OSHKOSH—Piper Aircraft has partnered with jet-fueled, diesel piston-engine maker DeltaHawk to give future buyers of PA-44 Seminoles a way to bypass the looming U.S. transition away from leaded avgas.

Multiple space agencies plan to return astronauts to the moon by the end of this decade. Along with commercial and ...

With the increasing demand for lightweight construction machinery, it is of great significance to study nonmetallic materials that can replace steel plates to make hydraulic oil tanks. To explore the ...