, bronze rope, steel

wings flap when pendulum is pulled down

aluminum, brass, steel, electric motor

copper, wood, brass, steel

keraunothnetaphobia: the fear of being struck by falling man made satellites

brass, steel

aluminum, brass, steel

wings rise and fall rhythmically- controlled by a mechanically switched linear actuator

aluminum, brass, steel, electric motor

aluminum, brass, steel, copper, electric motor

aluminum, brass, steel, electric motor

balance machine teeters on its three legs and flaps wildly when running

aluminum, brass, steel, electric motor, NiCad battery pack, bowling ball

aluminum, brass, steel, electric motor

wings flap and machine shudders while running

brass, steel, paper