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.

This prototype uses water cooling, PTFE rings, and 3D‑printed mounts to turn 200‑year‑old heat‑engine tech into a ...

In short, the Douglas DC-7 is considered the last major piston-engine, propeller-driven airliner in the US, with surviving ...

Planes revolutionized warfare in the 20th Century, and these fighter jets represent the best in military innovation during ...