A designer built an incredible working model of a plane engine. Footage shows the GE90 reverse-engine thrust system miniature being tested on its maker's desk in Zhejiang, China on May 22.

Without question, the Rolls-Royce Merlin engine is one of the greatest piston pushers ever made. The 27-liter V12 was built in the 1930s and 1940s and would eventually go on to power allied ...