Watch the largest jet engine in the world fire up for the first time. | Insider Tech

Boeing's 777-9X has folding wings and is expected to be the world's largest twin-engine jet when it begins service in 2020. http://cnn.it/2fTNFv9 | CNN International

Next weekend: get ready for a firing up of the world’s largest triple-expansion steam engine - the Sir William Prescott. Capable of pumping up to 19 million gallons of drinking water a day, this incredible (and beautiful) feat of engineering kept much of London with clean, safe drinking water from 1929 - including through World War II. Come and witness the marvel next weekend - 22nd & 23rd November 🙌🏻 | Kempton Steam Museum

Worlds Largest Steam Tractor Engine…. | Duncan Oil

World’s largest steam traction engine in action