Russia's federal air transport regulator has approved operation of the Yakovlev MC-21's domestically-built engines at low temperatures. The Aviadvigatel PD-14 powerplant has been developed for the ...

Combustion engines only use a quarter of the fuel’s potential energy while the rest is lost as heat through exhaust. Now, a ...

Diesel engines operate more efficiently than gasoline-powered ones, and they're crucial to the U.S. economy. But does this ...