Wikipedia:Featured pictures/Engineering and technology/Machinery

Epicyclic gear ratios at Epicyclic gearing, by Wapcaplet

Start of the four stroke cycle at Four stroke cycle, by Wapcaplet

Enigma rotor at Enigma machine, by Wapcaplet

Falkirk Wheel, by Sean McClean

Coal Power Station at Fossil fuel power plant, by BillC

Tugboat, by Al2

Jet engine, by Jeff Dahl based on an image from a FAA handbook

Tugboat, by Fcb981

LAFD ladder truck, by Mfield

Firebox (locomotive), by Raul654

Wire brushes, by Noodle snacks

Impact sprinkler mechanism in action, by Noodle snacks

Mazda6/Mazda Atenza, by jjron

Offshore wind farm, by Lycaon (edited by Mfield)

Movable type, by Willi Heidelbach

Gas metal arc welding at Arc welding, by William M. Plate Jr., United States Air Force

Nesjavellir geothermal power station, by Gretar Ivarsson

Steam turbine, by Siemens Pressebild

Steam locomotives of the Chicago & Northwestern Railway, by (and at) Jack Delano (edited by Durova)

Welder, by Alfred T. Palmer (edited by Durova)

Prototype submarine (at History of submarines), by Robert Fulton (edited by Durova)

Dogcart, by Detroit Publishing Co. (edited by Durova)

Convair B-36 with experimental caterpillar landing gear, by United States Air Force (edited by Slashme)

Lexington class battlecruiser, by F. Muller (edited by Durova)

Jaffa–Jerusalem railway, by American Colony Jerusalem (edited by Mvuijlst)